On Thu, 7 Nov 2019 at 04:26, Bradley Bolen <bradleybolen@xxxxxxxxx> wrote:
>
> 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@xxxxxxxxx>
> ---
> drivers/mmc/core/mmc.c | 6 +++---
> include/linux/mmc/card.h | 2 +-
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index c880489..fc02124 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;
There is also a cast to a "size_t" while computing the part_size in
mmc_manage_gp_partitions(). Should we remove that as well?
[...]
Kind regards
Uffe
