add ssb followup fixlet found in F-12 tree

svn path=/dists/sid/linux-2.6/; revision=15459

debian/changelog

@@ -22,6 +22,7 @@ linux-2.6 (2.6.32-11) UNRELEASED; urgency=low
   * Update openvz patch to 796e80e5b2ed. (closes: #574598, #575189)
   * [x86]: Disable FB_INTEL. (closes: #447575, #503766, #574401)
   * ssb: do not read SPROM if it does not exist.
+  * ssb: Avoid null pointer dereference by aboves.
 
   [ Bastian Blank ]
   * Update Xen patch.

debian/patches/bugfix/all/ssb_check_for_sprom-fix.patch

@@ -0,0 +1,30 @@
+From ec032742062ad1b01dfe75cfccdbc5b850837c23 Mon Sep 17 00:00:00 2001
+From: John W. Linville <linville@tuxdriver.com>
+Date: Tue, 30 Mar 2010 13:47:39 -0400
+Subject: [PATCH] ssb: avoid null ptr deref in ssb_is_sprom_available
+
+Some older devices don't have chipcommon, but they do have SPROM.
+
+Signed-off-by: John W. Linville <linville@tuxdriver.com>
+---
+ drivers/ssb/sprom.c |    4 ++++
+ 1 files changed, 4 insertions(+), 0 deletions(-)
+
+diff --git a/drivers/ssb/sprom.c b/drivers/ssb/sprom.c
+index 55eb9b0..874d8f1 100644
+--- a/drivers/ssb/sprom.c
++++ b/drivers/ssb/sprom.c
+@@ -178,6 +178,10 @@ const struct ssb_sprom *ssb_get_fallback_sprom(void)
+ 
+ bool ssb_is_sprom_available(struct ssb_bus *bus)
+ {
++	/* some older devices don't have chipcommon, but they have sprom */
++	if (!bus->chipco.dev)
++		return true;
++
+ 	/* status register only exists on chipcomon rev >= 11 */
+ 	if (bus->chipco.dev->id.revision < 11)
+ 		return true;
+-- 
+1.6.2.5
+

debian/patches/series/11

@@ -10,3 +10,4 @@
 + features/all/nouveau-nv50-Implement-ctxprog-state-generation.patch
 + bugfix/all/nouveau-nv50-Make-ctxprog-wait-for-interrupt-handler.patch
 + bugfix/all/nouveau-nv50-Fix-NEWCTX_DONE-flag-number.patch
++ bugfix/all/ssb_check_for_sprom-fix.patch