[PATCH] dma/dma_map_benchmark: fix fd leak on error and exit

[2564278112]

From: Wang Jiang <jiangwang@xxxxxxxxxx>

Close the file descriptor when ioctl fails and on normal exit
to fix file descriptor leak.

Signed-off-by: Wang Jiang <jiangwang@xxxxxxxxxx>
---
 tools/dma/dma_map_benchmark.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/dma/dma_map_benchmark.c b/tools/dma/dma_map_benchmark.c
index eab0ac611a23..bdb8a837f020 100644
--- a/tools/dma/dma_map_benchmark.c
+++ b/tools/dma/dma_map_benchmark.c
@@ -130,6 +130,7 @@ int main(int argc, char **argv)
 
 	if (ioctl(fd, cmd, &map)) {
 		perror("ioctl");
+		close(fd);
 		exit(1);
 	}
 
@@ -140,5 +141,6 @@ int main(int argc, char **argv)
 	printf("average unmap latency(us):%.1f standard deviation:%.1f\n",
 			map.avg_unmap_100ns/10.0, map.unmap_stddev/10.0);
 
+	close(fd);
 	return 0;
 }
-- 
2.25.1