diff options
| author | Christoph Fritz <chf.fritz@googlemail.com> | 2010-05-28 10:45:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 10:54:18 -0700 |
| commit | a8515c84db1a9c9be19d8d873b059473474b6dab (patch) | |
| tree | ece82aba38a13ece63125bc9545429b1b0d77889 | |
| parent | 3ca696ca403b2715018bd5c693ab105c3a3ea888 (diff) | |
ssb: fix NULL ptr deref when pcihost_wrapper is used
commit da1fdb02d9200ff28b6f3a380d21930335fe5429 upstream.
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>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 bb03a3635285..abb040f62e7a 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; |