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caif: fix a signedness bug in cfpkt_iterate()

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The cfpkt_iterate() function can return -EPROTO on error, but the
function is a u16 so the negative value gets truncated to a positive
unsigned short.  This causes a static checker warning.

The only caller which might care is cffrml_receive(), when it's checking
the frame checksum.  I modified cffrml_receive() so that it never says
-EPROTO is a valid checksum.

Also this isn't ever going to be inlined so I removed the "inline".

Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Dan Carpenter 2015-02-19 12:13:13 +03:00 • committed by David S. Miller
commit 278f7b4fff
3 changed files with 5 additions and 5 deletions
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2
net/caif/cffrml.c
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@ -84,7 +84,7 @@ static int cffrml_receive(struct cflayer *layr, struct cfpkt *pkt)
u16 tmp;
u16 len;
u16 hdrchks;
u16 pktchks;
int pktchks;
struct cffrml *this;
this = container_obj(layr);

6
net/caif/cfpkt_skbuff.c
View file

@ -255,9 +255,9 @@ inline u16 cfpkt_getlen(struct cfpkt *pkt)
return skb->len;
}
inline u16 cfpkt_iterate(struct cfpkt *pkt,
u16 (*iter_func)(u16, void *, u16),
u16 data)
int cfpkt_iterate(struct cfpkt *pkt,
u16 (*iter_func)(u16, void *, u16),
u16 data)
{
/*
* Don't care about the performance hit of linearizing,