mmc: cast u8 to unsigned long long to avoid unexpected error

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card->ext_csd.enhanced_area_offset is defined as "unsigned long long",
and, ext_csd[] is defined as u8.
unsigned long long data might have strange data if first bit of ext_csd[]
was 1. this patch cast it to (unsigned long long)
Special thanks to coverity <http://www.coverity.com>

ex)
        u8  data8;
        u64 data64;

        data8 = 0x80;
        data64 = (data8 << 24); // 0xffffffff80000000
        data64 = (((unsigned long long)data8) << 24); // 0x80000000;

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

...

This commit is contained in:

Kuninori Morimoto 2015-05-11 07:34:53 +00:00 • committed by Ulf Hansson

parent bf3a35ac80

commit ded8a5f961

1 changed files with 4 additions and 2 deletions

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6

drivers/mmc/core/mmc.c

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