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| author |   Avri Altman <avri.altman@wdc.com> | 2024-10-21 18:32:27 +0300 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2024-10-25 16:37:26 +0200 |
| commit | 869d37475788b0044bec1a33335e24abaf5e8884 (patch) | |
| tree | 9fbd9945e2112b3e9481b033d71f5efdfa4da6ea | |
| parent | dt-bindings: mmc: sdhci-msm: Add SAR2130P compatible (diff) | |
| download | wireguard-linux-869d37475788b0044bec1a33335e24abaf5e8884.tar.xz wireguard-linux-869d37475788b0044bec1a33335e24abaf5e8884.zip | |
mmc: core: Use GFP_NOIO in ACMD22
While reviewing the SDUC series, Adrian made a comment concerning the
memory allocation code in mmc_sd_num_wr_blocks() - see [1].
Prevent memory allocations from triggering I/O operations while ACMD22
is in progress.
[1] https://lore.kernel.org/linux-mmc/3016fd71-885b-4ef9-97ed-46b4b0cb0e35@intel.com/
Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 051913dada04 ("mmc_block: do not DMA to stack")
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Cc: stable@vger.kernel.org
Message-ID: <20241021153227.493970-1-avri.altman@wdc.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/core/block.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 04f3165cf9ae..a813fd7f39cc 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -995,6 +995,8 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) u32 result; __be32 *blocks; u8 resp_sz = mmc_card_ult_capacity(card) ? 8 : 4; + unsigned int noio_flag; + struct mmc_request mrq = {}; struct mmc_command cmd = {}; struct mmc_data data = {}; @@ -1018,7 +1020,9 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) mrq.cmd = &cmd; mrq.data = &data; + noio_flag = memalloc_noio_save(); blocks = kmalloc(resp_sz, GFP_KERNEL); + memalloc_noio_restore(noio_flag); if (!blocks) return -ENOMEM; |