From: Ulf Hansson Date: Thu, 5 Nov 2015 15:08:08 +0000 (+0100) Subject: mmc: core: Keep host claimed in mmc_rescan() while calling host ops X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d234d2123fa734c8018f7d01ed5d663cf5e6f665;p=linux-beck.git mmc: core: Keep host claimed in mmc_rescan() while calling host ops As mmc_claim_host() invokes pm_runtime_get_sync() for the mmc host device, it's important that the host is kept claimed for *all* accesses to it via the host_ops callbacks. In mmc_rescan(), the ->card_event() and the ->get_cd() callback are being invoked without claiming the host, let's fix this. Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index c1027a432785..394963d3fb18 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2576,7 +2576,9 @@ void mmc_rescan(struct work_struct *work) host->rescan_entered = 1; if (host->trigger_card_event && host->ops->card_event) { + mmc_claim_host(host); host->ops->card_event(host); + mmc_release_host(host); host->trigger_card_event = false; } @@ -2611,15 +2613,14 @@ void mmc_rescan(struct work_struct *work) */ mmc_bus_put(host); + mmc_claim_host(host); if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && host->ops->get_cd(host) == 0) { - mmc_claim_host(host); mmc_power_off(host); mmc_release_host(host); goto out; } - mmc_claim_host(host); for (i = 0; i < ARRAY_SIZE(freqs); i++) { if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) break;