github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 01:32:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mmc: sdhci-esdhc-imx: fix resume error handling

Browse Source 
Check pm_runtime_force_resume() return value in resume. If it fails
(clock enable failure), return immediately since accessing hardware
registers on an unclocked device would cause a kernel panic.

The early return intentionally skips enable_irq() and
sdhci_disable_irq_wakeups() because the IRQ handler reads
SDHCI_INT_STATUS, which would also fault without clocks. The PM runtime
usage counter leak only affects this already-broken device instance and
is an acceptable tradeoff to preserve system stability.

Remove the return value check for mmc_gpio_set_cd_wake(host->mmc, false)
since disable_irq_wake() called internally always returns 0.

Also return 0 explicitly on the success path instead of propagating
stale return values.

Fixes: 676a838556 ("mmc: host: sdhci-esdhc-imx: refactor the system PM logic")
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Luke Wang <ziniu.wang_1@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Luke Wang 2026-07-15 15:18:18 +08:00 committed by Ulf Hansson
parent 6aa00a43bb
commit e27c946b58
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@ -2123,12 +2123,12 @@ static int sdhci_esdhc_resume(struct device *dev)
dev_warn(dev, "Failed to restore pinctrl state\n");
}
pm_runtime_force_resume(dev);
ret = mmc_gpio_set_cd_wake(host->mmc, false);
ret = pm_runtime_force_resume(dev);
if (ret)
return ret;
mmc_gpio_set_cd_wake(host->mmc, false);
/* re-initialize hw state in case it's lost in low power mode */
sdhci_esdhc_imx_hwinit(host);
@ -2155,7 +2155,7 @@ static int sdhci_esdhc_resume(struct device *dev)
pm_runtime_put_autosuspend(dev);
return ret;
return 0;
}
static int sdhci_esdhc_runtime_suspend(struct device *dev)