[AGPGART] Fix agp=off.

agp=off disabled the agpgart driver, but not the chipset specific drivers,
which still did their init routines. Chaos ensued.
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/char/agp/ali-agp.c

@@ -396,6 +396,8 @@ static struct pci_driver agp_ali_pci_driver = {
 
 static int __init agp_ali_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_ali_pci_driver);
 }
 

drivers/char/agp/alpha-agp.c

@@ -195,6 +195,8 @@ alpha_core_agp_setup(void)
 
 static int __init agp_alpha_core_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	if (alpha_mv.agp_info)
 		return alpha_core_agp_setup();
 	return -ENODEV;

drivers/char/agp/amd-k7-agp.c

@@ -478,6 +478,8 @@ static struct pci_driver agp_amdk7_pci_driver = {
 
 static int __init agp_amdk7_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_amdk7_pci_driver);
 }
 

drivers/char/agp/ati-agp.c

@@ -529,6 +529,8 @@ static struct pci_driver agp_ati_pci_driver = {
 
 static int __init agp_ati_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_ati_pci_driver);
 }
 

drivers/char/agp/efficeon-agp.c

@@ -441,6 +441,9 @@ static int __init agp_efficeon_init(void)
 {
 	static int agp_initialised=0;
 
+	if (agp_off)
+		return -EINVAL;
+
 	if (agp_initialised == 1)
 		return 0;
 	agp_initialised=1;

drivers/char/agp/hp-agp.c

@@ -524,6 +524,8 @@ zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret)
 static int __init
 agp_hp_init (void)
 {
+	if (agp_off)
+		return -EINVAL;
 
 	acpi_get_devices("HWP0003", zx1_gart_probe, "HWP0003", NULL);
 	if (hp_zx1_gart_found)

drivers/char/agp/i460-agp.c

@@ -622,6 +622,8 @@ static struct pci_driver agp_intel_i460_pci_driver = {
 
 static int __init agp_intel_i460_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_intel_i460_pci_driver);
 }
 

drivers/char/agp/nvidia-agp.c

@@ -405,6 +405,8 @@ static struct pci_driver agp_nvidia_pci_driver = {
 
 static int __init agp_nvidia_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_nvidia_pci_driver);
 }
 

drivers/char/agp/sis-agp.c

@@ -340,6 +340,8 @@ static struct pci_driver agp_sis_pci_driver = {
 
 static int __init agp_sis_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_sis_pci_driver);
 }
 

drivers/char/agp/sworks-agp.c

@@ -539,6 +539,8 @@ static struct pci_driver agp_serverworks_pci_driver = {
 
 static int __init agp_serverworks_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_serverworks_pci_driver);
 }
 

drivers/char/agp/uninorth-agp.c

@@ -373,6 +373,8 @@ static struct pci_driver agp_uninorth_pci_driver = {
 
 static int __init agp_uninorth_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_uninorth_pci_driver);
 }
 

drivers/char/agp/via-agp.c

@@ -523,6 +523,8 @@ static struct pci_driver agp_via_pci_driver = {
 
 static int __init agp_via_init(void)
 {
+	if (agp_off)
+		return -EINVAL;
 	return pci_module_init(&agp_via_pci_driver);
 }