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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2012-11-23 13:25:39 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-11-23 13:26:05 +1100 |
| commit | bb4618823a3389086f157fafb2a0d97cade8d89f (patch) | |
| tree | 0485c5a67e6dd65dae4bf0a64122b20159b2aa51 /arch | |
| parent | d6dc24613c222f9057131ccbd5264a10bcba9f97 (diff) | |
| download | linux-stable-bb4618823a3389086f157fafb2a0d97cade8d89f.tar.gz linux-stable-bb4618823a3389086f157fafb2a0d97cade8d89f.tar.bz2 linux-stable-bb4618823a3389086f157fafb2a0d97cade8d89f.zip | |
powerpc/pseries: Fix oops with MSIs when missing EEH PEs
The new EEH code introduced a small regression, if the EEH PEs
are missin (which happens currently in qemu for example), it
will deref a NULL pointer in the MSI code.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/pseries/msi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index d19f4977c834..e5b084723131 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -220,7 +220,8 @@ static struct device_node *find_pe_dn(struct pci_dev *dev, int *total) /* Get the top level device in the PE */ edev = of_node_to_eeh_dev(dn); - edev = list_first_entry(&edev->pe->edevs, struct eeh_dev, list); + if (edev->pe) + edev = list_first_entry(&edev->pe->edevs, struct eeh_dev, list); dn = eeh_dev_to_of_node(edev); if (!dn) return NULL; |