diff options
| author | Christoph Fritz <chf.fritz@googlemail.com> | 2010-05-28 10:45:59 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-05-28 13:57:01 -0400 |
| commit | da1fdb02d9200ff28b6f3a380d21930335fe5429 (patch) | |
| tree | 0d248099b31416aa6f7adcba5c8a259c6363751b /drivers | |
| parent | 368a07d26ae99c80678a968946744fd83e7708d0 (diff) | |
| download | lwn-da1fdb02d9200ff28b6f3a380d21930335fe5429.tar.gz lwn-da1fdb02d9200ff28b6f3a380d21930335fe5429.zip | |
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')
| -rw-r--r-- | drivers/ssb/pci.c | 9 | ||||
| -rw-r--r-- | drivers/ssb/sprom.c | 1 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c index 989e2752cc36..6dcda86be6eb 100644 --- a/drivers/ssb/pci.c +++ b/drivers/ssb/pci.c @@ -625,9 +625,12 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus, ssb_printk(KERN_ERR PFX "No SPROM available!\n"); return -ENODEV; } - - bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ? - SSB_SPROM_BASE1 : SSB_SPROM_BASE31; + if (bus->chipco.dev) { /* can be unavailible! */ + bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ? + SSB_SPROM_BASE1 : SSB_SPROM_BASE31; + } else { + bus->sprom_offset = SSB_SPROM_BASE1; + } buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL); if (!buf) diff --git a/drivers/ssb/sprom.c b/drivers/ssb/sprom.c index 007bc3a03486..4f7cc8d13277 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; |