linux-kernel - [PATCH 5/15] skeletonfb: check fb_alloc_cmap return value and handle failure properly

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Message-ID: <20090207121302.55db6a87@ephemeral>
Date:	Sat, 7 Feb 2009 12:13:02 -0500
From:	Andres Salomon <dilinger@...ued.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-fbdev-devel@...ts.sourceforge.net, adaplas@...il.com
Subject: [PATCH 5/15] skeletonfb: check fb_alloc_cmap return value and
 handle failure properly


Bad example code, no cookie!

Signed-off-by: Andres Salomon <dilinger@...ian.org>
---
 drivers/video/skeletonfb.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/video/skeletonfb.c b/drivers/video/skeletonfb.c
index df53365..a439159 100644
--- a/drivers/video/skeletonfb.c
+++ b/drivers/video/skeletonfb.c
@@ -795,8 +795,9 @@ static int __devinit xxxfb_probe(struct pci_dev *dev,
     if (!retval || retval == 4)
 	return -EINVAL;			
 
-    /* This has to been done !!! */	
-    fb_alloc_cmap(&info->cmap, cmap_len, 0);
+    /* This has to be done! */
+    if (fb_alloc_cmap(&info->cmap, cmap_len, 0))
+	return -ENOMEM;
 	
     /* 
      * The following is done in the case of having hardware with a static 
@@ -820,8 +821,10 @@ static int __devinit xxxfb_probe(struct pci_dev *dev,
      */
     /* xxxfb_set_par(info); */
 
-    if (register_framebuffer(info) < 0)
+    if (register_framebuffer(info) < 0) {
+	fb_dealloc_cmap(&info->cmap);
 	return -EINVAL;
+    }
     printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
 	   info->fix.id);
     pci_set_drvdata(dev, info); /* or platform_set_drvdata(pdev, info) */
-- 
1.5.6.5

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