[PATCH] Bluetooth: btrtl: Fix an issue that failing to download the FW which size is over 32K bytes

[PATCH] Bluetooth: btrtl: Fix an issue that failing to download the FW which size is over 32K bytes

[max.chou]

From: Max Chou <max.chou@realtek.com>

Fix the issue that when the FW size is 32K+, it will fail for the download
process because of the incorrect index.

When firmware patch length is over 32K, "dl_cmd->index" may >= 0x80. It
will be thought as "data end" that download process will not complete.
However, driver should recount the index from 1.

Signed-off-by: Max Chou <max.chou@realtek.com>
---
 drivers/bluetooth/btrtl.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 0354e93e7a7c..bf3c02be6930 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -401,7 +401,11 @@ static int rtl_download_firmware(struct hci_dev *hdev,
 
 		BT_DBG("download fw (%d/%d)", i, frag_num);
 
-		dl_cmd->index = i;
+		if (i > 0x7f)
+			dl_cmd->index = (i & 0x7f) + 1;
+		else
+			dl_cmd->index = i;
+
 		if (i == (frag_num - 1)) {
 			dl_cmd->index |= 0x80; /* data end */
 			frag_len = fw_len % RTL_FRAG_LEN;
-- 
2.17.1

[PATCH] Bluetooth: btrtl: Fix an issue that failing to download the FW which size is over 32K bytes

[max.chou]

From: Max Chou <max.chou@realtek.com>

Fix the issue that when the FW size is 32K+, it will fail for the download
process because of the incorrect index.

Signed-off-by: Max Chou <max.chou@realtek.com>
---
 drivers/bluetooth/btrtl.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 0354e93e7a7c..215896af0259 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -389,6 +389,7 @@ static int rtl_download_firmware(struct hci_dev *hdev,
 	int frag_len = RTL_FRAG_LEN;
 	int ret = 0;
 	int i;
+	int j;
 	struct sk_buff *skb;
 	struct hci_rp_read_local_version *rp;
 
@@ -401,7 +402,12 @@ static int rtl_download_firmware(struct hci_dev *hdev,
 
 		BT_DBG("download fw (%d/%d)", i, frag_num);
 
-		dl_cmd->index = i;
+		if (i > 0x7f)
+			j = (i & 0x7f) + 1;
+		else
+			j = i;
+
+		dl_cmd->index = j;
 		if (i == (frag_num - 1)) {
 			dl_cmd->index |= 0x80; /* data end */
 			frag_len = fw_len % RTL_FRAG_LEN;
-- 
2.17.1

Re: [PATCH] Bluetooth: btrtl: Fix an issue that failing to download the FW which size is over 32K bytes

[Marcel Holtmann]

Hi Max,

> Fix the issue that when the FW size is 32K+, it will fail for the download
> process because of the incorrect index.
> 
> Signed-off-by: Max Chou <max.chou@realtek.com>
> ---
> drivers/bluetooth/btrtl.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
> index 0354e93e7a7c..215896af0259 100644
> --- a/drivers/bluetooth/btrtl.c
> +++ b/drivers/bluetooth/btrtl.c
> @@ -389,6 +389,7 @@ static int rtl_download_firmware(struct hci_dev *hdev,
> 	int frag_len = RTL_FRAG_LEN;
> 	int ret = 0;
> 	int i;
> +	int j;
> 	struct sk_buff *skb;
> 	struct hci_rp_read_local_version *rp;
> 
> @@ -401,7 +402,12 @@ static int rtl_download_firmware(struct hci_dev *hdev,
> 
> 		BT_DBG("download fw (%d/%d)", i, frag_num);
> 
> -		dl_cmd->index = i;
> +		if (i > 0x7f)
> +			j = (i & 0x7f) + 1;
> +		else
> +			j = i;
> +
> +		dl_cmd->index = j;

so this seems rather complicated with the extra variable.

		if (i > 0x7f)
			dl_cmd->index = (i & 0x7f) + 1;
		else
			dl_cmd->index = i;

And I would prefer to have a small comment above on why this is done this way.

Regards

Marcel