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authorChristoph Fritz <chf.fritz@googlemail.com>2010-05-28 10:45:59 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-05-28 13:57:01 -0400
commitda1fdb02d9200ff28b6f3a380d21930335fe5429 (patch)
tree0d248099b31416aa6f7adcba5c8a259c6363751b /drivers/ssb/sprom.c
parent368a07d26ae99c80678a968946744fd83e7708d0 (diff)
ssb: fix NULL ptr deref when pcihost_wrapper is used
Ethernet driver b44 does register ssb by it's pcihost_wrapper and doesn't set ssb_chipcommon. A check on this value introduced with commit d53cdbb94a52a920d5420ed64d986c3523a56743 and ea2db495f92ad2cf3301623e60cb95b4062bc484 triggers: BUG: unable to handle kernel NULL pointer dereference at 00000010 IP: [<c1266c36>] ssb_is_sprom_available+0x16/0x30 Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb/sprom.c')
-rw-r--r--drivers/ssb/sprom.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/ssb/sprom.c b/drivers/ssb/sprom.c
index 007bc3a0348..4f7cc8d1327 100644
--- a/drivers/ssb/sprom.c
+++ b/drivers/ssb/sprom.c
@@ -185,6 +185,7 @@ bool ssb_is_sprom_available(struct ssb_bus *bus)
/* this routine differs from specs as we do not access SPROM directly
on PCMCIA */
if (bus->bustype == SSB_BUSTYPE_PCI &&
+ bus->chipco.dev && /* can be unavailible! */
bus->chipco.dev->id.revision >= 31)
return bus->chipco.capabilities & SSB_CHIPCO_CAP_SPROM;