From: Bradley Bolen bradleybolen@gmail.com
[ Upstream commit f3d7c2292d104519195fdb11192daec13229c219 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/mmc/core/mmc.c | 9 ++++----- 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 5ca53e225382..4b18034537f5 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -300,7 +300,7 @@ 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) { @@ -316,7 +316,7 @@ 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 -- @@ -346,8 +346,7 @@ 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, @@ -365,7 +364,7 @@ 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 8ef330027b13..3f8e84a80b4a 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -227,7 +227,7 @@ 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 */