linux-kernel - [PATCH stable 4.19 v2 2/4] mmc: core: Specify timeouts for BKOPS and CACHE

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Message-Id: <20220519184536.370540-3-f.fainelli@gmail.com>
Date:   Thu, 19 May 2022 11:45:34 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     stable@...r.kernel.org
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        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, kdasu.kdev@...il.com
Subject: [PATCH stable 4.19 v2 2/4] 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: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/mmc/core/mmc_ops.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 6d759fc6165d..2b0bfead730a 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -23,7 +23,9 @@
 #include "host.h"
 #include "mmc_ops.h"
 
-#define MMC_OPS_TIMEOUT_MS	(10 * 60 * 1000) /* 10 minute timeout */
+#define MMC_OPS_TIMEOUT_MS		(10 * 60 * 1000) /* 10min*/
+#define MMC_BKOPS_TIMEOUT_MS		(120 * 1000) /* 120s */
+#define MMC_CACHE_FLUSH_TIMEOUT_MS	(30 * 1000) /* 30s */
 
 static const u8 tuning_blk_pattern_4bit[] = {
 	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
@@ -947,7 +949,7 @@ void mmc_run_bkops(struct mmc_card *card)
 	 * urgent levels by using an asynchronous background task, when idle.
 	 */
 	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-			EXT_CSD_BKOPS_START, 1, MMC_OPS_TIMEOUT_MS);
+			 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
 	if (err)
 		pr_warn("%s: Error %d starting bkops\n",
 			mmc_hostname(card->host), err);
@@ -965,7 +967,8 @@ int mmc_flush_cache(struct mmc_card *card)
 
 	if (mmc_cache_enabled(card->host)) {
 		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