diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/fsl_qbman/fsl_usdpaa.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/staging/fsl_qbman/fsl_usdpaa.c b/drivers/staging/fsl_qbman/fsl_usdpaa.c index 0e6adca..dbbc80f 100644 --- a/drivers/staging/fsl_qbman/fsl_usdpaa.c +++ b/drivers/staging/fsl_qbman/fsl_usdpaa.c @@ -1009,7 +1009,8 @@ static long ioctl_dma_unmap(struct ctx *ctx, void __user *arg) { struct mem_mapping *map; struct vm_area_struct *vma; - int ret; + int ret, i; + struct mem_fragment *current_frag; down_write(¤t->mm->mmap_sem); vma = find_vma(current->mm, (unsigned long)arg); @@ -1031,6 +1032,13 @@ static long ioctl_dma_unmap(struct ctx *ctx, void __user *arg) } map = NULL; map_match: + current_frag = map->root_frag; + for (i = 0; i < map->frag_count; i++) { + DPA_ASSERT(current_frag->refs > 0); + --current_frag->refs; + current_frag = list_entry(current_frag->list.prev, + struct mem_fragment, list); + } list_del(&map->list); compress_frags(); spin_unlock(&mem_lock); |