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[patch] wireless: ERR_PTR vs null

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iwm_wdev_alloc() returns an ERR_PTR on failure and not null.  It also 
prints its own dev_err() message so I removed that as well.

Compile tested only.  Sorry.  
Found by smatch (http://repo.or.cz/w/smatch.git).

regards,
dan carpenter

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

--- orig/drivers/net/wireless/iwmc3200wifi/netdev.c	2009-07-24 09:56:49.000000000 +0300
+++ devel/drivers/net/wireless/iwmc3200wifi/netdev.c	2009-07-24 09:57:31.000000000 +0300
@@ -106,10 +106,8 @@
 	int ret = 0;
 
 	wdev = iwm_wdev_alloc(sizeof_bus, dev);
-	if (!wdev) {
-		dev_err(dev, "no memory for wireless device instance\n");
-		return ERR_PTR(-ENOMEM);
-	}
+	if (IS_ERR(wdev))
+		return wdev;
 
 	iwm = wdev_to_iwm(wdev);
 	iwm->bus_ops = if_ops;
--
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