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[PATCH] sgi-agp: fixes a problem with accessing GART memory in sgi_tioca_insert_memory and sgi_tioca_remove_memory

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This patch fixes a problem with accessing GART memory in
sgi_tioca_insert_memory and sgi_tioca_remove_memory.

 sgi-agp.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

Signed-off-by: Mike Werner <werner@sgi.com>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Michael Werner 2005-03-27 22:08:42 -08:00 committed by Dave Jones
parent d0de98fa16
commit e29b545cb1
1 changed files with 9 additions and 3 deletions
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12
drivers/char/agp/sgi-agp.c
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@ -133,11 +133,14 @@ static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
off_t j; off_t j;
void *temp; void *temp;
struct agp_bridge_data *bridge; struct agp_bridge_data *bridge;
u64 *table;
bridge = mem->bridge; bridge = mem->bridge;
if (!bridge) if (!bridge)
return -EINVAL; return -EINVAL;
table = (u64 *)bridge->gatt_table;
temp = bridge->current_size; temp = bridge->current_size;
switch (bridge->driver->size_type) { switch (bridge->driver->size_type) {
@ -175,7 +178,7 @@ static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
j = pg_start; j = pg_start;
while (j < (pg_start + mem->page_count)) { while (j < (pg_start + mem->page_count)) {
if (*(bridge->gatt_table + j)) if (table[j])
return -EBUSY; return -EBUSY;
j++; j++;
} }
@ -186,7 +189,7 @@ static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
} }
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
*(bridge->gatt_table + j) = table[j] =
bridge->driver->mask_memory(bridge, mem->memory[i], bridge->driver->mask_memory(bridge, mem->memory[i],
mem->type); mem->type);
} }
@ -200,6 +203,7 @@ static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
{ {
size_t i; size_t i;
struct agp_bridge_data *bridge; struct agp_bridge_data *bridge;
u64 *table;
bridge = mem->bridge; bridge = mem->bridge;
if (!bridge) if (!bridge)
@ -209,8 +213,10 @@ static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
return -EINVAL; return -EINVAL;
} }
table = (u64 *)bridge->gatt_table;
for (i = pg_start; i < (mem->page_count + pg_start); i++) { for (i = pg_start; i < (mem->page_count + pg_start); i++) {
*(bridge->gatt_table + i) = 0; table[i] = 0;
} }
bridge->driver->tlb_flush(mem); bridge->driver->tlb_flush(mem);