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mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led

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Accesses of the rtsx sdmmc's parent device, which is the rtsx usb device,
must be done when it's runtime resumed. Currently this isn't case when
changing the led, so let's fix this by adding a pm_runtime_get_sync() and
a pm_runtime_put() around those operations.

Reported-by: Ritesh Raj Sarraf <rrs@researchut.com>
Tested-by: Ritesh Raj Sarraf <rrs@researchut.com>
Cc: <stable@vger.kernel.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ulf Hansson 2016-09-15 14:46:21 +02:00
parent 31cf742f51
commit 4f48aa7a11
1 changed files with 2 additions and 0 deletions
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2
drivers/mmc/host/rtsx_usb_sdmmc.c
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@ -1309,6 +1309,7 @@ static void rtsx_usb_update_led(struct work_struct *work)
container_of(work, struct rtsx_usb_sdmmc, led_work);
struct rtsx_ucr *ucr = host->ucr;
pm_runtime_get_sync(sdmmc_dev(host));
mutex_lock(&ucr->dev_mutex);
if (host->led.brightness == LED_OFF)
@ -1317,6 +1318,7 @@ static void rtsx_usb_update_led(struct work_struct *work)
rtsx_usb_turn_on_led(ucr);
mutex_unlock(&ucr->dev_mutex);
pm_runtime_put(sdmmc_dev(host));
}
#endif