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mmc: rtsx_usb_sdmmc: Don't runtime resume the device while changing led 

In case the card has been powered off, it seems silly to continue to allow
the led to be updated. Instead let's forbid that, as it enables us to
prevent runtime resuming the device and thus avoids wasting energy.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
This commit is contained in:
Ulf Hansson 2018-05-31 11:40:39 +02:00
parent 7d5ef51257
commit 4bfdd76dcb
1 changed files with 5 additions and 1 deletions
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6
drivers/mmc/host/rtsx_usb_sdmmc.c
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@ -1297,14 +1297,18 @@ 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));
pm_runtime_get_noresume(sdmmc_dev(host));
mutex_lock(&ucr->dev_mutex);
if (host->power_mode == MMC_POWER_OFF)
goto out;
if (host->led.brightness == LED_OFF)
rtsx_usb_turn_off_led(ucr);
else
rtsx_usb_turn_on_led(ucr);
out:
mutex_unlock(&ucr->dev_mutex);
pm_runtime_put(sdmmc_dev(host));
}