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[media] m920x: let GCC see 'ret' is used initialized

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Since commit 7543f344e9 ("[media] m920x:
factor out a m920x_write_seq() function") building m920x.o triggers this
GCC warning:
    drivers/media/usb/dvb-usb/m920x.c: In function ‘m920x_probe’:
    drivers/media/usb/dvb-usb/m920x.c:91:6: warning: ‘ret’ may be used uninitialized in this function [-Wuninitialized]
This warning is caused by m920x_write_seq(), which is apparently inlined
into m920x_probe(). It is clear why GCC thinks 'ret' may be used
uninitialized. But in practice the first seq->address will always be
non-zero when this function is called. That means we can change the
while()-do{} loop into a do{}-while() loop. And that suffices to make
GCC see that 'ret' will not be used uninitialized.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Paul Bolle 2013-03-04 09:43:20 -03:00 committed by Mauro Carvalho Chehab
parent 445ba89f1c
commit b78a1f3722
1 changed files with 2 additions and 2 deletions
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4
drivers/media/usb/dvb-usb/m920x.c
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@ -68,13 +68,13 @@ static inline int m920x_write_seq(struct usb_device *udev, u8 request,
struct m920x_inits *seq)
{
int ret;
while (seq->address) {
do {
ret = m920x_write(udev, request, seq->data, seq->address);
if (ret != 0)
return ret;
seq++;
}
} while (seq->address);
return ret;
}