[U-Boot] [PATCH] mmc: fix capacity calculation when EXT_CSD_SEC_CNT is used

[Shimoda, Yoshihiro]

Since the type of "ext_csd" was array of char, the following
calculation might fail when the value of ext_csd[EXT_CSD_SEC_CNT]
was minus.

	capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
			| ext_csd[EXT_CSD_SEC_CNT + 1] << 8
			| ext_csd[EXT_CSD_SEC_CNT + 2] << 16
			| ext_csd[EXT_CSD_SEC_CNT + 3] << 24;

So, this patch changes the type of "ext_csd" to array of u8.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh at renesas.com>
---
 drivers/mmc/mmc.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 596732e..b781201 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -668,7 +668,7 @@ int mmc_send_op_cond(struct mmc *mmc)
 }


-int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
+int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
 {
 	struct mmc_cmd cmd;
 	struct mmc_data data;
@@ -680,7 +680,7 @@ int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
 	cmd.cmdarg = 0;
 	cmd.flags = 0;

-	data.dest = ext_csd;
+	data.dest = (char *)ext_csd;
 	data.blocks = 1;
 	data.blocksize = 512;
 	data.flags = MMC_DATA_READ;
@@ -716,7 +716,7 @@ int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)

 int mmc_change_freq(struct mmc *mmc)
 {
-	ALLOC_CACHE_ALIGN_BUFFER(char, ext_csd, 512);
+	ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
 	char cardtype;
 	int err;

@@ -978,8 +978,8 @@ int mmc_startup(struct mmc *mmc)
 	uint mult, freq;
 	u64 cmult, csize, capacity;
 	struct mmc_cmd cmd;
-	ALLOC_CACHE_ALIGN_BUFFER(char, ext_csd, 512);
-	ALLOC_CACHE_ALIGN_BUFFER(char, test_csd, 512);
+	ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
+	ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, 512);
 	int timeout = 1000;

 #ifdef CONFIG_MMC_SPI_CRC_ON
-- 
1.7.1