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

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Date:   Mon, 2 Sep 2019 17:08:09 +0800
From:   <max.chou@...ltek.com>
To:     <marcel@...tmann.org>, <johan.hedberg@...il.com>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <alex_lu@...lsil.com.cn>, <max.chou@...ltek.com>
Subject: [PATCH] Bluetooth: btrtl: Fix an issue that failing to download the FW which size is over 32K bytes

From: Max Chou <max.chou@...ltek.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@...ltek.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