2024-03-15 05:52:41

by Li Zhijian

Subject: [PATCH v2 2/3] wifi: b43: Convert sprintf/snprintf to sysfs_emit

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() will be converted as weel if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Larry Finger <[email protected]>
CC: Kalle Valo <[email protected]>
CC: [email protected]
CC: [email protected]
Acked-by: Larry Finger <[email protected]>
Signed-off-by: Li Zhijian <[email protected]>
---
V2:
subject updated and wrap line style

This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/[email protected]/
---
drivers/net/wireless/broadcom/b43/sysfs.c | 13 ++++---------
drivers/net/wireless/broadcom/b43legacy/sysfs.c | 16 ++++++----------
2 files changed, 10 insertions(+), 19 deletions(-)

diff --git a/drivers/net/wireless/broadcom/b43/sysfs.c b/drivers/net/wireless/broadcom/b43/sysfs.c
index 0679d132968f..261b2b746a9c 100644
--- a/drivers/net/wireless/broadcom/b43/sysfs.c
+++ b/drivers/net/wireless/broadcom/b43/sysfs.c
@@ -53,19 +53,14 @@ static ssize_t b43_attr_interfmode_show(struct device *dev,

switch (wldev->phy.g->interfmode) {
case B43_INTERFMODE_NONE:
- count =
- snprintf(buf, PAGE_SIZE,
- "0 (No Interference Mitigation)\n");
+ count = sysfs_emit(buf, "0 (No Interference Mitigation)\n");
break;
case B43_INTERFMODE_NONWLAN:
- count =
- snprintf(buf, PAGE_SIZE,
- "1 (Non-WLAN Interference Mitigation)\n");
+ count = sysfs_emit(buf,
+ "1 (Non-WLAN Interference Mitigation)\n");
break;
case B43_INTERFMODE_MANUALWLAN:
- count =
- snprintf(buf, PAGE_SIZE,
- "2 (WLAN Interference Mitigation)\n");
+ count = sysfs_emit(buf, "2 (WLAN Interference Mitigation)\n");
break;
default:
B43_WARN_ON(1);
diff --git a/drivers/net/wireless/broadcom/b43legacy/sysfs.c b/drivers/net/wireless/broadcom/b43legacy/sysfs.c
index eec087ca30e6..d988fe541bf7 100644
--- a/drivers/net/wireless/broadcom/b43legacy/sysfs.c
+++ b/drivers/net/wireless/broadcom/b43legacy/sysfs.c
@@ -75,16 +75,14 @@ static ssize_t b43legacy_attr_interfmode_show(struct device *dev,

switch (wldev->phy.interfmode) {
case B43legacy_INTERFMODE_NONE:
- count = snprintf(buf, PAGE_SIZE, "0 (No Interference"
- " Mitigation)\n");
+ count = sysfs_emit(buf, "0 (No Interference Mitigation)\n");
break;
case B43legacy_INTERFMODE_NONWLAN:
- count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference"
- " Mitigation)\n");
+ count = sysfs_emit(buf,
+ "1 (Non-WLAN Interference Mitigation)\n");
break;
case B43legacy_INTERFMODE_MANUALWLAN:
- count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference"
- " Mitigation)\n");
+ count = sysfs_emit(buf, "2 (WLAN Interference Mitigation)\n");
break;
default:
B43legacy_WARN_ON(1);
@@ -155,11 +153,9 @@ static ssize_t b43legacy_attr_preamble_show(struct device *dev,
mutex_lock(&wldev->wl->mutex);

if (wldev->short_preamble)
- count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble"
- " enabled)\n");
+ count = sysfs_emit(buf, "1 (Short Preamble enabled)\n");
else
- count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble"
- " disabled)\n");
+ count = sysfs_emit(buf, "0 (Short Preamble disabled)\n");

mutex_unlock(&wldev->wl->mutex);

--
2.29.2

2024-03-21 15:08:14

by Kalle Valo

Subject: Re: [PATCH v2 2/3] wifi: b43: Convert sprintf/snprintf to sysfs_emit

Li Zhijian <[email protected]> wrote:

> Per filesystems/sysfs.rst, show() should only use sysfs_emit()
> or sysfs_emit_at() when formatting the value to be returned to user space.
>
> coccinelle complains that there are still a couple of functions that use
> snprintf(). Convert them to sysfs_emit().
>
> sprintf() will be converted as weel if they have.
>
> Generally, this patch is generated by
> make coccicheck M=<path/to/file> MODE=patch \
> COCCI=scripts/coccinelle/api/device_attr_show.cocci
>
> No functional change intended
>
> CC: Larry Finger <[email protected]>
> CC: Kalle Valo <[email protected]>
> CC: [email protected]
> CC: [email protected]
> Acked-by: Larry Finger <[email protected]>
> Signed-off-by: Li Zhijian <[email protected]>

2 patches applied to wireless-next.git, thanks.

6db5c15c8b6a wifi: b43: Convert sprintf/snprintf to sysfs_emit
48be5774b21b wifi: ti: Convert sprintf/snprintf to sysfs_emit

--
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches