net: usb: sr9800: fix uninitialized local variable
Make sure res does not contain random value if the call to sr_read_cmd fails for some reason. Reported-by: syzbot+f1842130bbcfb335bac1@syzkaller.appspotmail.com Signed-off-by: NValentin Vidic <vvidic@valentin-vidic.from.hr> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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