Commit 47b3ad6b authored by Christophe Kerello's avatar Christophe Kerello Committed by Ulf Hansson
Browse files

mmc: mmci: stm32: fix max busy timeout calculation 



The way that the timeout is currently calculated could lead to a u64
timeout value in mmci_start_command(). This value is then cast in a u32
register that leads to mmc erase failed issue with some SD cards.

Fixes: 8266c585 ("mmc: mmci: add hardware busy timeout feature")
Signed-off-by: default avatarYann Gautier <yann.gautier@foss.st.com>
Signed-off-by: default avatarChristophe Kerello <christophe.kerello@foss.st.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230613134146.418016-1-yann.gautier@foss.st.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e6f9e590

drivers/mmc/host/mmci.c

+2 −1
Original line number Diff line number Diff line
@@ -1735,7 +1735,8 @@ static void mmci_set_max_busy_timeout(struct mmc_host *mmc) 
		return;



	if (host->variant->busy_timeout && mmc->actual_clock)

		max_busy_timeout = ~0UL / (mmc->actual_clock / MSEC_PER_SEC);

		max_busy_timeout = U32_MAX / DIV_ROUND_UP(mmc->actual_clock,

							  MSEC_PER_SEC);



	mmc->max_busy_timeout = max_busy_timeout;

}