[PATCH v2 00/17] staging: wfx: fix support for big-endian hosts

[PATCH v2 00/17] staging: wfx: fix support for big-endian hosts

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Hello, 

As already discussed here[1], this series improves support for big
endian hosts. All warnings raised by sparse are now fixed.

Note, this series aims to be applied on top of PR named "staging: wfx:
fix Out-Of-Band IRQ"

[1] https://lore.kernel.org/lkml/20191111202852.GX26530@ZenIV.linux.org.uk

v2:
  Rewrite patch 13: keep the endianness of the field 'len' as-is and fix
  the accesses.

Jérôme Pouiller (17):
  staging: wfx: fix use of cpu_to_le32 instead of le32_to_cpu
  staging: wfx: take advantage of le32_to_cpup()
  staging: wfx: fix cast operator
  staging: wfx: fix wrong bytes order
  staging: wfx: fix output of rx_stats on big endian hosts
  staging: wfx: fix endianness of fields media_delay and tx_queue_delay
  staging: wfx: fix endianness of hif_req_read_mib fields
  staging: wfx: fix access to le32 attribute 'ps_mode_error'
  staging: wfx: fix access to le32 attribute 'event_id'
  staging: wfx: fix access to le32 attribute 'indication_type'
  staging: wfx: declare the field 'packet_id' with native byte order
  staging: wfx: fix endianness of the struct hif_ind_startup
  staging: wfx: fix access to le32 attribute 'len'
  staging: wfx: fix endianness of the field 'status'
  staging: wfx: fix endianness of the field 'num_tx_confs'
  staging: wfx: fix endianness of the field 'channel_number'
  staging: wfx: update TODO

 drivers/staging/wfx/TODO              | 19 -----------
 drivers/staging/wfx/bh.c              | 17 +++++-----
 drivers/staging/wfx/data_rx.c         |  4 +--
 drivers/staging/wfx/data_tx.c         |  7 ++--
 drivers/staging/wfx/debug.c           | 13 +++++---
 drivers/staging/wfx/hif_api_cmd.h     | 42 ++++++++++--------------
 drivers/staging/wfx/hif_api_general.h | 47 ++++++++++++++++-----------
 drivers/staging/wfx/hif_rx.c          | 38 ++++++++++++----------
 drivers/staging/wfx/hif_tx.c          | 18 +++++-----
 drivers/staging/wfx/hif_tx_mib.c      |  2 +-
 drivers/staging/wfx/hwio.c            |  2 +-
 drivers/staging/wfx/main.c            |  2 +-
 drivers/staging/wfx/traces.h          | 10 +++---
 13 files changed, 104 insertions(+), 117 deletions(-)

-- 
2.26.2

[PATCH v2 01/17] staging: wfx: fix use of cpu_to_le32 instead of le32_to_cpu

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Sparse detected that le32_to_cpu should be used instead of cpu_to_le32.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hwio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/hwio.c b/drivers/staging/wfx/hwio.c
index d878cb3e84fc..777217cdf9a7 100644
--- a/drivers/staging/wfx/hwio.c
+++ b/drivers/staging/wfx/hwio.c
@@ -205,7 +205,7 @@ static int indirect_read32_locked(struct wfx_dev *wdev, int reg,
 		return -ENOMEM;
 	wdev->hwbus_ops->lock(wdev->hwbus_priv);
 	ret = indirect_read(wdev, reg, addr, tmp, sizeof(u32));
-	*val = cpu_to_le32(*tmp);
+	*val = le32_to_cpu(*tmp);
 	_trace_io_ind_read32(reg, addr, *val);
 	wdev->hwbus_ops->unlock(wdev->hwbus_priv);
 	kfree(tmp);
-- 
2.26.2

[PATCH v2 02/17] staging: wfx: take advantage of le32_to_cpup()

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

le32_to_cpu(*x) can be advantageously converted in le32_to_cpup(x).

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index ac4ec4f30496..83c3fdbb10fa 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -22,7 +22,7 @@ static int hif_generic_confirm(struct wfx_dev *wdev,
 			       const struct hif_msg *hif, const void *buf)
 {
 	// All confirm messages start with status
-	int status = le32_to_cpu(*((__le32 *) buf));
+	int status = le32_to_cpup((__le32 *)buf);
 	int cmd = hif->id;
 	int len = hif->len - 4; // drop header
 
-- 
2.26.2

[PATCH v2 03/17] staging: wfx: fix cast operator

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Sparse detects that le16_to_cpup() expects a __le16 * as argument.

Change the cast operator to be compliant with sparse.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/bh.c     | 2 +-
 drivers/staging/wfx/traces.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/bh.c b/drivers/staging/wfx/bh.c
index 2572fbcf1a33..55724e4295c4 100644
--- a/drivers/staging/wfx/bh.c
+++ b/drivers/staging/wfx/bh.c
@@ -70,7 +70,7 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
 	if (wfx_data_read(wdev, skb->data, alloc_len))
 		goto err;
 
-	piggyback = le16_to_cpup((u16 *)(skb->data + alloc_len - 2));
+	piggyback = le16_to_cpup((__le16 *)(skb->data + alloc_len - 2));
 	_trace_piggyback(piggyback, false);
 
 	hif = (struct hif_msg *)skb->data;
diff --git a/drivers/staging/wfx/traces.h b/drivers/staging/wfx/traces.h
index bb9f7e9e7d21..c78c46b1c990 100644
--- a/drivers/staging/wfx/traces.h
+++ b/drivers/staging/wfx/traces.h
@@ -184,7 +184,7 @@ DECLARE_EVENT_CLASS(hif_data,
 		if (!is_recv &&
 		    (__entry->msg_id == HIF_REQ_ID_READ_MIB ||
 		     __entry->msg_id == HIF_REQ_ID_WRITE_MIB)) {
-			__entry->mib = le16_to_cpup((u16 *) hif->body);
+			__entry->mib = le16_to_cpup((__le16 *)hif->body);
 			header_len = 4;
 		} else {
 			__entry->mib = -1;
-- 
2.26.2

[PATCH v2 04/17] staging: wfx: fix wrong bytes order

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The field wakeup_period_max from struct hif_mib_beacon_wake_up_period is
a u8. So, assigning it a __le16 produces a nasty bug on big-endian
architectures.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_tx_mib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/hif_tx_mib.c b/drivers/staging/wfx/hif_tx_mib.c
index 65381b22437e..567c61d1fe2e 100644
--- a/drivers/staging/wfx/hif_tx_mib.c
+++ b/drivers/staging/wfx/hif_tx_mib.c
@@ -32,7 +32,7 @@ int hif_set_beacon_wakeup_period(struct wfx_vif *wvif,
 	struct hif_mib_beacon_wake_up_period val = {
 		.wakeup_period_min = dtim_interval,
 		.receive_dtim = 0,
-		.wakeup_period_max = cpu_to_le16(listen_interval),
+		.wakeup_period_max = listen_interval,
 	};
 
 	if (dtim_interval > 0xFF || listen_interval > 0xFFFF)
-- 
2.26.2

[PATCH v2 05/17] staging: wfx: fix output of rx_stats on big endian hosts

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The struct hif_rx_stats contains only little endian values. Thus, it is
necessary to fix byte ordering before to use them.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/debug.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/wfx/debug.c b/drivers/staging/wfx/debug.c
index 2fae6c913b01..846a0b29f8c9 100644
--- a/drivers/staging/wfx/debug.c
+++ b/drivers/staging/wfx/debug.c
@@ -155,7 +155,7 @@ static int wfx_rx_stats_show(struct seq_file *seq, void *v)
 	mutex_lock(&wdev->rx_stats_lock);
 	seq_printf(seq, "Timestamp: %dus\n", st->date);
 	seq_printf(seq, "Low power clock: frequency %uHz, external %s\n",
-		   st->pwr_clk_freq,
+		   le32_to_cpu(st->pwr_clk_freq),
 		   st->is_ext_pwr_clk ? "yes" : "no");
 	seq_printf(seq,
 		   "Num. of frames: %d, PER (x10e4): %d, Throughput: %dKbps/s\n",
@@ -165,9 +165,12 @@ static int wfx_rx_stats_show(struct seq_file *seq, void *v)
 	for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
 		if (channel_names[i])
 			seq_printf(seq, "%5s %8d %8d %8d %8d %8d\n",
-				   channel_names[i], st->nb_rx_by_rate[i],
-				   st->per[i], st->rssi[i] / 100,
-				   st->snr[i] / 100, st->cfo[i]);
+				   channel_names[i],
+				   le32_to_cpu(st->nb_rx_by_rate[i]),
+				   le16_to_cpu(st->per[i]),
+				   (s16)le16_to_cpu(st->rssi[i]) / 100,
+				   (s16)le16_to_cpu(st->snr[i]) / 100,
+				   (s16)le16_to_cpu(st->cfo[i]));
 	}
 	mutex_unlock(&wdev->rx_stats_lock);
 
-- 
2.26.2

[PATCH v2 06/17] staging: wfx: fix endianness of fields media_delay and tx_queue_delay

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The struct hif_cnf_tx contains only little endian values. Thus, it is
necessary to fix byte ordering before to use them. Especially, sparse
detected wrong access to fields media_delay and tx_queue_delay.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/data_tx.c | 3 ++-
 drivers/staging/wfx/traces.h  | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index f64149ab0484..014fa36c8f78 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -562,7 +562,8 @@ void wfx_tx_confirm_cb(struct wfx_vif *wvif, const struct hif_cnf_tx *arg)
 
 	if (!arg->status) {
 		tx_info->status.tx_time =
-		arg->media_delay - arg->tx_queue_delay;
+			le32_to_cpu(arg->media_delay) -
+			le32_to_cpu(arg->tx_queue_delay);
 		if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
 			tx_info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 		else
diff --git a/drivers/staging/wfx/traces.h b/drivers/staging/wfx/traces.h
index c78c46b1c990..959a0d31bf4e 100644
--- a/drivers/staging/wfx/traces.h
+++ b/drivers/staging/wfx/traces.h
@@ -387,8 +387,8 @@ TRACE_EVENT(tx_stats,
 		int i;
 
 		__entry->pkt_id = tx_cnf->packet_id;
-		__entry->delay_media = tx_cnf->media_delay;
-		__entry->delay_queue = tx_cnf->tx_queue_delay;
+		__entry->delay_media = le32_to_cpu(tx_cnf->media_delay);
+		__entry->delay_queue = le32_to_cpu(tx_cnf->tx_queue_delay);
 		__entry->delay_fw = delay;
 		__entry->ack_failures = tx_cnf->ack_failures;
 		if (!tx_cnf->status || __entry->ack_failures)
-- 
2.26.2

[PATCH v2 07/17] staging: wfx: fix endianness of hif_req_read_mib fields

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The structs hif_{req,cnf}_read_mib contain only little endian values.
Thus, it is necessary to fix byte ordering before to use them.
Especially, sparse detected wrong accesses to fields mib_id and length.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_tx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index 58013c019192..490a9de54faf 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -189,17 +189,17 @@ int hif_read_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id,
 	wfx_fill_header(hif, vif_id, HIF_REQ_ID_READ_MIB, sizeof(*body));
 	ret = wfx_cmd_send(wdev, hif, reply, buf_len, false);
 
-	if (!ret && mib_id != reply->mib_id) {
+	if (!ret && mib_id != le16_to_cpu(reply->mib_id)) {
 		dev_warn(wdev->dev,
 			 "%s: confirmation mismatch request\n", __func__);
 		ret = -EIO;
 	}
 	if (ret == -ENOMEM)
-		dev_err(wdev->dev,
-			"buffer is too small to receive %s (%zu < %d)\n",
-			get_mib_name(mib_id), val_len, reply->length);
+		dev_err(wdev->dev, "buffer is too small to receive %s (%zu < %d)\n",
+			get_mib_name(mib_id), val_len,
+			le16_to_cpu(reply->length));
 	if (!ret)
-		memcpy(val, &reply->mib_data, reply->length);
+		memcpy(val, &reply->mib_data, le16_to_cpu(reply->length));
 	else
 		memset(val, 0xFF, val_len);
 	kfree(hif);
-- 
2.26.2

[PATCH v2 08/17] staging: wfx: fix access to le32 attribute 'ps_mode_error'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The attribute ps_mode_error is little-endian. We have to take to the
endianness when we access it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_rx.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index 83c3fdbb10fa..87d5107a7757 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -158,6 +158,7 @@ static int hif_event_indication(struct wfx_dev *wdev,
 {
 	struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
 	const struct hif_ind_event *body = buf;
+	int cause;
 
 	if (!wvif) {
 		dev_warn(wdev->dev, "received event for non-existent vif\n");
@@ -176,10 +177,10 @@ static int hif_event_indication(struct wfx_dev *wdev,
 		dev_dbg(wdev->dev, "ignore BSSREGAINED indication\n");
 		break;
 	case HIF_EVENT_IND_PS_MODE_ERROR:
+		cause = le32_to_cpu(body->event_data.ps_mode_error);
 		dev_warn(wdev->dev, "error while processing power save request: %d\n",
-			 body->event_data.ps_mode_error);
-		if (body->event_data.ps_mode_error ==
-		    HIF_PS_ERROR_AP_NOT_RESP_TO_POLL) {
+			 cause);
+		if (cause == HIF_PS_ERROR_AP_NOT_RESP_TO_POLL) {
 			wvif->bss_not_support_ps_poll = true;
 			schedule_work(&wvif->update_pm_work);
 		}
-- 
2.26.2

[PATCH v2 09/17] staging: wfx: fix access to le32 attribute 'event_id'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The attribute event_id is little-endian. We have to take to the
endianness when we access it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_rx.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index 87d5107a7757..966315edbab8 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -158,6 +158,7 @@ static int hif_event_indication(struct wfx_dev *wdev,
 {
 	struct wfx_vif *wvif = wdev_to_wvif(wdev, hif->interface);
 	const struct hif_ind_event *body = buf;
+	int type = le32_to_cpu(body->event_id);
 	int cause;
 
 	if (!wvif) {
@@ -165,7 +166,7 @@ static int hif_event_indication(struct wfx_dev *wdev,
 		return 0;
 	}
 
-	switch (body->event_id) {
+	switch (type) {
 	case HIF_EVENT_IND_RCPI_RSSI:
 		wfx_event_report_rssi(wvif, body->event_data.rcpi_rssi);
 		break;
@@ -187,7 +188,7 @@ static int hif_event_indication(struct wfx_dev *wdev,
 		break;
 	default:
 		dev_warn(wdev->dev, "unhandled event indication: %.2x\n",
-			 body->event_id);
+			 type);
 		break;
 	}
 	return 0;
-- 
2.26.2

[PATCH v2 10/17] staging: wfx: fix access to le32 attribute 'indication_type'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The attribute indication_type is little-endian. We have to take to the
endianness when we access it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_rx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index 966315edbab8..fca9df620ad9 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -259,8 +259,9 @@ static int hif_generic_indication(struct wfx_dev *wdev,
 				  const struct hif_msg *hif, const void *buf)
 {
 	const struct hif_ind_generic *body = buf;
+	int type = le32_to_cpu(body->indication_type);
 
-	switch (body->indication_type) {
+	switch (type) {
 	case HIF_GENERIC_INDICATION_TYPE_RAW:
 		return 0;
 	case HIF_GENERIC_INDICATION_TYPE_STRING:
@@ -278,9 +279,8 @@ static int hif_generic_indication(struct wfx_dev *wdev,
 		mutex_unlock(&wdev->rx_stats_lock);
 		return 0;
 	default:
-		dev_err(wdev->dev,
-			"generic_indication: unknown indication type: %#.8x\n",
-			body->indication_type);
+		dev_err(wdev->dev, "generic_indication: unknown indication type: %#.8x\n",
+			type);
 		return -EIO;
 	}
 }
-- 
2.26.2

[PATCH v2 11/17] staging: wfx: declare the field 'packet_id' with native byte order

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The field packet_id is not interpreted by the device. It is only used as
identifier for the device answer. So it is not necessary to declare it
little endian. It fixes some warnings raised by Sparse without
complexifying the code.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_api_cmd.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/hif_api_cmd.h b/drivers/staging/wfx/hif_api_cmd.h
index 6f70801949bb..bb8c57291f74 100644
--- a/drivers/staging/wfx/hif_api_cmd.h
+++ b/drivers/staging/wfx/hif_api_cmd.h
@@ -254,7 +254,9 @@ struct hif_ht_tx_parameters {
 } __packed;
 
 struct hif_req_tx {
-	__le32 packet_id;
+	// packet_id is not interpreted by the device, so it is not necessary to
+	// declare it little endian
+	u32    packet_id;
 	u8     max_tx_rate;
 	struct hif_queue queue_id;
 	struct hif_data_flags data_flags;
@@ -283,7 +285,9 @@ struct hif_tx_result_flags {
 
 struct hif_cnf_tx {
 	__le32 status;
-	__le32 packet_id;
+	// packet_id is copied from struct hif_req_tx without been interpreted
+	// by the device, so it is not necessary to declare it little endian
+	u32    packet_id;
 	u8     txed_rate;
 	u8     ack_failures;
 	struct hif_tx_result_flags tx_result_flags;
-- 
2.26.2

[PATCH v2 12/17] staging: wfx: fix endianness of the struct hif_ind_startup

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The struct hif_ind_startup is received from the hardware. So it is
declared as little endian. However, it is also stored in the main driver
structure and used on different places in the driver. Sparse complains
about that:

    drivers/staging/wfx/data_tx.c:388:43: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:199:9: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:221:62: warning: restricted __le16 degrades to integer

In order to make Sparse happy and to keep access from the driver easy,
this patch declare hif_ind_startup with native endianness.

On reception of this struct, this patch takes care to do byte-swap and
keep Sparse happy.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_api_general.h | 11 +++++++----
 drivers/staging/wfx/hif_rx.c          |  8 ++++----
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/wfx/hif_api_general.h b/drivers/staging/wfx/hif_api_general.h
index f0135d27120c..995752b9f168 100644
--- a/drivers/staging/wfx/hif_api_general.h
+++ b/drivers/staging/wfx/hif_api_general.h
@@ -136,12 +136,15 @@ struct hif_otp_phy_info {
 } __packed;
 
 struct hif_ind_startup {
+	// As the others, this struct is interpreted as little endian by the
+	// device. However, this struct is also used by the driver. We prefer to
+	// declare it in native order and doing byte swap on reception.
 	__le32 status;
-	__le16 hardware_id;
+	u16    hardware_id;
 	u8     opn[14];
 	u8     uid[8];
-	__le16 num_inp_ch_bufs;
-	__le16 size_inp_ch_buf;
+	u16    num_inp_ch_bufs;
+	u16    size_inp_ch_buf;
 	u8     num_links_ap;
 	u8     num_interfaces;
 	u8     mac_addr[2][ETH_ALEN];
@@ -155,7 +158,7 @@ struct hif_ind_startup {
 	u8     disabled_channel_list[2];
 	struct hif_otp_regul_sel_mode_info regul_sel_mode_info;
 	struct hif_otp_phy_info otp_phy_info;
-	__le32 supported_rate_mask;
+	u32    supported_rate_mask;
 	u8     firmware_label[128];
 } __packed;
 
diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index fca9df620ad9..9b4f0c4ba745 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -100,10 +100,10 @@ static int hif_startup_indication(struct wfx_dev *wdev,
 		return -EINVAL;
 	}
 	memcpy(&wdev->hw_caps, body, sizeof(struct hif_ind_startup));
-	le32_to_cpus(&wdev->hw_caps.status);
-	le16_to_cpus(&wdev->hw_caps.hardware_id);
-	le16_to_cpus(&wdev->hw_caps.num_inp_ch_bufs);
-	le16_to_cpus(&wdev->hw_caps.size_inp_ch_buf);
+	le16_to_cpus((__le16 *)&wdev->hw_caps.hardware_id);
+	le16_to_cpus((__le16 *)&wdev->hw_caps.num_inp_ch_bufs);
+	le16_to_cpus((__le16 *)&wdev->hw_caps.size_inp_ch_buf);
+	le32_to_cpus((__le32 *)&wdev->hw_caps.supported_rate_mask);
 
 	complete(&wdev->firmware_ready);
 	return 0;
-- 
2.26.2

[PATCH v2 13/17] staging: wfx: fix access to le32 attribute 'len'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Sparse complains about the accesses to the field 'len' from struct hif_msg:

    drivers/staging/wfx/bh.c:88:32: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:88:32: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:93:32: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:93:32: warning: cast to restricted __le16
    drivers/staging/wfx/bh.c:93:32: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/bh.c:121:25: warning: incorrect type in argument 2 (different base types)
    drivers/staging/wfx/bh.c:121:25:    expected unsigned int len
    drivers/staging/wfx/bh.c:121:25:    got restricted __le16 [usertype] len
    drivers/staging/wfx/hif_rx.c:27:22: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/hif_rx.c:347:39: warning: incorrect type in argument 7 (different base types)
    drivers/staging/wfx/hif_rx.c:347:39:    expected unsigned int [usertype] len
    drivers/staging/wfx/hif_rx.c:347:39:    got restricted __le16 const [usertype] len
    drivers/staging/wfx/hif_rx.c:365:39: warning: incorrect type in argument 7 (different base types)
    drivers/staging/wfx/hif_rx.c:365:39:    expected unsigned int [usertype] len
    drivers/staging/wfx/hif_rx.c:365:39:    got restricted __le16 const [usertype] len
    drivers/staging/wfx/./traces.h:195:1: warning: incorrect type in assignment (different base types)
    drivers/staging/wfx/./traces.h:195:1:    expected int msg_len
    drivers/staging/wfx/./traces.h:195:1:    got restricted __le16 const [usertype] len
    drivers/staging/wfx/./traces.h:195:1: warning: incorrect type in assignment (different base types)
    drivers/staging/wfx/./traces.h:195:1:    expected int msg_len
    drivers/staging/wfx/./traces.h:195:1:    got restricted __le16 const [usertype] len
    drivers/staging/wfx/debug.c:319:20: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/secure_link.c:85:27: warning: restricted __le16 degrades to integer
    drivers/staging/wfx/secure_link.c:85:27: warning: restricted __le16 degrades to integer

Indeed, the attribute len is little-endian. We have to take to the
endianness when we access it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/bh.c     | 13 ++++++-------
 drivers/staging/wfx/debug.c  |  2 +-
 drivers/staging/wfx/hif_rx.c |  6 +++---
 drivers/staging/wfx/traces.h |  2 +-
 4 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/wfx/bh.c b/drivers/staging/wfx/bh.c
index 55724e4295c4..6c6e29cb7dcf 100644
--- a/drivers/staging/wfx/bh.c
+++ b/drivers/staging/wfx/bh.c
@@ -84,13 +84,12 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
 			// piggyback is probably correct.
 			return piggyback;
 		}
-		le16_to_cpus(&hif->len);
-		computed_len = round_up(hif->len - sizeof(hif->len), 16)
-			       + sizeof(struct hif_sl_msg)
-			       + sizeof(struct hif_sl_tag);
+		computed_len =
+			round_up(le16_to_cpu(hif->len) - sizeof(hif->len), 16) +
+			sizeof(struct hif_sl_msg) +
+			sizeof(struct hif_sl_tag);
 	} else {
-		le16_to_cpus(&hif->len);
-		computed_len = round_up(hif->len, 2);
+		computed_len = round_up(le16_to_cpu(hif->len), 2);
 	}
 	if (computed_len != read_len) {
 		dev_err(wdev->dev, "inconsistent message length: %zu != %zu\n",
@@ -118,7 +117,7 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
 		wdev->hif.rx_seqnum = (hif->seqnum + 1) % (HIF_COUNTER_MAX + 1);
 	}
 
-	skb_put(skb, hif->len);
+	skb_put(skb, le16_to_cpu(hif->len));
 	// wfx_handle_rx takes care on SKB livetime
 	wfx_handle_rx(wdev, skb);
 	if (!wdev->hif.tx_buffers_used)
diff --git a/drivers/staging/wfx/debug.c b/drivers/staging/wfx/debug.c
index 846a0b29f8c9..f52e7cf885cb 100644
--- a/drivers/staging/wfx/debug.c
+++ b/drivers/staging/wfx/debug.c
@@ -250,7 +250,7 @@ static ssize_t wfx_send_hif_msg_write(struct file *file,
 	request = memdup_user(user_buf, count);
 	if (IS_ERR(request))
 		return PTR_ERR(request);
-	if (request->len != count) {
+	if (le16_to_cpu(request->len) != count) {
 		kfree(request);
 		return -EINVAL;
 	}
diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index 9b4f0c4ba745..36132909a6ae 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -24,7 +24,7 @@ static int hif_generic_confirm(struct wfx_dev *wdev,
 	// All confirm messages start with status
 	int status = le32_to_cpup((__le32 *)buf);
 	int cmd = hif->id;
-	int len = hif->len - 4; // drop header
+	int len = le16_to_cpu(hif->len) - 4; // drop header
 
 	WARN(!mutex_is_locked(&wdev->hif_cmd.lock), "data locking error");
 
@@ -348,7 +348,7 @@ static int hif_error_indication(struct wfx_dev *wdev,
 	else
 		dev_err(wdev->dev, "asynchronous error: unknown: %08x\n", type);
 	print_hex_dump(KERN_INFO, "hif: ", DUMP_PREFIX_OFFSET,
-		       16, 1, hif, hif->len, false);
+		       16, 1, hif, le16_to_cpu(hif->len), false);
 	wdev->chip_frozen = true;
 
 	return 0;
@@ -366,7 +366,7 @@ static int hif_exception_indication(struct wfx_dev *wdev,
 	else
 		dev_err(wdev->dev, "firmware exception\n");
 	print_hex_dump(KERN_INFO, "hif: ", DUMP_PREFIX_OFFSET,
-		       16, 1, hif, hif->len, false);
+		       16, 1, hif, le16_to_cpu(hif->len), false);
 	wdev->chip_frozen = true;
 
 	return -1;
diff --git a/drivers/staging/wfx/traces.h b/drivers/staging/wfx/traces.h
index 959a0d31bf4e..7298fb948f56 100644
--- a/drivers/staging/wfx/traces.h
+++ b/drivers/staging/wfx/traces.h
@@ -174,7 +174,7 @@ DECLARE_EVENT_CLASS(hif_data,
 		int header_len;
 
 		__entry->tx_fill_level = tx_fill_level;
-		__entry->msg_len = hif->len;
+		__entry->msg_len = le16_to_cpu(hif->len);
 		__entry->msg_id = hif->id;
 		__entry->if_id = hif->interface;
 		if (is_recv)
-- 
2.26.2

[PATCH v2 14/17] staging: wfx: fix endianness of the field 'status'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The field 'status' appears in most of structs returned by the hardware.
This field is encoded as little endian. Sparse complains this field is
not always correctly accessed:

    drivers/staging/wfx/data_rx.c:53:16: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/data_rx.c:84:16: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/data_tx.c:526:24: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/data_tx.c:569:23: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/hif_rx.c:128:33: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/./traces.h:401:1: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/./traces.h:401:1: warning: restricted __le32 degrades to integer

In most of cases, this field is only compared with HIF_STATUS values.
Finally, it is more convenient to solve the problem by defining the
HIF_STATUS values directly in little endian.

It is also the right time to make some clean up in the HIF_STATUS names.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/data_rx.c         |  4 +--
 drivers/staging/wfx/data_tx.c         |  4 +--
 drivers/staging/wfx/hif_api_cmd.h     | 16 ------------
 drivers/staging/wfx/hif_api_general.h | 36 ++++++++++++++++-----------
 drivers/staging/wfx/hif_rx.c          |  2 +-
 drivers/staging/wfx/hif_tx.c          |  4 +--
 drivers/staging/wfx/main.c            |  2 +-
 drivers/staging/wfx/traces.h          |  2 +-
 8 files changed, 30 insertions(+), 40 deletions(-)

diff --git a/drivers/staging/wfx/data_rx.c b/drivers/staging/wfx/data_rx.c
index c3b3edae3420..0e959ebc38b5 100644
--- a/drivers/staging/wfx/data_rx.c
+++ b/drivers/staging/wfx/data_rx.c
@@ -49,7 +49,7 @@ static int wfx_drop_encrypt_data(struct wfx_dev *wdev,
 	}
 
 	/* Firmware strips ICV in case of MIC failure. */
-	if (arg->status == HIF_STATUS_MICFAILURE)
+	if (arg->status == HIF_STATUS_RX_FAIL_MIC)
 		icv_len = 0;
 
 	if (skb->len < hdrlen + iv_len + icv_len) {
@@ -79,7 +79,7 @@ void wfx_rx_cb(struct wfx_vif *wvif,
 	     ieee80211_is_beacon(frame->frame_control)))
 		goto drop;
 
-	if (arg->status == HIF_STATUS_MICFAILURE)
+	if (arg->status == HIF_STATUS_RX_FAIL_MIC)
 		hdr->flag |= RX_FLAG_MMIC_ERROR;
 	else if (arg->status)
 		goto drop;
diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index 014fa36c8f78..4a2910897b6f 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -528,7 +528,7 @@ void wfx_tx_confirm_cb(struct wfx_vif *wvif, const struct hif_cnf_tx *arg)
 		if (rate->idx < 0)
 			break;
 		if (tx_count < rate->count &&
-		    arg->status == HIF_STATUS_RETRY_EXCEEDED &&
+		    arg->status == HIF_STATUS_TX_FAIL_RETRIES &&
 		    arg->ack_failures)
 			dev_dbg(wvif->wdev->dev,
 				"all retries were not consumed: %d != %d\n",
@@ -568,7 +568,7 @@ void wfx_tx_confirm_cb(struct wfx_vif *wvif, const struct hif_cnf_tx *arg)
 			tx_info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 		else
 			tx_info->flags |= IEEE80211_TX_STAT_ACK;
-	} else if (arg->status == HIF_REQUEUE) {
+	} else if (arg->status == HIF_STATUS_TX_FAIL_REQUEUE) {
 		WARN(!arg->tx_result_flags.requeue,
 		     "incoherent status and result_flags");
 		if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
diff --git a/drivers/staging/wfx/hif_api_cmd.h b/drivers/staging/wfx/hif_api_cmd.h
index bb8c57291f74..d76722bff7ee 100644
--- a/drivers/staging/wfx/hif_api_cmd.h
+++ b/drivers/staging/wfx/hif_api_cmd.h
@@ -66,22 +66,6 @@ union hif_commands_ids {
 	enum hif_indications_ids indication;
 };
 
-enum hif_status {
-	HIF_STATUS_SUCCESS              = 0x0,
-	HIF_STATUS_FAILURE              = 0x1,
-	HIF_INVALID_PARAMETER           = 0x2,
-	HIF_STATUS_WARNING              = 0x3,
-	HIF_ERROR_UNSUPPORTED_MSG_ID    = 0x4,
-	HIF_STATUS_DECRYPTFAILURE       = 0x10,
-	HIF_STATUS_MICFAILURE           = 0x11,
-	HIF_STATUS_NO_KEY_FOUND         = 0x12,
-	HIF_STATUS_RETRY_EXCEEDED       = 0x13,
-	HIF_STATUS_TX_LIFETIME_EXCEEDED = 0x14,
-	HIF_REQUEUE                     = 0x15,
-	HIF_STATUS_REFUSED              = 0x16,
-	HIF_STATUS_BUSY                 = 0x17
-};
-
 struct hif_reset_flags {
 	u8     reset_stat:1;
 	u8     reset_all_int:1;
diff --git a/drivers/staging/wfx/hif_api_general.h b/drivers/staging/wfx/hif_api_general.h
index 995752b9f168..f5abd8174706 100644
--- a/drivers/staging/wfx/hif_api_general.h
+++ b/drivers/staging/wfx/hif_api_general.h
@@ -67,21 +67,27 @@ enum hif_general_indications_ids {
 	HIF_IND_ID_SL_EXCHANGE_PUB_KEYS = 0xe5
 };
 
-enum hif_hi_status {
-	HI_STATUS_SUCCESS                             = 0x0000,
-	HI_STATUS_FAILURE                             = 0x0001,
-	HI_INVALID_PARAMETER                          = 0x0002,
-	HI_STATUS_GPIO_WARNING                        = 0x0003,
-	HI_ERROR_UNSUPPORTED_MSG_ID                   = 0x0004,
-	SL_MAC_KEY_STATUS_SUCCESS                     = 0x005A,
-	SL_MAC_KEY_STATUS_FAILED_KEY_ALREADY_BURNED   = 0x006B,
-	SL_MAC_KEY_STATUS_FAILED_RAM_MODE_NOT_ALLOWED = 0x007C,
-	SL_MAC_KEY_STATUS_FAILED_UNKNOWN_MODE         = 0x008D,
-	SL_PUB_KEY_EXCHANGE_STATUS_SUCCESS            = 0x009E,
-	SL_PUB_KEY_EXCHANGE_STATUS_FAILED             = 0x00AF,
-	PREVENT_ROLLBACK_CNF_SUCCESS                  = 0x1234,
-	PREVENT_ROLLBACK_CNF_WRONG_MAGIC_WORD         = 0x1256
-};
+#define HIF_STATUS_SUCCESS                         (cpu_to_le32(0x0000))
+#define HIF_STATUS_FAIL                            (cpu_to_le32(0x0001))
+#define HIF_STATUS_INVALID_PARAMETER               (cpu_to_le32(0x0002))
+#define HIF_STATUS_WARNING                         (cpu_to_le32(0x0003))
+#define HIF_STATUS_UNKNOWN_REQUEST                 (cpu_to_le32(0x0004))
+#define HIF_STATUS_RX_FAIL_DECRYPT                 (cpu_to_le32(0x0010))
+#define HIF_STATUS_RX_FAIL_MIC                     (cpu_to_le32(0x0011))
+#define HIF_STATUS_RX_FAIL_NO_KEY                  (cpu_to_le32(0x0012))
+#define HIF_STATUS_TX_FAIL_RETRIES                 (cpu_to_le32(0x0013))
+#define HIF_STATUS_TX_FAIL_TIMEOUT                 (cpu_to_le32(0x0014))
+#define HIF_STATUS_TX_FAIL_REQUEUE                 (cpu_to_le32(0x0015))
+#define HIF_STATUS_REFUSED                         (cpu_to_le32(0x0016))
+#define HIF_STATUS_BUSY                            (cpu_to_le32(0x0017))
+#define HIF_STATUS_SLK_SET_KEY_SUCCESS             (cpu_to_le32(0x005A))
+#define HIF_STATUS_SLK_SET_KEY_ALREADY_BURNED      (cpu_to_le32(0x006B))
+#define HIF_STATUS_SLK_SET_KEY_DISALLOWED_MODE     (cpu_to_le32(0x007C))
+#define HIF_STATUS_SLK_SET_KEY_UNKNOWN_MODE        (cpu_to_le32(0x008D))
+#define HIF_STATUS_SLK_NEGO_SUCCESS                (cpu_to_le32(0x009E))
+#define HIF_STATUS_SLK_NEGO_FAILED                 (cpu_to_le32(0x00AF))
+#define HIF_STATUS_ROLLBACK_SUCCESS                (cpu_to_le32(0x1234))
+#define HIF_STATUS_ROLLBACK_FAIL                   (cpu_to_le32(0x1256))
 
 enum hif_api_rate_index {
 	API_RATE_INDEX_B_1MBPS     = 0,
diff --git a/drivers/staging/wfx/hif_rx.c b/drivers/staging/wfx/hif_rx.c
index 36132909a6ae..88466063cc42 100644
--- a/drivers/staging/wfx/hif_rx.c
+++ b/drivers/staging/wfx/hif_rx.c
@@ -127,7 +127,7 @@ static int hif_keys_indication(struct wfx_dev *wdev,
 	u8 pubkey[API_NCP_PUB_KEY_SIZE];
 
 	// SL_PUB_KEY_EXCHANGE_STATUS_SUCCESS is used by legacy secure link
-	if (body->status && body->status != SL_PUB_KEY_EXCHANGE_STATUS_SUCCESS)
+	if (body->status && body->status != HIF_STATUS_SLK_NEGO_SUCCESS)
 		dev_warn(wdev->dev, "secure link negociation error\n");
 	memcpy(pubkey, body->ncp_pub_key, sizeof(pubkey));
 	memreverse(pubkey, sizeof(pubkey));
diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index 490a9de54faf..bb776ee6689c 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -511,7 +511,7 @@ int hif_sl_send_pub_keys(struct wfx_dev *wdev,
 	ret = wfx_cmd_send(wdev, hif, NULL, 0, false);
 	kfree(hif);
 	// Compatibility with legacy secure link
-	if (ret == SL_PUB_KEY_EXCHANGE_STATUS_SUCCESS)
+	if (ret == le32_to_cpu(HIF_STATUS_SLK_NEGO_SUCCESS))
 		ret = 0;
 	return ret;
 }
@@ -542,7 +542,7 @@ int hif_sl_set_mac_key(struct wfx_dev *wdev, const u8 *slk_key, int destination)
 	ret = wfx_cmd_send(wdev, hif, NULL, 0, false);
 	kfree(hif);
 	// Compatibility with legacy secure link
-	if (ret == SL_MAC_KEY_STATUS_SUCCESS)
+	if (ret == le32_to_cpu(HIF_STATUS_SLK_SET_KEY_SUCCESS))
 		ret = 0;
 	return ret;
 }
diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
index 25d70ebe9933..d4e69c663f5a 100644
--- a/drivers/staging/wfx/main.c
+++ b/drivers/staging/wfx/main.c
@@ -229,7 +229,7 @@ int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len)
 			buf[i] = '}';
 			ret = hif_configuration(wdev, buf + start,
 						i - start + 1);
-			if (ret == HIF_STATUS_FAILURE) {
+			if (ret > 0) {
 				dev_err(wdev->dev, "PDS bytes %d to %d: invalid data (unsupported options?)\n", start, i);
 				return -EINVAL;
 			}
diff --git a/drivers/staging/wfx/traces.h b/drivers/staging/wfx/traces.h
index 7298fb948f56..c10ac92b8eb3 100644
--- a/drivers/staging/wfx/traces.h
+++ b/drivers/staging/wfx/traces.h
@@ -414,7 +414,7 @@ TRACE_EVENT(tx_stats,
 			__entry->flags |= 0x10;
 		if (tx_cnf->status)
 			__entry->flags |= 0x20;
-		if (tx_cnf->status == HIF_REQUEUE)
+		if (tx_cnf->status == HIF_STATUS_TX_FAIL_REQUEUE)
 			__entry->flags |= 0x40;
 	),
 	TP_printk("packet ID: %08x, rate policy: %s %d|%d %d|%d %d|%d %d|%d -> %d attempt, Delays media/queue/total: %4dus/%4dus/%4dus",
-- 
2.26.2

[PATCH v2 15/17] staging: wfx: fix endianness of the field 'num_tx_confs'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The field 'num_tx_confs' from the struct hif_cnf_multi_transmit is a
__le32. Sparse complains this field is not always correctly accessed:

    drivers/staging/wfx/hif_rx.c:82:9: warning: restricted __le32 degrades to integer
    drivers/staging/wfx/hif_rx.c:87:29: warning: restricted __le32 degrades to integer

However, the value of num_tx_confs cannot be greater than 15. So, we
only have to access to the least significant byte. It is finally easier
to declare it as an array of bytes and only access to the first one.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/bh.c          | 2 +-
 drivers/staging/wfx/hif_api_cmd.h | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/bh.c b/drivers/staging/wfx/bh.c
index 6c6e29cb7dcf..1cbaf8bb4fa3 100644
--- a/drivers/staging/wfx/bh.c
+++ b/drivers/staging/wfx/bh.c
@@ -102,7 +102,7 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
 	if (!(hif->id & HIF_ID_IS_INDICATION)) {
 		(*is_cnf)++;
 		if (hif->id == HIF_CNF_ID_MULTI_TRANSMIT)
-			release_count = le32_to_cpu(((struct hif_cnf_multi_transmit *)hif->body)->num_tx_confs);
+			release_count = ((struct hif_cnf_multi_transmit *)hif->body)->num_tx_confs;
 		else
 			release_count = 1;
 		WARN(wdev->hif.tx_buffers_used < release_count, "corrupted buffer counter");
diff --git a/drivers/staging/wfx/hif_api_cmd.h b/drivers/staging/wfx/hif_api_cmd.h
index d76722bff7ee..8c48477e8797 100644
--- a/drivers/staging/wfx/hif_api_cmd.h
+++ b/drivers/staging/wfx/hif_api_cmd.h
@@ -280,7 +280,8 @@ struct hif_cnf_tx {
 } __packed;
 
 struct hif_cnf_multi_transmit {
-	__le32 num_tx_confs;
+	u8     num_tx_confs;
+	u8     reserved[3];
 	struct hif_cnf_tx   tx_conf_payload[];
 } __packed;
 
-- 
2.26.2

[PATCH v2 16/17] staging: wfx: fix endianness of the field 'channel_number'

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

The field 'channel_number' from the structs hif_ind_rx and hif_req_start
is a __le32. Sparse complains this field is not always correctly
accessed:

    drivers/staging/wfx/data_rx.c:95:55: warning: incorrect type in argument 1 (different base types)
    drivers/staging/wfx/data_rx.c:95:55:    expected int chan
    drivers/staging/wfx/data_rx.c:95:55:    got restricted __le16 const [usertype] channel_number

However, the value of channel_number cannot be greater than 14 (this
device only support 2.4Ghz band). So, we only have to access to the
least significant byte. It is finally easier to declare it as an array
of bytes and only access to the first one.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/hif_api_cmd.h | 15 +++++++++------
 drivers/staging/wfx/hif_tx.c      |  4 ++--
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/wfx/hif_api_cmd.h b/drivers/staging/wfx/hif_api_cmd.h
index 8c48477e8797..21cde19cff75 100644
--- a/drivers/staging/wfx/hif_api_cmd.h
+++ b/drivers/staging/wfx/hif_api_cmd.h
@@ -321,7 +321,8 @@ struct hif_rx_flags {
 
 struct hif_ind_rx {
 	__le32 status;
-	__le16 channel_number;
+	u8     channel_number;
+	u8     reserved;
 	u8     rxed_rate;
 	u8     rcpi_rssi;
 	struct hif_rx_flags rx_flags;
@@ -356,7 +357,8 @@ struct hif_req_join {
 	u8     infrastructure_bss_mode:1;
 	u8     reserved1:7;
 	u8     band;
-	__le16 channel_number;
+	u8     channel_number;
+	u8     reserved;
 	u8     bssid[ETH_ALEN];
 	__le16 atim_window;
 	u8     short_preamble:1;
@@ -421,13 +423,14 @@ struct hif_ind_set_pm_mode_cmpl {
 struct hif_req_start {
 	u8     mode;
 	u8     band;
-	__le16 channel_number;
-	__le32 reserved1;
+	u8     channel_number;
+	u8     reserved1;
+	__le32 reserved2;
 	__le32 beacon_interval;
 	u8     dtim_period;
 	u8     short_preamble:1;
-	u8     reserved2:7;
-	u8     reserved3;
+	u8     reserved3:7;
+	u8     reserved4;
 	u8     ssid_length;
 	u8     ssid[HIF_API_SSID_SIZE];
 	__le32 basic_rate_set;
diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index bb776ee6689c..7f459719e7b4 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -309,7 +309,7 @@ int hif_join(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
 		body->probe_for_join = 0;
 	else
 		body->probe_for_join = 1;
-	body->channel_number = cpu_to_le16(channel->hw_value);
+	body->channel_number = channel->hw_value;
 	body->beacon_interval = cpu_to_le32(conf->beacon_int);
 	body->basic_rate_set =
 		cpu_to_le32(wfx_rate_mask_to_hw(wvif->wdev, conf->basic_rates));
@@ -435,7 +435,7 @@ int hif_start(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
 	WARN_ON(!conf->beacon_int);
 	body->dtim_period = conf->dtim_period;
 	body->short_preamble = conf->use_short_preamble;
-	body->channel_number = cpu_to_le16(channel->hw_value);
+	body->channel_number = channel->hw_value;
 	body->beacon_interval = cpu_to_le32(conf->beacon_int);
 	body->basic_rate_set =
 		cpu_to_le32(wfx_rate_mask_to_hw(wvif->wdev, conf->basic_rates));
-- 
2.26.2

[PATCH v2 17/17] staging: wfx: update TODO

[Jerome Pouiller]

From: Jérôme Pouiller <jerome.pouiller@silabs.com>

Update the TODO list associated to the wfx driver with the last
progresses.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/TODO | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/staging/wfx/TODO b/drivers/staging/wfx/TODO
index fca3332e42ce..42bf36d43970 100644
--- a/drivers/staging/wfx/TODO
+++ b/drivers/staging/wfx/TODO
@@ -3,32 +3,13 @@ staging directory.
 
   - The HIF API is not yet clean enough.
 
-  - Fix support for big endian architectures. See:
-       https://lore.kernel.org/lkml/20191111202852.GX26530@ZenIV.linux.org.uk
-
-  - The pointers returned by allocation functions are always checked.
-
   - The code that check the corectness of received message (in rx_helper()) can
     be improved. See:
        https://lore.kernel.org/driverdev-devel/2302785.6C7ODC2LYm@pc-42/
 
-  - Support for SDIO with external IRQ is broken.
-
   - As suggested by Felix, rate control could be improved following this idea:
         https://lore.kernel.org/lkml/3099559.gv3Q75KnN1@pc-42/
 
-  - When driver is about to loose BSS, it forge its own Null Func request (see
-    wfx_cqm_bssloss_sm()). It should use mechanism provided by mac80211.
-
-  - Monitoring mode is not implemented despite being mandatory by mac80211.
-
-  - The "state" field from wfx_vif should be replaced by "vif->type".
-
-  - It seems that wfx_upload_keys() is useless.
-
-  - "event_queue" from wfx_vif seems overkill. These event are rare and they
-     probably could be handled in a simpler fashion.
-
   - Feature called "secure link" should be either developed (using kernel
     crypto API) or dropped.
 
-- 
2.26.2