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mtk-sd: reset host->mrq on prepare_data() error

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commit ec54c0a20709ed6e56f40a8d59eee725c31a916b upstream.

Do not leave host with dangling ->mrq pointer if we hit
the msdc_prepare_data() error out path.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Fixes: f5de469990f1 ("mtk-sd: Prevent memory corruption from DMA map failure")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250625052106.584905-1-senozhatsky@chromium.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergey Senozhatsky
2025-06-25 14:20:37 +09:00
committed by Greg Kroah-Hartman
parent 61cdd66356
commit b935c1e734
1 changed files with 1 additions and 0 deletions
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1
drivers/mmc/host/mtk-sd.c
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@@ -1347,6 +1347,7 @@ static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
if (mrq->data) {
msdc_prepare_data(host, mrq->data);
if (!msdc_data_prepared(mrq->data)) {
host->mrq = NULL;
/*
* Failed to prepare DMA area, fail fast before
* starting any commands.