It turned out that polling period for MMC_SEND_OP_COND, that currently is
set to 1ms, still isn't sufficient. In particular a Micron eMMC on a
Beaglebone platform, is reported to sometimes fail to initialize.
Additional test, shows that extending the period to 4ms is working fine, so
let's make that change.
Reported-by: Jean Rene Dawin <jdawin@xxxxxxxxxxxxxxxxxxxxx>
Tested-by: Jean Rene Dawin <jdawin@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 1760fdb6fe9f (mmc: core: Restore (almost) the busy polling for MMC_SEND_OP_COND")
Fixes: 76bfc7ccc2fa ("mmc: core: adjust polling interval for CMD1")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
drivers/mmc/core/mmc_ops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 180d7e9d3400..81c55bfd6e0c 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -21,7 +21,7 @@
#define MMC_BKOPS_TIMEOUT_MS (120 * 1000) /* 120s */
#define MMC_SANITIZE_TIMEOUT_MS (240 * 1000) /* 240s */
-#define MMC_OP_COND_PERIOD_US (1 * 1000) /* 1ms */
+#define MMC_OP_COND_PERIOD_US (4 * 1000) /* 4ms */
#define MMC_OP_COND_TIMEOUT_MS 1000 /* 1s */
static const u8 tuning_blk_pattern_4bit[] = {
--
2.25.1
