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PCI: Fix use of uninitialized MPS value 

If "pcie_bus_config == PCIE_BUS_PERFORMANCE", we don't initialize "smpss",
so we pass a pointer to garbage into pcie_bus_configure_set(), where we
compute "mps" based on the garbage.  We then pass the garbage "mps" to
pcie_write_mps(), which ignores it in the PCIE_BUS_PERFORMANCE case.

Coverity isn't smart enough to deduce that we ignore the garbage (it's a
lot to expect from a human, too), so initialize "smpss" to a safe value in
all cases.

Found by Coverity (CID 146454).

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.1
Bjorn Helgaas 2014-04-29 12:51:55 -06:00
parent efdd4070f3
commit 1e358f94c0
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/probe.c
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@ -1617,7 +1617,7 @@ static int pcie_bus_configure_set(struct pci_dev *dev, void *data)
*/
void pcie_bus_configure_settings(struct pci_bus *bus)
{
u8 smpss;
u8 smpss = 0;
if (!bus->self)
return;