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PCI: Simplify pci_find_(ext_)capability() return value checks 

The return value of the pci_find_(ext_)capability() is either zero or the
position of a capability.  It is never negative.

This patch consolidates the form of check from (pos <= 0) to (!pos).

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Wei Yang 2015-06-30 09:16:44 +08:00 committed by Bjorn Helgaas
parent fff905f329
commit 0a1a9b4942
1 changed files with 3 additions and 3 deletions
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6
drivers/pci/pci.c
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@ -971,7 +971,7 @@ static int pci_save_pcix_state(struct pci_dev *dev)
struct pci_cap_saved_state *save_state;
pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
if (pos <= 0)
if (!pos)
return 0;
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
@ -994,7 +994,7 @@ static void pci_restore_pcix_state(struct pci_dev *dev)
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
if (!save_state || pos <= 0)
if (!save_state || !pos)
return;
cap = (u16 *)&save_state->cap.data[0];
@ -2158,7 +2158,7 @@ static int _pci_add_cap_save_buffer(struct pci_dev *dev, u16 cap,
else
pos = pci_find_capability(dev, cap);
if (pos <= 0)
if (!pos)
return 0;
save_state = kzalloc(sizeof(*save_state) + size, GFP_KERNEL);