spi: loopback-test: fix potential integer overflow on multiple

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A multiplication of 8U * xfer-len with the type of a 32 bit unsigned int
is evaluated using 32 bit arithmetic and then used in a context that
expects an expression of type unsigned long long (64 bits).  Avoid any
potential overflow by casting BITS_PER_BYTE to unsigned long long.

Detected by CoverityScan, CID#1419691 ("Unintentional integer overflow")

Fixes: ea9936f324 ("spi: loopback-test: add elapsed time check")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Colin Ian King 2017-03-20 13:58:05 +00:00 • committed by Mark Brown

parent 8687113e15

commit d2c14c64d6

1 changed files with 2 additions and 1 deletions

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drivers/spi/spi-loopback-test.c

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