agp: balance ioremap checks

patchset against 2.6.23-rc3.
corrects missing ioremap return checks and balancing on iounmap calls, integrated changes per list
recommendations on the original set of patches..

Signed-off-by: Scott Thompson <postfail <at> hushmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c
index 53354bf83af7..75d2aca6353d 100644
--- a/drivers/char/agp/i460-agp.c
+++ b/drivers/char/agp/i460-agp.c
@@ -249,6 +249,10 @@ static int i460_create_gatt_table (struct agp_bridge_data *bridge)
         num_entries = A_SIZE_8(temp)->num_entries;
 
         i460.gatt = ioremap(INTEL_I460_ATTBASE, PAGE_SIZE << page_order);
+        if (!i460.gatt) {
+                printk(KERN_ERR PFX "ioremap failed\n");
+                return -ENOMEM;
+        }
 
         /* These are no good, the should be removed from the agp_bridge strucure... */
         agp_bridge->gatt_table_real = NULL;