diff mbox series

[v5,4/4] mmc: block: abort requests and suppress errors after undervoltage shutdown

Message ID 20250506095118.2239459-5-o.rempel@pengutronix.de
State New
Headers show
Series mmc: handle undervoltage events and prevent eMMC corruption | expand

Commit Message

Oleksij Rempel May 6, 2025, 9:51 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 585c2b274d98..2f07610d3c35 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 284856c8f655..1dd71ea6927d 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;
 	}