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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-15 19:18:44 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-15 19:18:44 +0400 |
| commit | 3d06f7a5f74a813cee817c4b30b5e6f0398da0be (patch) | |
| tree | 2bba8ab48e9a3d70ee3161306ea47962543df855 /drivers/char/agp/ali-agp.c | |
| parent | 13626cb91f41df803c54047172bfc7a716e36c2b (diff) | |
| parent | bdc3e603cda3433c2ccc2069d28f7f3cd319cfc6 (diff) | |
| download | linux-3d06f7a5f74a813cee817c4b30b5e6f0398da0be.tar.xz | |
Merge branch 'agp-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/agp-2.6
* 'agp-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/agp-2.6:
fix use after free in amd create gatt pages
AGP fix race condition between unmapping and freeing pages
Diffstat (limited to 'drivers/char/agp/ali-agp.c')
| -rw-r--r-- | drivers/char/agp/ali-agp.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c index 4941ddb78939..aa5ddb716ffb 100644 --- a/drivers/char/agp/ali-agp.c +++ b/drivers/char/agp/ali-agp.c @@ -156,29 +156,34 @@ static void *m1541_alloc_page(struct agp_bridge_data *bridge) return addr; } -static void ali_destroy_page(void * addr) +static void ali_destroy_page(void * addr, int flags) { if (addr) { - global_cache_flush(); /* is this really needed? --hch */ - agp_generic_destroy_page(addr); - global_flush_tlb(); + if (flags & AGP_PAGE_DESTROY_UNMAP) { + global_cache_flush(); /* is this really needed? --hch */ + agp_generic_destroy_page(addr, flags); + global_flush_tlb(); + } else + agp_generic_destroy_page(addr, flags); } } -static void m1541_destroy_page(void * addr) +static void m1541_destroy_page(void * addr, int flags) { u32 temp; if (addr == NULL) return; - global_cache_flush(); + if (flags & AGP_PAGE_DESTROY_UNMAP) { + global_cache_flush(); - pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp); - pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, - (((temp & ALI_CACHE_FLUSH_ADDR_MASK) | - virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN)); - agp_generic_destroy_page(addr); + pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp); + pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, + (((temp & ALI_CACHE_FLUSH_ADDR_MASK) | + virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN)); + } + agp_generic_destroy_page(addr, flags); } |