diff mbox

mmc: core: Fix Ignore obselete ext csd in eMMC4.5

Message ID 1314857991-6848-1-git-send-email-girish.shivananjappa@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Girish K S Sept. 1, 2011, 6:19 a.m. UTC 
In the eMMC 4.5 specification the EC_ERASE_MULT and
SEC_TRIM_MULT have become obselete and donot carry
any valid information.
	This patch makes sure that the above mentioned
parameters are used only for versions below eMMC 4.5.
All the versions above 4.5 will ignore their usage by
assuming them as dont cares.

Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
---
 drivers/mmc/core/core.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 91a0a74..47ce1e4 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1351,8 +1351,12 @@  static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
 			erase_timeout = 1;
 	}
 
-	/* Multiplier for secure operations */
-	if (arg & MMC_SECURE_ARGS) {
+	/* Multiplier for secure operations
+	 * eMMC 4.5 specification defines these values
+	 * sec_erase_mult,sec_trim_mult as obselete(so dont care).
+	 * These multipliers are only valid for versions < eMMC 4.5
+	 */
+	if ((arg & MMC_SECURE_ARGS) && (card->ext_csd.rev < 6)) {
 		if (arg == MMC_SECURE_ERASE_ARG)
 			erase_timeout *= card->ext_csd.sec_erase_mult;
 		else