ssb: fix NULL ptr deref when pcihost_wrapper is used
commita8515c84db1a9c9be19d8d873b059473474b6dab
authorChristoph Fritz <chf.fritz@googlemail.com>
Fri, 28 May 2010 08:45:59 +0000 (28 10:45 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 10 Aug 2010 17:54:18 +0000 (10 10:54 -0700)
treeece82aba38a13ece63125bc9545429b1b0d77889
parent3ca696ca403b2715018bd5c693ab105c3a3ea888
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>
drivers/ssb/pci.c
drivers/ssb/sprom.c