Commit 4288c31a authored by Haibo Chen's avatar Haibo Chen Committed by Ben Hutchings

mmc: sdhci: cast unsigned int to unsigned long long to avoid unexpeted error

commit 02265cd6 upstream.

Potentially overflowing expression 1000000 * data->timeout_clks with
type unsigned int is evaluated using 32-bit arithmetic, and then used
in a context that expects an expression of type unsigned long long.

To avoid overflow, cast 1000000U to type unsigned long long.
Special thanks to Coverity.

Fixes: 7f05538a ("mmc: sdhci: fix data timeout (part 2)")
Signed-off-by: default avatarHaibo Chen <haibo.chen@nxp.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 512f4d83
......@@ -669,7 +669,7 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
* host->clock is in Hz. target_timeout is in us.
* Hence, us = 1000000 * cycles / Hz. Round up.
*/
val = 1000000 * data->timeout_clks;
val = 1000000ULL * data->timeout_clks;
if (do_div(val, host->clock))
target_timeout++;
target_timeout += val;
......
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