diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index ea3a5e1791e9f3dcd17deddf0333a3f4757a2ff6..73702e583eb986c61ab2fe1dee4ca63d8584e7df 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -690,7 +690,7 @@ shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length, page_length); kunmap_atomic(vaddr); - return ret; + return ret ? -EFAULT : 0; } /* Only difference to the fast-path function is that this can handle bit17 @@ -724,7 +724,7 @@ shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length, page_do_bit17_swizzling); kunmap(page); - return ret; + return ret ? -EFAULT : 0; } static int @@ -733,7 +733,6 @@ i915_gem_shmem_pwrite(struct drm_device *dev, struct drm_i915_gem_pwrite *args, struct drm_file *file) { - struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping; ssize_t remain; loff_t offset; char __user *user_data; @@ -742,7 +741,6 @@ i915_gem_shmem_pwrite(struct drm_device *dev, int hit_slowpath = 0; int needs_clflush_after = 0; int needs_clflush_before = 0; - int release_page; user_data = (char __user *) (uintptr_t) args->data_ptr; remain = args->size; @@ -768,6 +766,12 @@ i915_gem_shmem_pwrite(struct drm_device *dev, && obj->cache_level == I915_CACHE_NONE) needs_clflush_before = 1; + ret = i915_gem_object_get_pages(obj); + if (ret) + return ret; + + i915_gem_object_pin_pages(obj); + offset = args->offset; obj->dirty = 1; @@ -793,18 +797,7 @@ i915_gem_shmem_pwrite(struct drm_device *dev, ((shmem_page_offset | page_length) & (boot_cpu_data.x86_clflush_size - 1)); - if (obj->pages) { - page = obj->pages[offset >> PAGE_SHIFT]; - release_page = 0; - } else { - page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT); - if (IS_ERR(page)) { - ret = PTR_ERR(page); - goto out; - } - release_page = 1; - } - + page = obj->pages[offset >> PAGE_SHIFT]; page_do_bit17_swizzling = obj_do_bit17_swizzling && (page_to_phys(page) & (1 << 17)) != 0; @@ -816,26 +809,20 @@ i915_gem_shmem_pwrite(struct drm_device *dev, goto next_page; hit_slowpath = 1; - page_cache_get(page); mutex_unlock(&dev->struct_mutex); - ret = shmem_pwrite_slow(page, shmem_page_offset, page_length, user_data, page_do_bit17_swizzling, partial_cacheline_write, needs_clflush_after); mutex_lock(&dev->struct_mutex); - page_cache_release(page); + next_page: set_page_dirty(page); mark_page_accessed(page); - if (release_page) - page_cache_release(page); - if (ret) { - ret = -EFAULT; + if (ret) goto out; - } remain -= page_length; user_data += page_length; @@ -843,6 +830,8 @@ i915_gem_shmem_pwrite(struct drm_device *dev, } out: + i915_gem_object_unpin_pages(obj); + if (hit_slowpath) { /* Fixup: Kill any reinstated backing storage pages */ if (obj->madv == __I915_MADV_PURGED)