From: Markus Elfring <[email protected]>
Date: Sat, 10 Mar 2018 22:25:45 +0100
Three update suggestions were taken into account
from static source code analysis.
Markus Elfring (3):
Delete an unnecessary variable initialisation
Return directly after a failed kzalloc()
Use common error handling code
drivers/net/wireless/ti/wlcore/acx.c | 33 ++++++++++++++-------------------
1 file changed, 14 insertions(+), 19 deletions(-)
--
2.16.2
From: Markus Elfring <[email protected]>
Date: Sat, 10 Mar 2018 21:51:17 +0100
The local variable "ret" will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <[email protected]>
---
drivers/net/wireless/ti/wlcore/acx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ti/wlcore/acx.c b/drivers/net/wireless/ti/wlcore/acx.c
index 3ca9167d6146..6991fee8fe61 100644
--- a/drivers/net/wireless/ti/wlcore/acx.c
+++ b/drivers/net/wireless/ti/wlcore/acx.c
@@ -738,7 +738,7 @@ int wl1271_acx_sta_rate_policies(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
struct acx_rate_policy *acx;
struct conf_tx_rate_class *c = &wl->conf.tx.sta_rc_conf;
- int ret = 0;
+ int ret;
wl1271_debug(DEBUG_ACX, "acx rate policies");
--
2.16.2
From: Markus Elfring <[email protected]>
Date: Sat, 10 Mar 2018 22:00:31 +0100
Return directly after a call of the function "kzalloc" failed
at the beginning.
Signed-off-by: Markus Elfring <[email protected]>
---
drivers/net/wireless/ti/wlcore/acx.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/ti/wlcore/acx.c b/drivers/net/wireless/ti/wlcore/acx.c
index 6991fee8fe61..1cc5bba670e1 100644
--- a/drivers/net/wireless/ti/wlcore/acx.c
+++ b/drivers/net/wireless/ti/wlcore/acx.c
@@ -743,11 +743,8 @@ int wl1271_acx_sta_rate_policies(struct wl1271 *wl, struct wl12xx_vif *wlvif)
wl1271_debug(DEBUG_ACX, "acx rate policies");
acx = kzalloc(sizeof(*acx), GFP_KERNEL);
-
- if (!acx) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!acx)
+ return -ENOMEM;
wl1271_debug(DEBUG_ACX, "basic_rate: 0x%x, full_rate: 0x%x",
wlvif->basic_rate, wlvif->rate_set);
--
2.16.2
From: Markus Elfring <[email protected]>
Date: Sat, 10 Mar 2018 22:18:45 +0100
Add a jump target so that a bit of exception handling can be better reused
at the end of this function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <[email protected]>
---
drivers/net/wireless/ti/wlcore/acx.c | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/drivers/net/wireless/ti/wlcore/acx.c b/drivers/net/wireless/ti/wlcore/acx.c
index 1cc5bba670e1..7d37a417c756 100644
--- a/drivers/net/wireless/ti/wlcore/acx.c
+++ b/drivers/net/wireless/ti/wlcore/acx.c
@@ -757,10 +757,8 @@ int wl1271_acx_sta_rate_policies(struct wl1271 *wl, struct wl12xx_vif *wlvif)
acx->rate_policy.aflags = c->aflags;
ret = wl1271_cmd_configure(wl, ACX_RATE_POLICY, acx, sizeof(*acx));
- if (ret < 0) {
- wl1271_warning("Setting of rate policies failed: %d", ret);
- goto out;
- }
+ if (ret < 0)
+ goto report_failure;
/* configure one AP supported rate class */
acx->rate_policy_idx = cpu_to_le32(wlvif->sta.ap_rate_idx);
@@ -773,10 +771,8 @@ int wl1271_acx_sta_rate_policies(struct wl1271 *wl, struct wl12xx_vif *wlvif)
acx->rate_policy.aflags = c->aflags;
ret = wl1271_cmd_configure(wl, ACX_RATE_POLICY, acx, sizeof(*acx));
- if (ret < 0) {
- wl1271_warning("Setting of rate policies failed: %d", ret);
- goto out;
- }
+ if (ret < 0)
+ goto report_failure;
/*
* configure one rate class for basic p2p operations.
@@ -791,14 +787,16 @@ int wl1271_acx_sta_rate_policies(struct wl1271 *wl, struct wl12xx_vif *wlvif)
acx->rate_policy.aflags = c->aflags;
ret = wl1271_cmd_configure(wl, ACX_RATE_POLICY, acx, sizeof(*acx));
- if (ret < 0) {
- wl1271_warning("Setting of rate policies failed: %d", ret);
- goto out;
- }
+ if (ret < 0)
+ goto report_failure;
-out:
+free_acx:
kfree(acx);
return ret;
+
+report_failure:
+ wl1271_warning("Setting of rate policies failed: %d", ret);
+ goto free_acx;
}
int wl1271_acx_ap_rate_policy(struct wl1271 *wl, struct conf_tx_rate_class *c,
--
2.16.2
On 3/10/2018 10:33 PM, SF Markus Elfring wrote:
> From: Markus Elfring <[email protected]>
> Date: Sat, 10 Mar 2018 22:18:45 +0100
>
> Add a jump target so that a bit of exception handling can be better reused
> at the end of this function.
>
> This issue was detected by using the Coccinelle software.
You call this an issue?
> Signed-off-by: Markus Elfring <[email protected]>
> ---
> drivers/net/wireless/ti/wlcore/acx.c | 24 +++++++++++-------------
> 1 file changed, 11 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/net/wireless/ti/wlcore/acx.c b/drivers/net/wireless/ti/wlcore/acx.c
> index 1cc5bba670e1..7d37a417c756 100644
> --- a/drivers/net/wireless/ti/wlcore/acx.c
> +++ b/drivers/net/wireless/ti/wlcore/acx.c
[...]
> ret = wl1271_cmd_configure(wl, ACX_RATE_POLICY, acx, sizeof(*acx));
> - if (ret < 0) {
> - wl1271_warning("Setting of rate policies failed: %d", ret);
> - goto out;
> - }
> + if (ret < 0)
> + goto report_failure;
>
> -out:
> +free_acx:
> kfree(acx);
> return ret;
> +
> +report_failure:
> + wl1271_warning("Setting of rate policies failed: %d", ret);
> + goto free_acx;
In my opinion you are introducing a new issue. I don't call this
"common" in any way. It is leaning more towards "spaghetti code" [1].
Jumping over a label to return to it with another jump. They are not
long jumps, but it sure does not make thing more readable. Always aim
for simple top-to-bottom.
Regards,
Arend
[1] https://en.wikipedia.org/wiki/Spaghetti_code
> }
>
> int wl1271_acx_ap_rate_policy(struct wl1271 *wl, struct conf_tx_rate_class *c,
>