powerpc/eeh: Null check uses of eeh_pe_bus_get
authorRussell Currey <ruscur@russell.cc>
Mon, 12 Sep 2016 04:17:22 +0000 (14:17 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 22 Sep 2016 21:54:20 +0000 (07:54 +1000)
commit04fec21c06e35b169a83e75a84a015ab4606bf5e
tree88e4eea89c5f8496006d5c25ebc277f57e51c8b3
parenta24553dd02dc6c7d2912af0b4b9c7f833c90e561
powerpc/eeh: Null check uses of eeh_pe_bus_get

eeh_pe_bus_get() can return NULL if a PCI bus isn't found for a given PE.
Some callers don't check this, and can cause a null pointer dereference
under certain circumstances.

Fix this by checking NULL everywhere eeh_pe_bus_get() is called.

Fixes: 8a6b1bc70dbb ("powerpc/eeh: EEH core to handle special event")
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/eeh_driver.c
arch/powerpc/platforms/powernv/eeh-powernv.c