4.4-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 987aa5f8059613bf85cbb6f64ffbd34f5cb7a9d1 ]
with CONFIG_HZ=100, the precision of jiffies is 10ms, and the generic_cmd6_time of some card is also 10ms. then, may be current time is only 5ms, but already timed out caused by jiffies precision.
Signed-off-by: Chaotian Jing chaotian.jing@mediatek.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 1f444269ebbe..76b49b9772d0 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -542,7 +542,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, timeout_ms = MMC_OPS_TIMEOUT_MS;
/* Must check status to be sure of no errors. */ - timeout = jiffies + msecs_to_jiffies(timeout_ms); + timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1; do { if (send_status) { err = __mmc_send_status(card, &status, ignore_crc);