From 486bd202ecd72ba111d06aa97ab067715a2e2d2d Mon Sep 17 00:00:00 2001 From: Jonathan Bell Date: Fri, 18 Oct 2024 13:11:11 +0100 Subject: [PATCH] mmc: block: disable CQ on SD cards when doing non-Discard erase 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 --- drivers/mmc/core/block.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1239,12 +1239,26 @@ static void mmc_blk_issue_erase_rq(struc unsigned int from, nr; int err = 0; blk_status_t status = BLK_STS_OK; + bool restart_cmdq = false; if (!mmc_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); @@ -1265,6 +1279,11 @@ static void mmc_blk_issue_erase_rq(struc 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); }