From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> 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@xxxxxxxxxxx> --- v1 -> v2 - Tidyjp log comment drivers/mmc/core/mmc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index f36c76f..2be4073 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -266,8 +266,10 @@ static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) * calculate the enhanced data area offset, in bytes */ card->ext_csd.enhanced_area_offset = - (ext_csd[139] << 24) + (ext_csd[138] << 16) + - (ext_csd[137] << 8) + ext_csd[136]; + (((unsigned long long)ext_csd[139]) << 24) + + (((unsigned long long)ext_csd[138]) << 16) + + (((unsigned long long)ext_csd[137]) << 8) + + (((unsigned long long)ext_csd[136])); if (mmc_card_blockaddr(card)) card->ext_csd.enhanced_area_offset <<= 9; /* -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
