mirror of
https://github.com/Ysurac/openmptcprouter.git
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55 lines
1.4 KiB
Diff
55 lines
1.4 KiB
Diff
From a9fe88271eb7576b1c176e1f1086d80413c88af5 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.com>
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Date: Fri, 18 Oct 2024 13:11:11 +0100
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Subject: [PATCH 446/697] mmc: block: disable CQ on SD cards when doing
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non-Discard erase
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Only CMD38 with Arg=0x1 (Discard) is supported when in CQ mode, so
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turn it off before issuing a non-discard erase op.
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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---
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drivers/mmc/core/block.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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--- a/drivers/mmc/core/block.c
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+++ b/drivers/mmc/core/block.c
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@@ -1239,12 +1239,26 @@ static void mmc_blk_issue_erase_rq(struc
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unsigned int from, nr;
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int err = 0;
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blk_status_t status = BLK_STS_OK;
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+ bool restart_cmdq = false;
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if (!mmc_can_erase(card)) {
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status = BLK_STS_NOTSUPP;
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goto fail;
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}
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+ /*
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+ * Only Discard ops are supported with SD cards in CQ mode
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+ * (SD Physical Spec v9.00 4.19.2)
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+ */
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+ if (mmc_card_sd(card) && card->ext_csd.cmdq_en && erase_arg != SD_DISCARD_ARG) {
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+ restart_cmdq = true;
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+ err = mmc_sd_cmdq_disable(card);
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+ if (err) {
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+ status = BLK_STS_IOERR;
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+ goto fail;
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+ }
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+ }
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+
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from = blk_rq_pos(req);
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nr = blk_rq_sectors(req);
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@@ -1265,6 +1279,11 @@ static void mmc_blk_issue_erase_rq(struc
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status = BLK_STS_IOERR;
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else
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mmc_blk_reset_success(md, type);
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+
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+ if (restart_cmdq)
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+ err = mmc_sd_cmdq_enable(card);
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+ if (err)
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+ status = BLK_STS_IOERR;
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fail:
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blk_mq_end_request(req, status);
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}
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