The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 869d37475788b0044bec1a33335e24abaf5e8884 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024120621-unplanted-data-7c88@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 869d37475788b0044bec1a33335e24abaf5e8884 Mon Sep 17 00:00:00 2001 From: Avri Altman avri.altman@wdc.com Date: Mon, 21 Oct 2024 18:32:27 +0300 Subject: [PATCH] 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...
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
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;