42 lines
1.2 KiB
Diff
42 lines
1.2 KiB
Diff
From 30914ed56a766f15162c3bf106797a45857d98f1 Mon Sep 17 00:00:00 2001
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From: SolidHal <hal@halemmerich.com>
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Date: Sun, 21 Oct 2018 16:40:15 -0500
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Subject: [PATCH] Added a second reset when having an issue reading the emmc.
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The c201 emmc can be... touchy. Sometimes one full reset isn't
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enough to get it into a wokring state if it found it's way into
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a really bad state. Note that in my testing WITHOUT this patch,
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this only happens about once in just over 1600 reboots.
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Signed-off-by: SolidHal <hal@halemmerich.com>
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---
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drivers/mmc/core/block.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
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index 5bc585e8..39e16e48 100644
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--- a/drivers/mmc/core/block.c
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+++ b/drivers/mmc/core/block.c
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@@ -1033,6 +1033,7 @@ static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
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return -EEXIST;
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}
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md->reset_done |= type;
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+retry:
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err = mmc_hw_reset(host);
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/* Ensure we switch back to the correct partition */
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if (err != -EOPNOTSUPP) {
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@@ -1050,6 +1051,10 @@ static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
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return -ENODEV;
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}
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}
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+ if (err){
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+ /* Try one last time, just in case. The emmc can be touchy */
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+ goto retry;
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+ }
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return err;
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}
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--
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2.11.0
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