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[media] mb86a20s: apply mask to val after checking for read failure

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Appling the mask 0x0f to the immediate return of the call to
mb86a20s_readreg will always result in a positive value, meaning that the
check of ret < 0 will never work.  Instead, check for a -ve return value
first, and then mask val with 0x0f.

Kudos to Mauro Carvalho Chehab for spotting the mistake in my original fix.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Colin Ian King 2016-07-15 12:59:15 -03:00 committed by Mauro Carvalho Chehab
parent 785ef73dba
commit eca2d34b9d
1 changed files with 2 additions and 1 deletions
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3
drivers/media/dvb-frontends/mb86a20s.c
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@ -301,10 +301,11 @@ static int mb86a20s_read_status(struct dvb_frontend *fe, enum fe_status *status)
*status = 0;
val = mb86a20s_readreg(state, 0x0a) & 0xf;
val = mb86a20s_readreg(state, 0x0a);
if (val < 0)
return val;
val &= 0xf;
if (val >= 2)
*status |= FE_HAS_SIGNAL;