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