linux-kernel - [PATCH] drm/tegra: Delete an unnecessary check before the function call "vunmap"

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Date:	Sat, 16 Jul 2016 07:30:33 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-tegra@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Terje Bergström <tbergstrom@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	David Airlie <airlied@...ux.ie>,
	Alexandre Courbot <gnurou@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] drm/tegra: Delete an unnecessary check before the function
 call "vunmap"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 16 Jul 2016 07:23:42 +0200

The vunmap() function performs 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/gpu/drm/tegra/fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index 1b12aa7..e6d71fa 100644
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -68,7 +68,7 @@ static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
 		struct tegra_bo *bo = fb->planes[i];
 
 		if (bo) {
-			if (bo->pages && bo->vaddr)
+			if (bo->pages)
 				vunmap(bo->vaddr);
 
 			drm_gem_object_unreference_unlocked(&bo->gem);
-- 
2.9.1