[PATCH] net: wirelesse: wcn36xx: pull allocation outside of criticalsection

From: Michal Nazarewicz
Date: Sat Dec 07 2013 - 12:14:12 EST



This also simplifies flow-controll as there is now only one if
condition with a single branch.
---
drivers/net/wireless/ath/wcn36xx/smd.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)

On Thu, Dec 05 2013, Eugene Krasnikov <k.eugene.e@xxxxxxxxx> wrote:
> I think code will look neater if error case will be handled in "else"
> statement something like: [...]

How about the following:

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 823631c..ebab2db 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2056,22 +2056,24 @@ 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) {
+ /*
+ * 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;
}
+ mutex_lock(&wcn->hal_ind_mutex);
+ 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");
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);
break;
default:
wcn36xx_err("SMD_EVENT (%d) not supported\n",
--
1.8.4

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