system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-18 01:08:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

habanalabs: fix double unlock on error in map_device_va()

Browse source 
If hl_mmu_prefetch_cache_range() fails then this code calls
mutex_unlock(&ctx->mmu_lock) when it's no longer holding the mutex.

Fixes: 9e495e2400 ("habanalabs: do MMU prefetch as deferred work")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Dan Carpenter 2022-05-25 15:25:06 +03:00 committed by Oded Gabbay
parent 7e724422a7
commit a43a9f6777
1 changed files with 2 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/misc/habanalabs/common/memory.c
View file

@ -1245,16 +1245,16 @@ static int map_device_va(struct hl_ctx *ctx, struct hl_mem_in *args, u64 *device
rc = map_phys_pg_pack(ctx, ret_vaddr, phys_pg_pack);
if (rc) {
dev_err(hdev->dev, "mapping page pack failed for handle %u\n", handle);
mutex_unlock(&ctx->mmu_lock);
goto map_err;
}
rc = hl_mmu_invalidate_cache_range(hdev, false, *vm_type | MMU_OP_SKIP_LOW_CACHE_INV,
ctx->asid, ret_vaddr, phys_pg_pack->total_size);
mutex_unlock(&ctx->mmu_lock);
if (rc)
goto map_err;
mutex_unlock(&ctx->mmu_lock);
/*
* prefetch is done upon user's request. it is performed in WQ as and so can
* be outside the MMU lock. the operation itself is already protected by the mmu lock
@ -1283,8 +1283,6 @@ static int map_device_va(struct hl_ctx *ctx, struct hl_mem_in *args, u64 *device
return rc;
map_err:
mutex_unlock(&ctx->mmu_lock);
if (add_va_block(hdev, va_range, ret_vaddr,
ret_vaddr + phys_pg_pack->total_size - 1))
dev_warn(hdev->dev,