From 8699be3ef1d71d1c5e11eee239f53573d72515a3 Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Wed, 16 Jun 2010 10:13:52 +0200 Subject: [PATCH] intel_agp: Don't oops with zero stolen memory When "onboard video memory" is set do "disabled" in BIOS on Asus P4P800-VM board (i865G), kernel oopses with memory corruption: https://bugs.freedesktop.org/show_bug.cgi?id=28430 Fix that by cleanly aborting the initialization. Signed-off-by: Ondrej Zary Signed-off-by: Eric Anholt --- drivers/char/agp/intel-gtt.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 9344216183a4..f97122a53ca3 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -797,6 +797,10 @@ static int intel_i830_create_gatt_table(struct agp_bridge_data *bridge) /* we have to call this as early as possible after the MMIO base address is known */ intel_i830_init_gtt_entries(); + if (intel_private.gtt_entries == 0) { + iounmap(intel_private.registers); + return -ENOMEM; + } agp_bridge->gatt_table = NULL; @@ -1279,6 +1283,11 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge) /* we have to call this as early as possible after the MMIO base address is known */ intel_i830_init_gtt_entries(); + if (intel_private.gtt_entries == 0) { + iounmap(intel_private.gtt); + iounmap(intel_private.registers); + return -ENOMEM; + } agp_bridge->gatt_table = NULL; @@ -1387,6 +1396,11 @@ static int intel_i965_create_gatt_table(struct agp_bridge_data *bridge) /* we have to call this as early as possible after the MMIO base address is known */ intel_i830_init_gtt_entries(); + if (intel_private.gtt_entries == 0) { + iounmap(intel_private.gtt); + iounmap(intel_private.registers); + return -ENOMEM; + } agp_bridge->gatt_table = NULL; -- 2.20.1