diff options
| author | Bradley Bolen <bradleybolen@gmail.com> | 2019-11-17 02:00:45 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-11-18 10:05:38 +0100 |
| commit | f3d7c2292d104519195fdb11192daec13229c219 (patch) | |
| tree | 040b4395c1952d60bbb8393d1c77a1e16d752f74 | |
| parent | mmc: tmio: Add MMC_CAP_ERASE to allow erase/discard/trim requests (diff) | |
| download | linux-f3d7c2292d104519195fdb11192daec13229c219.tar.xz linux-f3d7c2292d104519195fdb11192daec13229c219.zip | |
mmc: core: Fix size overflow for mmc partitions
With large eMMC cards, it is possible to create general purpose
partitions that are bigger than 4GB. The size member of the mmc_part
struct is only an unsigned int which overflows for gp partitions larger
than 4GB. Change this to a u64 to handle the overflow.
Signed-off-by: Bradley Bolen <bradleybolen@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/core/mmc.c | 9 | ||||
| -rw-r--r-- | include/linux/mmc/card.h | 2 |
2 files changed, 5 insertions, 6 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index c8804895595f..f6912ded652d 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -297,7 +297,7 @@ static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) } } -static void mmc_part_add(struct mmc_card *card, unsigned int size, +static void mmc_part_add(struct mmc_card *card, u64 size, unsigned int part_cfg, char *name, int idx, bool ro, int area_type) { @@ -313,7 +313,7 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) { int idx; u8 hc_erase_grp_sz, hc_wp_grp_sz; - unsigned int part_size; + u64 part_size; /* * General purpose partition feature support -- @@ -343,8 +343,7 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] << 8) + ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; - part_size *= (size_t)(hc_erase_grp_sz * - hc_wp_grp_sz); + part_size *= (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, @@ -362,7 +361,7 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) { int err = 0, idx; - unsigned int part_size; + u64 part_size; struct device_node *np; bool broken_hpi = false; diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index e459b38ef33c..cf3780a6ccc4 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -226,7 +226,7 @@ struct mmc_queue_req; * MMC Physical partitions */ struct mmc_part { - unsigned int size; /* partition size (in bytes) */ + u64 size; /* partition size (in bytes) */ unsigned int part_cfg; /* partition type */ char name[MAX_MMC_PART_NAME_LEN]; bool force_ro; /* to make boot parts RO by default */ |