From: Łukasz Majewski <l.majewski@samsung.com>
Date: Thu, 19 Apr 2012 02:39:18 +0000 (+0000)
Subject: mmc:fix Call mmc_init() when executing mmc_get_dev()
X-Git-Tag: v2012.07-rc2~10^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=40242bc394030871e6de13883fe1ace5c0b8e15b;p=platform%2Fkernel%2Fu-boot.git

mmc:fix Call mmc_init() when executing mmc_get_dev()

This code adds call to mmc_init(), for partition related commands (e.g.
fatls, fatinfo etc.).

It is safe to call mmc_init() multiple times since mmc->has_init flag
prevents from multiple initialization.

The FAT related code calls get_dev high level method and then uses
elements from mmc->block_dev, which is uninitialized until the mmc_init
(and thereof mmc_startup) is called.

This problem appears on boards, which don't use mmc as the default
place for envs

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Andy Fleming <afleming@gmail.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
---

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 9f746a3..98e5af3 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1306,8 +1306,11 @@ int mmc_register(struct mmc *mmc)
 block_dev_desc_t *mmc_get_dev(int dev)
 {
 	struct mmc *mmc = find_mmc_device(dev);
+	if (!mmc)
+		return NULL;
 
-	return mmc ? &mmc->block_dev : NULL;
+	mmc_init(mmc);
+	return &mmc->block_dev;
 }
 #endif