diff mbox series

[v3,5/6] mmc: block: abort requests and suppress errors after undervoltage shutdown

Message ID 20250221093918.3942378-6-o.rempel@pengutronix.de (mailing list archive)
State New
Headers show
Series mmc: handle undervoltage events and prevent eMMC corruption | expand

Commit Message

Oleksij Rempel Feb. 21, 2025, 9:39 a.m. UTC 
Extend the existing card removal checks in mmc_blk_mq_complete_rq() and
mmc_mq_queue_rq() to also account for the undervoltage state. If the host
has entered undervoltage shutdown, mark requests as quiet and abort them
early to prevent unnecessary retries and error logging. This ensures no
further operations are attempted on the card after an emergency stop.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/mmc/core/block.c | 2 +-
 drivers/mmc/core/queue.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 4830628510e6..ecb87da0e257 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2129,7 +2129,7 @@  static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req)
 	} else if (mqrq->retries++ < MMC_MAX_RETRIES) {
 		blk_mq_requeue_request(req, true);
 	} else {
-		if (mmc_card_removed(mq->card))
+		if (mmc_card_removed(mq->card) || mq->card->host->undervoltage)
 			req->rq_flags |= RQF_QUIET;
 		blk_mq_end_request(req, BLK_STS_IOERR);
 	}
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index ab662f502fe7..f46e01988fe8 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -239,7 +239,7 @@  static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
 	bool get_card, cqe_retune_ok;
 	blk_status_t ret;
 
-	if (mmc_card_removed(mq->card)) {
+	if (mmc_card_removed(mq->card) || mq->card->host->undervoltage) {
 		req->rq_flags |= RQF_QUIET;
 		return BLK_STS_IOERR;
 	}