[1/3] mmc: core: Specify timeouts for BKOPS and CACHE_FLUSH for eMMC

Message ID 20200122142747.5690-2-ulf.hansson@linaro.org
State New
Headers show
Series
  • mmc: core: Update timeouts for __mmc_switch()
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Commit Message

Ulf Hansson Jan. 22, 2020, 2:27 p.m.
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@linaro.org>

---
 drivers/mmc/core/mmc_ops.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

-- 
2.17.1

Patch

diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 09113b9ad679..1966abcbc7c0 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -19,7 +19,9 @@ 
 #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,
@@ -941,7 +943,7 @@  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);
@@ -961,7 +963,8 @@  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);