net: orinoco: add error handling for failed kmalloc().

With flag 'GFP_ATOMIC', probability of allocation failure is more.
Add error handling after kmalloc() call to avoid null dereference.

Signed-off-by: Santosh Nayak <santoshprasadnayak@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/orinoco/main.c b/drivers/net/wireless/orinoco/main.c
index dd6c64a..88e3ad2 100644 (file)
--- a/drivers/net/wireless/orinoco/main.c
+++ b/drivers/net/wireless/orinoco/main.c
@@ -1336,6 +1336,10 @@ static void qbuf_scan(struct orinoco_private *priv, void *buf,
        unsigned long flags;
 
        sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
+       if (!sd) {
+               printk(KERN_ERR "%s: failed to alloc memory\n", __func__);
+               return;
+       }
        sd->buf = buf;
        sd->len = len;
        sd->type = type;
@@ -1353,6 +1357,10 @@ static void qabort_scan(struct orinoco_private *priv)
        unsigned long flags;
 
        sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
+       if (!sd) {
+               printk(KERN_ERR "%s: failed to alloc memory\n", __func__);
+               return;
+       }
        sd->len = -1; /* Abort */
 
        spin_lock_irqsave(&priv->scan_lock, flags);