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mmc: block: disable CQ on SD cards when doing non-Discard erase

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Only CMD38 with Arg=0x1 (Discard) is supported when in CQ mode, so
turn it off before issuing a non-discard erase op.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
This commit is contained in:
Jonathan Bell
2024-10-18 13:11:11 +01:00
committed by Dom Cobley
parent d0b31346d5
commit df0b2f93f1
1 changed files with 19 additions and 0 deletions
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19
drivers/mmc/core/block.c
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@@ -1240,12 +1240,26 @@ static void mmc_blk_issue_erase_rq(struct mmc_queue *mq, struct request *req,
sector_t from;
int err = 0;
blk_status_t status = BLK_STS_OK;
bool restart_cmdq = false;
if (!mmc_card_can_erase(card)) {
status = BLK_STS_NOTSUPP;
goto fail;
}
/*
* Only Discard ops are supported with SD cards in CQ mode
* (SD Physical Spec v9.00 4.19.2)
*/
if (mmc_card_sd(card) && card->ext_csd.cmdq_en && erase_arg != SD_DISCARD_ARG) {
restart_cmdq = true;
err = mmc_sd_cmdq_disable(card);
if (err) {
status = BLK_STS_IOERR;
goto fail;
}
}
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
@@ -1266,6 +1280,11 @@ static void mmc_blk_issue_erase_rq(struct mmc_queue *mq, struct request *req,
status = BLK_STS_IOERR;
else
mmc_blk_reset_success(md, type);
if (restart_cmdq)
err = mmc_sd_cmdq_enable(card);
if (err)
status = BLK_STS_IOERR;
fail:
blk_mq_end_request(req, status);
}