Commit e949dee3 authored by Ulf Hansson's avatar Ulf Hansson
Browse files

mmc: core: Fix busy polling for MMC_SEND_OP_COND again 



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: default avatarJean Rene Dawin <jdawin@math.uni-bielefeld.de>
Tested-by: default avatarJean Rene Dawin <jdawin@math.uni-bielefeld.de>
Fixes: 1760fdb6 (mmc: core: Restore (almost) the busy polling for MMC_SEND_OP_COND")
Fixes: 76bfc7cc ("mmc: core: adjust polling interval for CMD1")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220517101046.27512-1-ulf.hansson@linaro.org
parent 3e5a8e84

drivers/mmc/core/mmc_ops.c

+1 −1
Original line number Diff line number Diff line
@@ -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[] = {