diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-07-24 18:29:37 +0100 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-08-01 19:35:14 -0700 |
| commit | 831cd4453598b2c8e193f077023910c6b0c39558 (patch) | |
| tree | 242d8e619cf40f3f760f4a26b16e6344f3ca6cfc | |
| parent | 2bd34f6ca86b5a5f9b749624f73310820e7a93fd (diff) | |
agp/intel: Destroy the scatterlist on allocation failure
A side-effect of being able to use custom page allocations with the
sg_table is that it cannot reap the partially constructed scatterlist if
fails to allocate a page. So we need to call sg_free_table() ourselves
if sg_alloc_table() fails.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc Dave Airlie <airlied@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 0c6d0fe32a21..f804325a735e 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -104,7 +104,7 @@ static int intel_agp_map_memory(struct agp_memory *mem) DBG("try mapping %lu pages\n", (unsigned long)mem->page_count); if (sg_alloc_table(&st, mem->page_count, GFP_KERNEL)) - return -ENOMEM; + goto err; mem->sg_list = sg = st.sgl; @@ -113,11 +113,14 @@ static int intel_agp_map_memory(struct agp_memory *mem) mem->num_sg = pci_map_sg(intel_private.pcidev, mem->sg_list, mem->page_count, PCI_DMA_BIDIRECTIONAL); - if (unlikely(!mem->num_sg)) { - intel_agp_free_sglist(mem); - return -ENOMEM; - } + if (unlikely(!mem->num_sg)) + goto err; + return 0; + +err: + sg_free_table(&st); + return -ENOMEM; } static void intel_agp_unmap_memory(struct agp_memory *mem) |