From: Ohad Ben-Cohen Date: Sat, 2 Oct 2010 11:54:12 +0000 (+0200) Subject: mmc: sdio: ensure mmc_sdio_detect is powered X-Git-Tag: firefly_0821_release~7613^2~3588^2~22 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=87973ba27b751353e2915cb3aa5c0e0dc6a79a4f;p=firefly-linux-kernel-4.4.55.git mmc: sdio: ensure mmc_sdio_detect is powered To prevent an erroneous removal of the card, make sure the device is powered when it is mmc_sdio_detect()ed. This is required since mmc_sdio_detect may be invoked while the device is runtime suspended (e.g., MMC core is rescanning when system comes out of suspend). Signed-off-by: Ohad Ben-Cohen Tested-by: Luciano Coelho Signed-off-by: Chris Ball --- diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 85561dde4c9d..c3ad1058cd31 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -546,6 +546,11 @@ static void mmc_sdio_detect(struct mmc_host *host) BUG_ON(!host); BUG_ON(!host->card); + /* Make sure card is powered before detecting it */ + err = pm_runtime_get_sync(&host->card->dev); + if (err < 0) + goto out; + mmc_claim_host(host); /* @@ -555,6 +560,7 @@ static void mmc_sdio_detect(struct mmc_host *host) mmc_release_host(host); +out: if (err) { mmc_sdio_remove(host); @@ -562,6 +568,9 @@ static void mmc_sdio_detect(struct mmc_host *host) mmc_detach_bus(host); mmc_release_host(host); } + + /* Tell PM core that we're done */ + pm_runtime_put(&host->card->dev); } /*