This is a note to let you know that I've just added the patch titled
mmc: core: fix dead loop of mmc_retune
to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-core-fix-dead-loop-of-mmc_retune.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 031277d4d33d33f0174fbb569ca8f68238175617 Mon Sep 17 00:00:00 2001
From: Chaotian Jing <[email protected]>
Date: Wed, 30 Sep 2015 17:37:18 +0800
Subject: mmc: core: fix dead loop of mmc_retune
From: Chaotian Jing <[email protected]>
commit 031277d4d33d33f0174fbb569ca8f68238175617 upstream.
When get a CRC error, start the mmc_retune, it will issue CMD19/CMD21
to do tune, assume there were 10 clock phase need to try, phase 0 to
phase 6 is ok, phase 7 to phase 9 is NG, we try it from 0 to 9, so
the last CMD19/CMD21 will get CRC error, host->need_retune was set and
cause mmc_retune was called, then dead loop of mmc_retune
Signed-off-by: Chaotian Jing <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Fixes: bd11e8bd03ca ("mmc: core: Flag re-tuning is needed on CRC errors")
Signed-off-by: Ulf Hansson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/mmc/core/core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -134,9 +134,11 @@ void mmc_request_done(struct mmc_host *h
int err = cmd->error;
/* Flag re-tuning needed on CRC errors */
- if (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
+ if ((cmd->opcode != MMC_SEND_TUNING_BLOCK &&
+ cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
+ (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
(mrq->data && mrq->data->error == -EILSEQ) ||
- (mrq->stop && mrq->stop->error == -EILSEQ))
+ (mrq->stop && mrq->stop->error == -EILSEQ)))
mmc_retune_needed(host);
if (err && cmd->retries && mmc_host_is_spi(host)) {
Patches currently in stable-queue which might be from
[email protected] are
queue-4.2/mmc-core-fix-dead-loop-of-mmc_retune.patch
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