[PATCH AUTOSEL 4.19 024/671] cfg80211: regulatory: make initialization more robust

[PATCH AUTOSEL 4.19 024/671] cfg80211: regulatory: make initialization more robust

[Sasha Levin]

From: Johannes Berg <johannes.berg@intel.com>

[ Upstream commit 71e5e886806ee3f8e0c44ed945eb2e4d6659c6e3 ]

Since my change to split out the regulatory init to occur later,
any issues during earlier cfg80211_init() or errors during the
platform device allocation would lead to crashes later. Make this
more robust by checking that the earlier initialization succeeded.

Fixes: d7be102f2945 ("cfg80211: initialize regulatory keys/database later")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/wireless/reg.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 64841238df85..5643bdee7198 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -3870,6 +3870,15 @@ static int __init regulatory_init_db(void)
 {
 	int err;
 
+	/*
+	 * It's possible that - due to other bugs/issues - cfg80211
+	 * never called regulatory_init() below, or that it failed;
+	 * in that case, don't try to do any further work here as
+	 * it's doomed to lead to crashes.
+	 */
+	if (IS_ERR_OR_NULL(reg_pdev))
+		return -EINVAL;
+
 	err = load_builtin_regdb_keys();
 	if (err)
 		return err;
-- 
2.20.1

[PATCH AUTOSEL 4.19 030/671] iwlwifi: nvm: get num of hw addresses from firmware

[Sasha Levin]

From: Naftali Goldstein <naftali.goldstein@intel.com>

[ Upstream commit e7eeee08434873c2f781dc1afaa42b03a014b95d ]

With NICs that don't read the NVM directly and instead rely on getting
the relevant data from the firmware, the number of reserved MAC
addresses was not added to the API. This caused the driver to assume
there is only one address which results in all interfaces getting the
same address. Update the API to fix this.

While at it, fix-up the comments with firmware api names to actually
match what we have in the firmware.

Fixes: e9e1ba3dbf00 ("iwlwifi: mvm: support getting nvm data from firmware")
Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/wireless/intel/iwlwifi/fw/api/nvm-reg.h    | 14 +++++++-------
 drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 10 +++++++++-
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h b/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
index 6c5338364794..d22c1eefba6a 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
@@ -165,7 +165,7 @@ struct iwl_nvm_access_resp {
  */
 struct iwl_nvm_get_info {
 	__le32 reserved;
-} __packed; /* GRP_REGULATORY_NVM_GET_INFO_CMD_S_VER_1 */
+} __packed; /* REGULATORY_NVM_GET_INFO_CMD_API_S_VER_1 */
 
 /**
  * enum iwl_nvm_info_general_flags - flags in NVM_GET_INFO resp
@@ -180,14 +180,14 @@ enum iwl_nvm_info_general_flags {
  * @flags: bit 0: 1 - empty, 0 - non-empty
  * @nvm_version: nvm version
  * @board_type: board type
- * @reserved: reserved
+ * @n_hw_addrs: number of reserved MAC addresses
  */
 struct iwl_nvm_get_info_general {
 	__le32 flags;
 	__le16 nvm_version;
 	u8 board_type;
-	u8 reserved;
-} __packed; /* GRP_REGULATORY_NVM_GET_INFO_GENERAL_S_VER_1 */
+	u8 n_hw_addrs;
+} __packed; /* REGULATORY_NVM_GET_INFO_GENERAL_S_VER_2 */
 
 /**
  * enum iwl_nvm_mac_sku_flags - flags in &iwl_nvm_get_info_sku
@@ -231,7 +231,7 @@ struct iwl_nvm_get_info_sku {
 struct iwl_nvm_get_info_phy {
 	__le32 tx_chains;
 	__le32 rx_chains;
-} __packed; /* GRP_REGULATORY_NVM_GET_INFO_PHY_SKU_SECTION_S_VER_1 */
+} __packed; /* REGULATORY_NVM_GET_INFO_PHY_SKU_SECTION_S_VER_1 */
 
 #define IWL_NUM_CHANNELS (51)
 
@@ -245,7 +245,7 @@ struct iwl_nvm_get_info_regulatory {
 	__le32 lar_enabled;
 	__le16 channel_profile[IWL_NUM_CHANNELS];
 	__le16 reserved;
-} __packed; /* GRP_REGULATORY_NVM_GET_INFO_REGULATORY_S_VER_1 */
+} __packed; /* REGULATORY_NVM_GET_INFO_REGULATORY_S_VER_1 */
 
 /**
  * struct iwl_nvm_get_info_rsp - response to get NVM data
@@ -259,7 +259,7 @@ struct iwl_nvm_get_info_rsp {
 	struct iwl_nvm_get_info_sku mac_sku;
 	struct iwl_nvm_get_info_phy phy_sku;
 	struct iwl_nvm_get_info_regulatory regulatory;
-} __packed; /* GRP_REGULATORY_NVM_GET_INFO_CMD_RSP_S_VER_2 */
+} __packed; /* REGULATORY_NVM_GET_INFO_RSP_API_S_VER_3 */
 
 /**
  * struct iwl_nvm_access_complete_cmd - NVM_ACCESS commands are completed
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index 73969dbeb5c5..b850cca9853c 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -1315,6 +1315,7 @@ struct iwl_nvm_data *iwl_get_nvm(struct iwl_trans *trans,
 	bool lar_fw_supported = !iwlwifi_mod_params.lar_disable &&
 				fw_has_capa(&fw->ucode_capa,
 					    IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
+	bool empty_otp;
 	u32 mac_flags;
 	u32 sbands_flags = 0;
 
@@ -1330,7 +1331,9 @@ struct iwl_nvm_data *iwl_get_nvm(struct iwl_trans *trans,
 	}
 
 	rsp = (void *)hcmd.resp_pkt->data;
-	if (le32_to_cpu(rsp->general.flags) & NVM_GENERAL_FLAGS_EMPTY_OTP)
+	empty_otp = !!(le32_to_cpu(rsp->general.flags) &
+		       NVM_GENERAL_FLAGS_EMPTY_OTP);
+	if (empty_otp)
 		IWL_INFO(trans, "OTP is empty\n");
 
 	nvm = kzalloc(sizeof(*nvm) +
@@ -1354,6 +1357,11 @@ struct iwl_nvm_data *iwl_get_nvm(struct iwl_trans *trans,
 
 	/* Initialize general data */
 	nvm->nvm_version = le16_to_cpu(rsp->general.nvm_version);
+	nvm->n_hw_addrs = rsp->general.n_hw_addrs;
+	if (nvm->n_hw_addrs == 0)
+		IWL_WARN(trans,
+			 "Firmware declares no reserved mac addresses. OTP is empty: %d\n",
+			 empty_otp);
 
 	/* Initialize MAC sku data */
 	mac_flags = le32_to_cpu(rsp->mac_sku.mac_sku_flags);
-- 
2.20.1

[PATCH AUTOSEL 4.19 035/671] rtlwifi: rtl8821ae: replace _rtl8821ae_mrate_idx_to_arfr_id with generic version

[Sasha Levin]

From: Colin Ian King <colin.king@canonical.com>

[ Upstream commit c894696188d5c2af1e636e458190e80c53fb893d ]

Function _rtl8821ae_mrate_idx_to_arfr_id is functionally identical to
the generic version rtl_mrate_idx_to_arfr_id, so remove
_rtl8821ae_mrate_idx_to_arfr_id and use the generic one instead.

This also fixes a missing break statement found by CoverityScan in
_rtl8821ae_mrate_idx_to_arfr_id, namely: CID#1167237 ("Missing break
in switch")

Thanks to Joe Perches for spotting this when I submitted an earlier patch.

Fixes: 3c05bedb5fef ("Staging: rtl8812ae: Add Realtek 8821 PCI WIFI driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
ACKed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../wireless/realtek/rtlwifi/rtl8821ae/hw.c   | 71 +------------------
 1 file changed, 1 insertion(+), 70 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
index 317c1b3101da..ba258318ee9f 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
@@ -3404,75 +3404,6 @@ static void rtl8821ae_update_hal_rate_table(struct ieee80211_hw *hw,
 		 "%x\n", rtl_read_dword(rtlpriv, REG_ARFR0));
 }
 
-static u8 _rtl8821ae_mrate_idx_to_arfr_id(
-	struct ieee80211_hw *hw, u8 rate_index,
-	enum wireless_mode wirelessmode)
-{
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-	struct rtl_phy *rtlphy = &rtlpriv->phy;
-	u8 ret = 0;
-	switch (rate_index) {
-	case RATR_INX_WIRELESS_NGB:
-		if (rtlphy->rf_type == RF_1T1R)
-			ret = 1;
-		else
-			ret = 0;
-		; break;
-	case RATR_INX_WIRELESS_N:
-	case RATR_INX_WIRELESS_NG:
-		if (rtlphy->rf_type == RF_1T1R)
-			ret = 5;
-		else
-			ret = 4;
-		; break;
-	case RATR_INX_WIRELESS_NB:
-		if (rtlphy->rf_type == RF_1T1R)
-			ret = 3;
-		else
-			ret = 2;
-		; break;
-	case RATR_INX_WIRELESS_GB:
-		ret = 6;
-		break;
-	case RATR_INX_WIRELESS_G:
-		ret = 7;
-		break;
-	case RATR_INX_WIRELESS_B:
-		ret = 8;
-		break;
-	case RATR_INX_WIRELESS_MC:
-		if ((wirelessmode == WIRELESS_MODE_B)
-			|| (wirelessmode == WIRELESS_MODE_G)
-			|| (wirelessmode == WIRELESS_MODE_N_24G)
-			|| (wirelessmode == WIRELESS_MODE_AC_24G))
-			ret = 6;
-		else
-			ret = 7;
-	case RATR_INX_WIRELESS_AC_5N:
-		if (rtlphy->rf_type == RF_1T1R)
-			ret = 10;
-		else
-			ret = 9;
-		break;
-	case RATR_INX_WIRELESS_AC_24N:
-		if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_80) {
-			if (rtlphy->rf_type == RF_1T1R)
-				ret = 10;
-			else
-				ret = 9;
-		} else {
-			if (rtlphy->rf_type == RF_1T1R)
-				ret = 11;
-			else
-				ret = 12;
-		}
-		break;
-	default:
-		ret = 0; break;
-	}
-	return ret;
-}
-
 static u32 _rtl8821ae_rate_to_bitmap_2ssvht(__le16 vht_rate)
 {
 	u8 i, j, tmp_rate;
@@ -3761,7 +3692,7 @@ static void rtl8821ae_update_hal_rate_mask(struct ieee80211_hw *hw,
 		break;
 	}
 
-	ratr_index = _rtl8821ae_mrate_idx_to_arfr_id(hw, ratr_index, wirelessmode);
+	ratr_index = rtl_mrate_idx_to_arfr_id(hw, ratr_index, wirelessmode);
 	sta_entry->ratr_index = ratr_index;
 	ratr_bitmap = _rtl8821ae_set_ra_vht_ratr_bitmap(hw, wirelessmode,
 							ratr_bitmap);
-- 
2.20.1