[PATCH 5.4 147/154] ntb_perf: Delete duplicate dmaengine_unmap_put() call in perf_copy_chunk()

Greg Kroah-Hartman
2025-04-08T12:08:52Z

From: Markus Elfring <elfring@users.sourceforge.net>

commit 4279e72cab31dd3eb8c89591eb9d2affa90ab6aa upstream.

The function call “dmaengine_unmap_put(unmap)” was used in an if branch.
The same call was immediately triggered by a subsequent goto statement.
Thus avoid such a call repetition.

This issue was detected by using the Coccinelle software.

Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support")
Cc: stable@vger.kernel.org
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/ntb/test/ntb_perf.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -838,10 +838,8 @@ static int perf_copy_chunk(struct perf_t
dma_set_unmap(tx, unmap);

ret = dma_submit_error(dmaengine_submit(tx));
- if (ret) {
- dmaengine_unmap_put(unmap);
+ if (ret)
goto err_free_resource;
- }

dmaengine_unmap_put(unmap);