* [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive()
@ 2026-02-05 8:40 Chen Ni
2026-02-24 14:51 ` Chen-Yu Tsai
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Chen Ni @ 2026-02-05 8:40 UTC (permalink / raw)
To: daniel.lezcano, tglx, wens, jernej.skrabec, samuel, p.zabel,
mripard, mans
Cc: linux-kernel, linux-arm-kernel, linux-sunxi, Chen Ni
The devm_reset_control_get_optional_exclusive() function may return an
ERR_PTR in case of genuine reset control acquisition errors, not just
NULL which indicates the legitimate absence of an optional reset.
Add an IS_ERR() check after the call in sun5i_timer_probe(). On error,
return the error code to ensure proper failure handling rather than
proceeding with invalid pointers.
Fixes: 7e5bac610d2f ("clocksource/drivers/sun5i: Convert to platform device driver")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
---
drivers/clocksource/timer-sun5i.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
index f827d3f98f60..d7e012992170 100644
--- a/drivers/clocksource/timer-sun5i.c
+++ b/drivers/clocksource/timer-sun5i.c
@@ -286,6 +286,9 @@ static int sun5i_timer_probe(struct platform_device *pdev)
}
rstc = devm_reset_control_get_optional_exclusive(dev, NULL);
+ if (IS_ERR(rstc))
+ return dev_err_probe(dev, PTR_ERR(rstc),
+ "failed to get reset\n");
if (rstc)
reset_control_deassert(rstc);
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive()
2026-02-05 8:40 [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive() Chen Ni
@ 2026-02-24 14:51 ` Chen-Yu Tsai
2026-03-04 19:35 ` Daniel Lezcano
2026-04-12 20:39 ` [tip: timers/clocksource] " tip-bot2 for Chen Ni
2 siblings, 0 replies; 4+ messages in thread
From: Chen-Yu Tsai @ 2026-02-24 14:51 UTC (permalink / raw)
To: Chen Ni
Cc: daniel.lezcano, tglx, jernej.skrabec, samuel, p.zabel, mripard,
mans, linux-kernel, linux-arm-kernel, linux-sunxi
On Thu, Feb 5, 2026 at 4:42 PM Chen Ni <nichen@iscas.ac.cn> wrote:
>
> The devm_reset_control_get_optional_exclusive() function may return an
> ERR_PTR in case of genuine reset control acquisition errors, not just
> NULL which indicates the legitimate absence of an optional reset.
>
> Add an IS_ERR() check after the call in sun5i_timer_probe(). On error,
> return the error code to ensure proper failure handling rather than
> proceeding with invalid pointers.
>
> Fixes: 7e5bac610d2f ("clocksource/drivers/sun5i: Convert to platform device driver")
> Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Acked-by: Chen-Yu Tsai <wens@kernel.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive()
2026-02-05 8:40 [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive() Chen Ni
2026-02-24 14:51 ` Chen-Yu Tsai
@ 2026-03-04 19:35 ` Daniel Lezcano
2026-04-12 20:39 ` [tip: timers/clocksource] " tip-bot2 for Chen Ni
2 siblings, 0 replies; 4+ messages in thread
From: Daniel Lezcano @ 2026-03-04 19:35 UTC (permalink / raw)
To: Chen Ni
Cc: daniel.lezcano, tglx, wens, jernej.skrabec, samuel, p.zabel,
mripard, mans, linux-kernel, linux-arm-kernel, linux-sunxi
On Thu, Feb 05, 2026 at 04:40:37PM +0800, Chen Ni wrote:
> The devm_reset_control_get_optional_exclusive() function may return an
> ERR_PTR in case of genuine reset control acquisition errors, not just
> NULL which indicates the legitimate absence of an optional reset.
>
> Add an IS_ERR() check after the call in sun5i_timer_probe(). On error,
> return the error code to ensure proper failure handling rather than
> proceeding with invalid pointers.
>
> Fixes: 7e5bac610d2f ("clocksource/drivers/sun5i: Convert to platform device driver")
> Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
> ---
Applied, thanks
^ permalink raw reply [flat|nested] 4+ messages in thread
* [tip: timers/clocksource] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive()
2026-02-05 8:40 [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive() Chen Ni
2026-02-24 14:51 ` Chen-Yu Tsai
2026-03-04 19:35 ` Daniel Lezcano
@ 2026-04-12 20:39 ` tip-bot2 for Chen Ni
2 siblings, 0 replies; 4+ messages in thread
From: tip-bot2 for Chen Ni @ 2026-04-12 20:39 UTC (permalink / raw)
To: linux-tip-commits
Cc: Chen Ni, Daniel Lezcano, Chen-Yu Tsai, x86, linux-kernel
The following commit has been merged into the timers/clocksource branch of tip:
Commit-ID: fed9f727cc3f91dde8278961269419083502b40e
Gitweb: https://git.kernel.org/tip/fed9f727cc3f91dde8278961269419083502b40e
Author: Chen Ni <nichen@iscas.ac.cn>
AuthorDate: Thu, 05 Feb 2026 16:40:37 +08:00
Committer: Daniel Lezcano <daniel.lezcano@kernel.org>
CommitterDate: Tue, 24 Mar 2026 18:30:44 +01:00
clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive()
The devm_reset_control_get_optional_exclusive() function may return an
ERR_PTR in case of genuine reset control acquisition errors, not just
NULL which indicates the legitimate absence of an optional reset.
Add an IS_ERR() check after the call in sun5i_timer_probe(). On error,
return the error code to ensure proper failure handling rather than
proceeding with invalid pointers.
Fixes: 7e5bac610d2f ("clocksource/drivers/sun5i: Convert to platform device driver")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Acked-by: Chen-Yu Tsai <wens@kernel.org>
Link: https://patch.msgid.link/20260205084037.3661261-1-nichen@iscas.ac.cn
---
drivers/clocksource/timer-sun5i.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
index f827d3f..d7e0129 100644
--- a/drivers/clocksource/timer-sun5i.c
+++ b/drivers/clocksource/timer-sun5i.c
@@ -286,6 +286,9 @@ static int sun5i_timer_probe(struct platform_device *pdev)
}
rstc = devm_reset_control_get_optional_exclusive(dev, NULL);
+ if (IS_ERR(rstc))
+ return dev_err_probe(dev, PTR_ERR(rstc),
+ "failed to get reset\n");
if (rstc)
reset_control_deassert(rstc);
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2026-04-12 20:39 UTC | newest]
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2026-02-05 8:40 [PATCH] clocksource/drivers/sun5i: Handle error returns from devm_reset_control_get_optional_exclusive() Chen Ni
2026-02-24 14:51 ` Chen-Yu Tsai
2026-03-04 19:35 ` Daniel Lezcano
2026-04-12 20:39 ` [tip: timers/clocksource] " tip-bot2 for Chen Ni
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