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authorChristoph Fritz <chf.fritz@googlemail.com>2010-05-28 04:45:59 -0400
committerJohn W. Linville <linville@tuxdriver.com>2010-05-28 13:57:01 -0400
commitda1fdb02d9200ff28b6f3a380d21930335fe5429 (patch)
tree0d248099b31416aa6f7adcba5c8a259c6363751b /drivers/ssb
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')
-rw-r--r--drivers/ssb/pci.c9
-rw-r--r--drivers/ssb/sprom.c1
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,
625 ssb_printk(KERN_ERR PFX "No SPROM available!\n"); 625 ssb_printk(KERN_ERR PFX "No SPROM available!\n");
626 return -ENODEV; 626 return -ENODEV;
627 } 627 }
628 628 if (bus->chipco.dev) { /* can be unavailible! */
629 bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ? 629 bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ?
630 SSB_SPROM_BASE1 : SSB_SPROM_BASE31; 630 SSB_SPROM_BASE1 : SSB_SPROM_BASE31;
631 } else {
632 bus->sprom_offset = SSB_SPROM_BASE1;
633 }
631 634
632 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL); 635 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
633 if (!buf) 636 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)
185 /* this routine differs from specs as we do not access SPROM directly 185 /* this routine differs from specs as we do not access SPROM directly
186 on PCMCIA */ 186 on PCMCIA */
187 if (bus->bustype == SSB_BUSTYPE_PCI && 187 if (bus->bustype == SSB_BUSTYPE_PCI &&
188 bus->chipco.dev && /* can be unavailible! */
188 bus->chipco.dev->id.revision >= 31) 189 bus->chipco.dev->id.revision >= 31)
189 return bus->chipco.capabilities & SSB_CHIPCO_CAP_SPROM; 190 return bus->chipco.capabilities & SSB_CHIPCO_CAP_SPROM;
190 191