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mmc: core: Keep host claimed while invoking mmc_power_off|up()

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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 some code paths for SDIO, particularly related to the PM support,
mmc_power_off|up() is invoked without keeping the host claimed. Let's fix
these.

Moreover, mmc_start|stop_host() also invokes mmc_power_off|up() without
claiming the host, let's fix these as well.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Ulf Hansson
2015-09-11 14:41:55 +02:00
parent 0cd2f04453
commit 8d1ffc8c98
2 changed files with 21 additions and 5 deletions
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6
drivers/mmc/core/core.c
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@@ -2633,10 +2633,14 @@ void mmc_start_host(struct mmc_host *host)
host->f_init = max(freqs[0], host->f_min);
host->rescan_disable = 0;
host->ios.power_mode = MMC_POWER_UNDEFINED;
mmc_claim_host(host);
if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)
mmc_power_off(host);
else
mmc_power_up(host, host->ocr_avail);
mmc_release_host(host);
mmc_gpiod_request_cd_irq(host);
_mmc_detect_change(host, 0, false);
}
@@ -2674,7 +2678,9 @@ void mmc_stop_host(struct mmc_host *host)
BUG_ON(host->card);
mmc_claim_host(host);
mmc_power_off(host);
mmc_release_host(host);
}
int mmc_power_save_host(struct mmc_host *host)