ehci-dbg.c:656 fill_periodic_buffer() warn: variable dereferenced before check 'p.qh' (see line 599)

[Fengguang Wu]

Hi Richard,

FYI, there are new smatch warnings show up in

commit 3807e26d69b9ad3864fe03224ebebc9610d5802e
Author:     Alek Du <alek...@intel.com>
AuthorDate: Tue Jul 14 07:23:29 2009 +0800

drivers/usb/chipidea/../host/ehci-dbg.c:656 fill_periodic_buffer() warn: 
variable dereferenced before check 'p.qh' (see line 599)

vim +656 drivers/usb/chipidea/../host/ehci-dbg.c
   596 
   597                         switch (hc32_to_cpu(ehci, tag)) {
   598                         case Q_TYPE_QH:
   599                                 hw = p.qh->hw;
...
 > 656                                  if (p.qh) {
   657                                          tag = Q_NEXT_TYPE(ehci, 
hw->hw_next);
   658                                          p = p.qh->qh_next;
   659                                  }
   660                                  break;

---
0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu <w...@linux.intel.com>                     Intel Corporation
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