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67d998e25d
Changelog: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.145
No patches needed a rebase.
23.05 backport:
Rebased patch mediatek/100-dts-update-mt7622-rfb1.patch due to
changes introduced in commit e37aa926447f ("arm64: dts: mediatek:
mt7622: fix memory node warning check") in version v5.15.143 and we
jumped over from v5.15.139 directly to v5.15.145.
Build system: x86_64
Build-tested: ramips/tplink_archer-a6-v3
Run-tested: ramips/tplink_archer-a6-v3
23.05 backport:
Stijn:
Compile-tested: ath79/generic, ipq40xx/generic, mvebu/cortexa72, ramips/mt{7621,7620,76x8}, realtek/rtl{838x,930x}, 86/64.
Run-tested: cortexa72 (RB5009UG+S+IN), mt7621 (EAP615-Wall v1), rtl838x (GS1900-10HP, GS1900-8HP, GS108T v3).
Petr:
Compile-tested: ipq807x, mvebu/cortexa9
Run-tested: turris-omnia, prpl-haze
Tested-by: Stijn Segers <foss@volatilesystems.org> [23.05 testing]
Signed-off-by: John Audia <therealgraysky@proton.me>
Signed-off-by: Petr Štetiar <ynezz@true.cz> [23.05 refresh]
(cherry picked from commit 8de4cc77a6)
39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
From b70da899940777d92338d8f83f7a6236818ad08a Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.com>
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Date: Mon, 16 May 2022 10:28:27 +0100
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Subject: [PATCH] mmc: block: Don't do single-sector reads during
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recovery
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See https://github.com/raspberrypi/linux/issues/5019
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If an SD card has degraded performance such that IO operations time out
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then the MMC block layer will leak SG DMA mappings in the swiotlb during
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recovery. It retries the same SG and this causes the leak, as it is
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mapped twice - once in sdhci_pre_req() and again during single-block
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reads in sdhci_prepare_data().
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Resetting the card (including power-cycling if a regulator for vmmc is
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present) ought to be enough to recover a stuck state, so for now don't
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try single-block reads in the recovery path.
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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 | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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--- a/drivers/mmc/core/block.c
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+++ b/drivers/mmc/core/block.c
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@@ -1888,7 +1888,11 @@ static void mmc_blk_mq_rw_recovery(struc
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return;
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}
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- if (rq_data_dir(req) == READ && brq->data.blocks >
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+ /*
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+ * XXX: don't do single-sector reads, as it leaks a SG DMA
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+ * mapping when reusing the still-pending req.
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+ */
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+ if (0 && rq_data_dir(req) == READ && brq->data.blocks >
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queue_physical_block_size(mq->queue) >> 9) {
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/* Read one (native) sector at a time */
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mmc_blk_read_single(mq, req);
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