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mmc: mmci: stm32: fix max busy timeout calculation

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commit 47b3ad6b7842f49d374a01b054a4b1461a621bdc upstream.

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: 8266c585f4 ("mmc: mmci: add hardware busy timeout feature")
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Signed-off-by: Christophe 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: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christophe Kerello 2023-06-13 15:41:46 +02:00 committed by Greg Kroah-Hartman
parent 6c2af0fd83
commit f1b17198e4
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/host/mmci.c
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@ -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;
}