linux-kernel - [PATCH 1/2] staging: android: ion: Deletion of unnecessary checks before two function calls

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Date:	Sun, 23 Nov 2014 19:39:23 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	devel@...verdev.osuosl.org, linux-tegra@...r.kernel.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 1/2] staging: android: ion: Deletion of unnecessary checks
 before two function calls

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 23 Nov 2014 18:48:15 +0100

The functions ion_heap_destroy() and vfree() perform also input
parameter validation. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/staging/android/ion/ion.c              | 6 ++----
 drivers/staging/android/ion/ion_dummy_driver.c | 6 ++----
 drivers/staging/android/ion/tegra/tegra_ion.c  | 6 ++----
 3 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index 2703609..df12cc3 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -263,8 +263,7 @@ err:
 	heap->ops->unmap_dma(heap, buffer);
 	heap->ops->free(buffer);
 err1:
-	if (buffer->pages)
-		vfree(buffer->pages);
+	vfree(buffer->pages);
 err2:
 	kfree(buffer);
 	return ERR_PTR(ret);
@@ -276,8 +275,7 @@ void ion_buffer_destroy(struct ion_buffer *buffer)
 		buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
 	buffer->heap->ops->unmap_dma(buffer->heap, buffer);
 	buffer->heap->ops->free(buffer);
-	if (buffer->pages)
-		vfree(buffer->pages);
+	vfree(buffer->pages);
 	kfree(buffer);
 }
 
diff --git a/drivers/staging/android/ion/ion_dummy_driver.c b/drivers/staging/android/ion/ion_dummy_driver.c
index 3a45e79..d06bf52 100644
--- a/drivers/staging/android/ion/ion_dummy_driver.c
+++ b/drivers/staging/android/ion/ion_dummy_driver.c
@@ -112,10 +112,8 @@ static int __init ion_dummy_init(void)
 	}
 	return 0;
 err:
-	for (i = 0; i < dummy_ion_pdata.nr; i++) {
-		if (heaps[i])
-			ion_heap_destroy(heaps[i]);
-	}
+	for (i = 0; i < dummy_ion_pdata.nr; ++i)
+		ion_heap_destroy(heaps[i]);
 	kfree(heaps);
 
 	if (carveout_ptr) {
diff --git a/drivers/staging/android/ion/tegra/tegra_ion.c b/drivers/staging/android/ion/tegra/tegra_ion.c
index 11c7cce..5b8ef0e 100644
--- a/drivers/staging/android/ion/tegra/tegra_ion.c
+++ b/drivers/staging/android/ion/tegra/tegra_ion.c
@@ -54,10 +54,8 @@ static int tegra_ion_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, idev);
 	return 0;
 err:
-	for (i = 0; i < num_heaps; i++) {
-		if (heaps[i])
-			ion_heap_destroy(heaps[i]);
-	}
+	for (i = 0; i < num_heaps; ++i)
+		ion_heap_destroy(heaps[i]);
 	return err;
 }
 
-- 
2.1.3

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