[2.6 patch] USB iowarrior.c: fix check-after-use

The Coverity checker spotted that we have already oops'ed if "dev"
was NULL.

Since "dev" being NULL doesn't seem to be possible here this patch 
removes the NULL check.

Signed-off-by: Adrian Bunk <[email protected]>

---
82a9906788e8bedc6d5adc54046e1713e4a399df 
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 46d9f27..9930b0a 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -351,7 +351,7 @@ static ssize_t iowarrior_write(struct file *file,
 
 	mutex_lock(&dev->mutex);
 	/* verify that the device wasn't unplugged */
-	if (dev == NULL || !dev->present) {
+	if (!dev->present) {
 		retval = -ENODEV;
 		goto exit;
 	}

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