Create MMC general purpose partitions only if
EXT_CSD_PARTITION_SETTING_COMPLETED bit is set.
Some tools may set general purpose partition size(s) but fail or stop
without finalize.
Another case is to set invalid partition size(s).
Signed-off-by: Grégory Soutadé <gsoutade@xxxxxxxxxxx>
---
drivers/mmc/core/mmc.c | 15 +++++++++++----
include/linux/mmc/mmc.h | 2 ++
2 files changed, 13 insertions(+), 4 deletions(-)
>From commit b6603fe574af289dbe9eb9fb4c540bca04f5a053 in master linux tree.
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 793c6f7..b9fe211 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -471,10 +471,17 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
part_size *= (size_t)(hc_erase_grp_sz *
hc_wp_grp_sz);
- mmc_part_add(card, part_size << 19,
- EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
- "gp%d", idx, false,
- MMC_BLK_DATA_AREA_GP);
+ if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
+ EXT_CSD_PART_SETTING_COMPLETED) {
+ mmc_part_add(card, part_size << 19,
+ EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
+ "gp%d", idx, false,
+ MMC_BLK_DATA_AREA_GP);
+ } else {
+ pr_warn("%s: has partition size defined, but setting is not complete\n",
+ mmc_hostname(card->host));
+ break;
+ }
}
}
card->ext_csd.sec_trim_mult =
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 64ec963..78753bc 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -281,6 +281,7 @@ struct _mmc_csd {
#define EXT_CSD_EXP_EVENTS_CTRL 56 /* R/W, 2 bytes */
#define EXT_CSD_DATA_SECTOR_SIZE 61 /* R */
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
+#define EXT_CSD_PARTITION_SETTING_COMPLETED 155 /* R/W */
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
#define EXT_CSD_HPI_MGMT 161 /* R/W */
@@ -349,6 +350,7 @@ struct _mmc_csd {
#define EXT_CSD_PART_CONFIG_ACC_RPMB (0x3)
#define EXT_CSD_PART_CONFIG_ACC_GP0 (0x4)
+#define EXT_CSD_PART_SETTING_COMPLETED (0x1)
#define EXT_CSD_PART_SUPPORT_PART_EN (0x1)
#define EXT_CSD_CMD_SET_NORMAL (1<<0)
--
1.7.0.4
--
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