linux-kernel - [PATCH stable 4.9 1/3] mmc: core: Specify timeouts for BKOPS and CACHE

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Message-Id: <20220517183207.258065-2-f.fainelli@gmail.com>
Date:   Tue, 17 May 2022 11:32:05 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     stable@...r.kernel.org
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Avri Altman <avri.altman@....com>,
        Bean Huo <beanhuo@...ron.com>,
        Nishad Kamdar <nishadkamdar@...il.com>,
        Christian Löhle <CLoehle@...erstone.com>,
        linux-mmc@...r.kernel.org (open list:MULTIMEDIA CARD (MMC), SECURE
        DIGITAL (SD) AND...), linux-kernel@...r.kernel.org (open list),
        alcooperx@...il.com
Subject: [PATCH stable 4.9 1/3] mmc: core: Specify timeouts for BKOPS and CACHE_FLUSH for eMMC

From: Ulf Hansson <ulf.hansson@...aro.org>

commit 24ed3bd01d6a844fd5e8a75f48d0a3d10ed71bf9 upstream

The timeout values used while waiting for a CMD6 for BKOPS or a CACHE_FLUSH
to complete, are not defined by the eMMC spec. However, a timeout of 10
minutes as is currently being used, is just silly for both of these cases.
Instead, let's specify more reasonable timeouts, 120s for BKOPS and 30s for
CACHE_FLUSH.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Link: https://lore.kernel.org/r/20200122142747.5690-2-ulf.hansson@linaro.org
Signed-off-by: Kamal Dasu <kdasu.kdev@...il.com>
[kamal: Drop mmc_run_bkops hunk, non-existent]
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/mmc/core/core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index f0fa6a799f7c..dfe55e9d729f 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -61,6 +61,8 @@
 /* The max erase timeout, used when host->max_busy_timeout isn't specified */
 #define MMC_ERASE_TIMEOUT_MS	(60 * 1000) /* 60 s */
 
+#define MMC_CACHE_FLUSH_TIMEOUT_MS     (30 * 1000) /* 30s */
+
 static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
 
 /*
@@ -2936,7 +2938,8 @@ int mmc_flush_cache(struct mmc_card *card)
 			(card->ext_csd.cache_size > 0) &&
 			(card->ext_csd.cache_ctrl & 1)) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-				EXT_CSD_FLUSH_CACHE, 1, 0);
+				EXT_CSD_FLUSH_CACHE, 1,
+				 MMC_CACHE_FLUSH_TIMEOUT_MS);
 		if (err)
 			pr_err("%s: cache flush error %d\n",
 					mmc_hostname(card->host), err);
-- 
2.25.1