[PATCH] crypto: ccree: fix autosuspend cleanup during teardown

[PATCH] crypto: ccree: fix autosuspend cleanup during teardown

[Guangshuo Li]

init_cc_resources() calls pm_runtime_use_autosuspend(), but neither
the probe failure path nor cleanup_cc_resources() calls the matching
pm_runtime_dont_use_autosuspend() before disabling runtime PM.

If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without calling pm_runtime_dont_use_autosuspend()
during teardown, this reference is not dropped and usage_count remains
unbalanced.

Add the missing pm_runtime_dont_use_autosuspend() calls to both the
probe failure and device cleanup paths before disabling runtime PM.

This issue was found by manual code inspection.

Fixes: 4c3f97276e15 ("crypto: ccree - introduce CryptoCell driver")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/crypto/ccree/cc_driver.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
index 061e68a31c36..b127ec64a087 100644
--- a/drivers/crypto/ccree/cc_driver.c
+++ b/drivers/crypto/ccree/cc_driver.c
@@ -567,6 +567,7 @@ static int init_cc_resources(struct platform_device *plat_dev)
 post_regs_err:
 	fini_cc_regs(new_drvdata);
 post_pm_err:
+	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_put_noidle(dev);
 	pm_runtime_disable(dev);
 	pm_runtime_set_suspended(dev);
@@ -594,6 +595,7 @@ static void cleanup_cc_resources(struct platform_device *plat_dev)
 	cc_fips_fini(drvdata);
 	cc_debugfs_fini(drvdata);
 	fini_cc_regs(drvdata);
+	pm_runtime_dont_use_autosuspend(dev);
 	pm_runtime_put_noidle(dev);
 	pm_runtime_disable(dev);
 	pm_runtime_set_suspended(dev);
-- 
2.43.0

Re: [PATCH] crypto: ccree: fix autosuspend cleanup during teardown

[Herbert Xu]

On Sat, Aug 08, 2026 at 05:17:34PM +0800, Guangshuo Li wrote:
>
> diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
> index 061e68a31c36..b127ec64a087 100644
> --- a/drivers/crypto/ccree/cc_driver.c
> +++ b/drivers/crypto/ccree/cc_driver.c
> @@ -567,6 +567,7 @@ static int init_cc_resources(struct platform_device *plat_dev)
>  post_regs_err:
>  	fini_cc_regs(new_drvdata);
>  post_pm_err:
> +	pm_runtime_dont_use_autosuspend(dev);
>  	pm_runtime_put_noidle(dev);
>  	pm_runtime_disable(dev);
>  	pm_runtime_set_suspended(dev);

Sashiko is asking about the order of these pm_runtime calls, could
you please investigate?

https://sashiko.dev/#/patchset/20260808091734.2727295-1-lgs201920130244%40gmail.com

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: [PATCH] crypto: ccree: fix autosuspend cleanup during teardown

[Krzysztof Kozlowski]

On 08/08/2026 11:17, Guangshuo Li wrote:
> init_cc_resources() calls pm_runtime_use_autosuspend(), but neither
> the probe failure path nor cleanup_cc_resources() calls the matching
> pm_runtime_dont_use_autosuspend() before disabling runtime PM.
> 
> If the autosuspend delay is set to a negative value while autosuspend
> is enabled, the runtime PM core increments usage_count to prevent
> runtime suspend. Without calling pm_runtime_dont_use_autosuspend()
> during teardown, this reference is not dropped and usage_count remains
> unbalanced.
> 
> Add the missing pm_runtime_dont_use_autosuspend() calls to both the
> probe failure and device cleanup paths before disabling runtime PM.
> 
> This issue was found by manual code inspection.
> 
> Fixes: 4c3f97276e15 ("crypto: ccree - introduce CryptoCell driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>

You sent vast amount of patches, all separate, making it very difficult
to track and respond in efficient way. Do not do that.

Group your work per subsystem.

You were asked to clarify and respond to incorrect fixes statement. I do
not see how you clarified and responded at all.

Best regards,
Krzysztof