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mmc: rpmb: fixes pause retune on all RPMB partitions. 

commit e7794c14fd upstream.

When RPMB was converted to a character device, it added support for
multiple RPMB partitions (Commit 97548575be ("mmc: block: Convert RPMB to
a character device").

One of the changes in this commit was transforming the variable target_part
defined in __mmc_blk_ioctl_cmd into a bitmask. This inadvertently regressed
the validation check done in mmc_blk_part_switch_pre() and
mmc_blk_part_switch_post(), so let's fix it.

Fixes: 97548575be ("mmc: block: Convert RPMB to a character device")
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20231201153143.1449753-1-jorge@foundries.io
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jorge Ramirez-Ortiz 2023-12-01 16:31:43 +01:00 committed by Greg Kroah-Hartman
parent ba6779d68c
commit b8221ff394
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/mmc/core/block.c
View File

@ -834,9 +834,10 @@ static const struct block_device_operations mmc_bdops = {
static int mmc_blk_part_switch_pre(struct mmc_card *card,
unsigned int part_type)
{
const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_RPMB;
int ret = 0;
if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
if ((part_type & mask) == mask) {
if (card->ext_csd.cmdq_en) {
ret = mmc_cmdq_disable(card);
if (ret)
@ -851,9 +852,10 @@ static int mmc_blk_part_switch_pre(struct mmc_card *card,
static int mmc_blk_part_switch_post(struct mmc_card *card,
unsigned int part_type)
{
const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_RPMB;
int ret = 0;
if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
if ((part_type & mask) == mask) {
mmc_retune_unpause(card->host);
if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
ret = mmc_cmdq_enable(card);
@ -2929,4 +2931,3 @@ module_exit(mmc_blk_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");