From: Ulf Hansson Date: Thu, 15 Sep 2016 12:46:21 +0000 (+0200) Subject: mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led X-Git-Tag: firefly_0821_release~176^2~4^2~22^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aef07c9db2fb6d4a7d9e0e5ee587c04c411c6369;p=firefly-linux-kernel-4.4.55.git mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led commit 4f48aa7a11bfed9502a7c85a5b68cd40ea827f73 upstream. 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 Tested-by: Ritesh Raj Sarraf Cc: Alan Stern Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c index fe9f82b19fc0..da9f71b8deb0 100644 --- a/drivers/mmc/host/rtsx_usb_sdmmc.c +++ b/drivers/mmc/host/rtsx_usb_sdmmc.c @@ -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