mmc: core: Add claiming of hosts during mmc_cache_ctrl

While calling mmc_cache_ctrl() a host is not claimed. This patch
adds the mmc_try_claim_host() for quick response in suspend.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index a2aa860..2205052 100644 (file)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2355,7 +2355,13 @@ int mmc_suspend_host(struct mmc_host *host)
                cancel_delayed_work(&host->disable);
        cancel_delayed_work(&host->detect);
        mmc_flush_scheduled_work();
-       err = mmc_cache_ctrl(host, 0);
+       if (mmc_try_claim_host(host)) {
+               err = mmc_cache_ctrl(host, 0);
+               mmc_do_release_host(host);
+       } else {
+               err = -EBUSY;
+       }
+
        if (err)
                goto out;