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atm: zatm: fix memcmp casting

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memcmp() returns int, but eprom_try_esi() cast it to unsigned char. One
can lose significant bits and get 0 from non-0 value returned by the
memcmp().

Signed-off-by: Ivan Bornyakov <brnkv.i1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Bornyakov 2018-05-25 20:49:52 +03:00 committed by David S. Miller
parent 3125642695
commit f9c6442a8f
1 changed files with 2 additions and 2 deletions
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4
drivers/atm/zatm.c
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@ -1151,8 +1151,8 @@ static void eprom_get_byte(struct zatm_dev *zatm_dev, unsigned char *byte,
}
static unsigned char eprom_try_esi(struct atm_dev *dev, unsigned short cmd,
int offset, int swap)
static int eprom_try_esi(struct atm_dev *dev, unsigned short cmd, int offset,
int swap)
{
unsigned char buf[ZEPROM_SIZE];
struct zatm_dev *zatm_dev;