dmaengine: dmatest: move size checks earlier in function

dmaengine: dmatest: move size checks earlier in function

[Alexandru Ardelean]

There's no need to allocate all that memory if these sizes are invalid
anyway.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
 drivers/dma/dmatest.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index aa1712beb0cc..fa991e095ef2 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -507,6 +507,19 @@ static int dmatest_func(void *data)
 	} else
 		goto err_thread_type;
 
+	/* Check if buffer count fits into map count variable (u8) */
+	if ((src_cnt + dst_cnt) >= 255) {
+		pr_err("too many buffers (%d of 255 supported)\n",
+		       src_cnt + dst_cnt);
+		goto err_thread_type;
+	}
+
+	if (1 << align > params->buf_size) {
+		pr_err("%u-byte buffer too small for %d-byte alignment\n",
+		       params->buf_size, 1 << align);
+		goto err_thread_type;
+	}
+
 	thread->srcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL);
 	if (!thread->srcs)
 		goto err_srcs;
@@ -576,19 +589,6 @@ static int dmatest_func(void *data)
 
 		total_tests++;
 
-		/* Check if buffer count fits into map count variable (u8) */
-		if ((src_cnt + dst_cnt) >= 255) {
-			pr_err("too many buffers (%d of 255 supported)\n",
-			       src_cnt + dst_cnt);
-			break;
-		}
-
-		if (1 << align > params->buf_size) {
-			pr_err("%u-byte buffer too small for %d-byte alignment\n",
-			       params->buf_size, 1 << align);
-			break;
-		}
-
 		if (params->norandom)
 			len = params->buf_size;
 		else

dmaengine: dmatest: move size checks earlier in function

[Vinod Koul]

On 01-11-18, 18:07, Alexandru Ardelean wrote:
> There's no need to allocate all that memory if these sizes are invalid
> anyway.

Applied, thanks