Commit [3469adb3: fix potential NULL pointer dereference] introduced
a check of msg_ind allocation, but omitted allocation of msg_ind->msg.
Moreover, it introduced two if statements, which looked a bit clunky.
This commit moves allocation code outside of the critical section so
there's no need to dance around mutex_unlock, and adds the missing
allocation check.
Signed-off-by: Michal Nazarewicz <min...@mina86.com>
---
drivers/net/wireless/ath/wcn36xx/smd.c | 32 +++++++++++++++++++-------------
1 file changed, 19 insertions(+), 13 deletions(-)
On Wed, Dec 11 2013, John W. Linville wrote:
> Missing Signed-off-by...
Sorry about that.
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c
b/drivers/net/wireless/ath/wcn36xx/smd.c
index 8f37562..750626b 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2060,22 +2060,28 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx
*wcn, void *buf, size_t len)
case WCN36XX_HAL_OTA_TX_COMPL_IND:
case WCN36XX_HAL_MISSED_BEACON_IND:
case WCN36XX_HAL_DELETE_STA_CONTEXT_IND:
- mutex_lock(&wcn->hal_ind_mutex);
msg_ind = kmalloc(sizeof(*msg_ind), GFP_KERNEL);
- if (msg_ind) {
- msg_ind->msg_len = len;
- msg_ind->msg = kmalloc(len, GFP_KERNEL);
- memcpy(msg_ind->msg, buf, len);
- list_add_tail(&msg_ind->list, &wcn->hal_ind_queue);
- queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work);
- wcn36xx_dbg(WCN36XX_DBG_HAL, "indication arrived\n");
+ if (!msg_ind)
+ goto nomem;
+ msg_ind->msg_len = len;
+ msg_ind->msg = kmalloc(len, GFP_KERNEL);
+ if (!msg_ind->msg) {
+ kfree(msg_ind);
+nomem:
+ /*
+ * FIXME: Do something smarter then just
+ * printing an error.
+ */
+ wcn36xx_err("Run out of memory while handling SMD_EVENT
(%d)\n",
+ msg_header->msg_type);
+ break;
}
+ memcpy(msg_ind->msg, buf, len);
+ mutex_lock(&wcn->hal_ind_mutex);
+ list_add_tail(&msg_ind->list, &wcn->hal_ind_queue);
+ queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work);
mutex_unlock(&wcn->hal_ind_mutex);
- if (msg_ind)
- break;
- /* FIXME: Do something smarter then just printing an error. */
- wcn36xx_err("Run out of memory while handling SMD_EVENT (%d)\n",
- msg_header->msg_type);
+ wcn36xx_dbg(WCN36XX_DBG_HAL, "indication arrived\n");
break;
default:
wcn36xx_err("SMD_EVENT (%d) not supported\n",
--
1.8.4
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