Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 43/46] mmc: core: Fix bit width test failing on old eMMC cards | Date | Mon, 6 May 2013 15:58:49 -0700 |
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3.0-stable review patch. If anyone has any objections, please let me know.
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From: Philip Rakity <prakity@yahoo.com>
commit 836dc2fe89c968c10cada87e0dfae6626f8f9da3 upstream.
PARTITION_SUPPORT needs to be set before doing the compare on version number so the bit width test does not get invalid data. Before this patch, a Sandisk iNAND eMMC card would detect 1-bit width although the hardware supports 4-bit.
Only affects old emmc devices - pre 4.4 devices.
Reported-by: Elad Yi <elad.yi@gmail.com> Signed-off-by: Philip Rakity <prakity@yahoo.com> Signed-off-by: Chris Ball <cjb@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/mmc/core/mmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -353,13 +353,13 @@ static int mmc_read_ext_csd(struct mmc_c ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; card->ext_csd.raw_trim_mult = ext_csd[EXT_CSD_TRIM_MULT]; + card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; if (card->ext_csd.rev >= 4) { /* * Enhanced area feature support -- check whether the eMMC * card has the Enhanced area enabled. If so, export enhanced * area offset and size to user by adding sysfs interface. */ - card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { u8 hc_erase_grp_sz =
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