dmaengine: dmatest: move test data alloc & free into functions

This patch starts to take advantage of the `dmatest_data` struct by moving
the common allocation & free-ing bits into functions.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/dmatest.c

@@ -486,6 +486,53 @@ static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len)
 	return FIXPT_TO_INT(dmatest_persec(runtime, len >> 10));
 }
 
+static void __dmatest_free_test_data(struct dmatest_data *d, unsigned int cnt)
+{
+	unsigned int i;
+
+	for (i = 0; i < cnt; i++)
+		kfree(d->raw[i]);
+
+	kfree(d->aligned);
+	kfree(d->raw);
+}
+
+static void dmatest_free_test_data(struct dmatest_data *d)
+{
+	__dmatest_free_test_data(d, d->cnt);
+}
+
+static int dmatest_alloc_test_data(struct dmatest_data *d,
+		unsigned int buf_size, u8 align)
+{
+	unsigned int i = 0;
+
+	d->raw = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL);
+	if (!d->raw)
+		return -ENOMEM;
+
+	d->aligned = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL);
+	if (!d->aligned)
+		goto err;
+
+	for (i = 0; i < d->cnt; i++) {
+		d->raw[i] = kmalloc(buf_size + align, GFP_KERNEL);
+		if (!d->raw[i])
+			goto err;
+
+		/* align to alignment restriction */
+		if (align)
+			d->aligned[i] = PTR_ALIGN(d->raw[i], align);
+		else
+			d->aligned[i] = d->raw[i];
+	}
+
+	return 0;
+err:
+	__dmatest_free_test_data(d, i);
+	return -ENOMEM;
+}
+
 /*
  * This function repeatedly tests DMA transfers of various lengths and
  * offsets for a given operation type until it is told to exit by
@@ -588,55 +635,17 @@ static int dmatest_func(void *data)
 		goto err_free_coefs;
 	}
 
-	src->aligned = kcalloc(src->cnt + 1, sizeof(u8 *), GFP_KERNEL);
-	if (!src->aligned)
+	if (dmatest_alloc_test_data(src, buf_size, align) < 0)
 		goto err_free_coefs;
 
-	src->raw = kcalloc(src->cnt + 1, sizeof(u8 *), GFP_KERNEL);
-	if (!src->raw)
-		goto err_usrcs;
-
-	for (i = 0; i < src->cnt; i++) {
-		src->raw[i] = kmalloc(buf_size + align,
-					   GFP_KERNEL);
-		if (!src->raw[i])
-			goto err_srcbuf;
-
-		/* align srcs to alignment restriction */
-		if (align)
-			src->aligned[i] = PTR_ALIGN(src->raw[i], align);
-		else
-			src->aligned[i] = src->raw[i];
-	}
-	src->aligned[i] = NULL;
-
-	dst->aligned = kcalloc(dst->cnt + 1, sizeof(u8 *), GFP_KERNEL);
-	if (!dst->aligned)
-		goto err_dsts;
-
-	dst->raw = kcalloc(dst->cnt + 1, sizeof(u8 *), GFP_KERNEL);
-	if (!dst->raw)
-		goto err_udsts;
-
-	for (i = 0; i < dst->cnt; i++) {
-		dst->raw[i] = kmalloc(buf_size + align,
-					   GFP_KERNEL);
-		if (!dst->raw[i])
-			goto err_dstbuf;
-
-		/* align dsts to alignment restriction */
-		if (align)
-			dst->aligned[i] = PTR_ALIGN(dst->raw[i], align);
-		else
-			dst->aligned[i] = dst->raw[i];
-	}
-	dst->aligned[i] = NULL;
+	if (dmatest_alloc_test_data(dst, buf_size, align) < 0)
+		goto err_src;
 
 	set_user_nice(current, 10);
 
 	srcs = kcalloc(src->cnt, sizeof(dma_addr_t), GFP_KERNEL);
 	if (!srcs)
-		goto err_dstbuf;
+		goto err_dst;
 
 	dma_pq = kcalloc(dst->cnt, sizeof(dma_addr_t), GFP_KERNEL);
 	if (!dma_pq)
@@ -865,19 +874,10 @@ static int dmatest_func(void *data)
 	kfree(dma_pq);
 err_srcs_array:
 	kfree(srcs);
-err_dstbuf:
-	for (i = 0; dst->raw[i]; i++)
-		kfree(dst->raw[i]);
-	kfree(dst->raw);
-err_udsts:
-	kfree(dst->aligned);
-err_dsts:
-err_srcbuf:
-	for (i = 0; src->raw[i]; i++)
-		kfree(src->raw[i]);
-	kfree(src->raw);
-err_usrcs:
-	kfree(src->aligned);
+err_dst:
+	dmatest_free_test_data(dst);
+err_src:
+	dmatest_free_test_data(src);
 err_free_coefs:
 	kfree(pq_coefs);
 err_thread_type: