From: Arnd Bergmann arnd@arndb.de
The new driver incorrectly unwinds after errors, as clang points out:
drivers/dma-buf/st-dma-resv.c:295:7: error: variable 'i' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (r) { ^ drivers/dma-buf/st-dma-resv.c:336:9: note: uninitialized use occurs here while (i--) ^ drivers/dma-buf/st-dma-resv.c:295:3: note: remove the 'if' if its condition is always false if (r) { ^~~~~~~~ drivers/dma-buf/st-dma-resv.c:288:6: error: variable 'i' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (r) { ^ drivers/dma-buf/st-dma-resv.c:336:9: note: uninitialized use occurs here while (i--) ^ drivers/dma-buf/st-dma-resv.c:288:2: note: remove the 'if' if its condition is always false if (r) { ^~~~~~~~ drivers/dma-buf/st-dma-resv.c:280:10: note: initialize the variable 'i' to silence this warning int r, i; ^ = 0
Skip cleaning up the bits that have not been allocated at this point.
Fixes: 1d51775cd3f5 ("dma-buf: add dma_resv selftest v4") Signed-off-by: Arnd Bergmann arnd@arndb.de --- I'm not familiar with these interfaces, so I'm just guessing where we should jump after an error, please double-check and fix if necessary. --- drivers/dma-buf/st-dma-resv.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma-buf/st-dma-resv.c b/drivers/dma-buf/st-dma-resv.c index 6f3ba756da3e..bc32b3eedcb6 100644 --- a/drivers/dma-buf/st-dma-resv.c +++ b/drivers/dma-buf/st-dma-resv.c @@ -287,7 +287,7 @@ static int test_get_fences(void *arg, bool shared) r = dma_resv_lock(&resv, NULL); if (r) { pr_err("Resv locking failed\n"); - goto err_free; + goto err_resv; }
if (shared) { @@ -295,7 +295,7 @@ static int test_get_fences(void *arg, bool shared) if (r) { pr_err("Resv shared slot allocation failed\n"); dma_resv_unlock(&resv); - goto err_free; + goto err_resv; }
dma_resv_add_shared_fence(&resv, f); @@ -336,6 +336,7 @@ static int test_get_fences(void *arg, bool shared) while (i--) dma_fence_put(fences[i]); kfree(fences); +err_resv: dma_resv_fini(&resv); dma_fence_put(f); return r;