From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Mon, 26 Dec 2011 09:03:05 +0000 (+0900)
Subject: mmc: core: Add claiming of hosts during mmc_cache_ctrl
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=17e9ff559a7dbb7a6df332007d2ffcd3e7d83fba;p=linux-beck.git

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 a2aa860956ef..22050525be84 100644
--- 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;