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

[Guangshuo Li <lgs201920130244@gmail.com>]

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