mmc: core: Bus width testing needs to handle suspend/resume

On reading the ext_csd for the first time (in 1 bit mode), save the
ext_csd information needed for bus width compare.

On every pass we make re-reading the ext_csd, compare the data
against the saved ext_csd data.

This fixes a regression introduced in 3.0-rc1 by 08ee80cc397ac1a3
("mmc: core: eMMC bus width may not work on all platforms"), which
incorrectly assumed we would be re-reading the ext_csd at resume-
time.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index c6927a4d157f..6ad43554ac05 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -64,6 +64,19 @@ struct mmc_ext_csd {
         unsigned long long      enhanced_area_offset;   /* Units: Byte */
         unsigned int            enhanced_area_size;     /* Units: KB */
         unsigned int            boot_size;              /* in bytes */
+        u8                      raw_partition_support;  /* 160 */
+        u8                      raw_erased_mem_count;   /* 181 */
+        u8                      raw_ext_csd_structure;  /* 194 */
+        u8                      raw_card_type;          /* 196 */
+        u8                      raw_s_a_timeout;                /* 217 */
+        u8                      raw_hc_erase_gap_size;  /* 221 */
+        u8                      raw_erase_timeout_mult; /* 223 */
+        u8                      raw_hc_erase_grp_size;  /* 224 */
+        u8                      raw_sec_trim_mult;      /* 229 */
+        u8                      raw_sec_erase_mult;     /* 230 */
+        u8                      raw_sec_feature_support;/* 231 */
+        u8                      raw_trim_mult;          /* 232 */
+        u8                      raw_sectors[4];         /* 212 - 4 bytes */
 };
 
 struct sd_scr {