diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/uninorth-agp.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c index 703959eba45..4e05021f3f1 100644 --- a/drivers/char/agp/uninorth-agp.c +++ b/drivers/char/agp/uninorth-agp.c @@ -151,9 +151,6 @@ static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start, void *temp; int mask_type; - temp = agp_bridge->current_size; - num_entries = A_SIZE_32(temp)->num_entries; - if (type != mem->type) return -EINVAL; @@ -163,6 +160,12 @@ static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start, return -EINVAL; } + if (mem->page_count == 0) + return 0; + + temp = agp_bridge->current_size; + num_entries = A_SIZE_32(temp)->num_entries; + if ((pg_start + mem->page_count) > num_entries) return -EINVAL; @@ -194,9 +197,6 @@ static int u3_insert_memory(struct agp_memory *mem, off_t pg_start, int type) u32 *gp; int mask_type; - temp = agp_bridge->current_size; - num_entries = A_SIZE_32(temp)->num_entries; - if (type != mem->type) return -EINVAL; @@ -206,6 +206,12 @@ static int u3_insert_memory(struct agp_memory *mem, off_t pg_start, int type) return -EINVAL; } + if (mem->page_count == 0) + return 0; + + temp = agp_bridge->current_size; + num_entries = A_SIZE_32(temp)->num_entries; + if ((pg_start + mem->page_count) > num_entries) return -EINVAL; @@ -234,10 +240,19 @@ int u3_remove_memory(struct agp_memory *mem, off_t pg_start, int type) { size_t i; u32 *gp; + int mask_type; + + if (type != mem->type) + return -EINVAL; - if (type != 0 || mem->type != 0) + mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type); + if (mask_type != 0) { /* We know nothing of memory types */ return -EINVAL; + } + + if (mem->page_count == 0) + return 0; gp = (u32 *) &agp_bridge->gatt_table[pg_start]; for (i = 0; i < mem->page_count; ++i) |