[PATCH v2] p54spi: fix potential null deref in p54spi.c

[Christian Lamparter <chunkeey@web.de>]

From: Dan Carpenter <error27@gmail.com>

Fix a potential NULL dereference bug during 
error handling in p54spi_probe.

This bug was discovered by smatch:
(http://repo.or.cz/w/smatch.git).

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
---
On Sunday 19 July 2009 13:53:57 Dan Carpenter wrote:

> We can't use dev_err() becuase "priv" is NULL.
yep, but that's my fault and not Micheal's.

> Found by smatch (http://repo.or.cz/w/smatch.git).
> regards,
> dan carpenter
what about this alternative?
it retains the dev_err by simply moving to the spi_device *spi
which comes from spi-subsystem and is initialized?

Regards,
	Chr
---
diff --git a/drivers/net/wireless/p54/p54spi.c b/drivers/net/wireless/p54/p54spi.c
index d5f181a..eef5329 100644
--- a/drivers/net/wireless/p54/p54spi.c
+++ b/drivers/net/wireless/p54/p54spi.c
@@ -600,7 +600,7 @@ static int __devinit p54spi_probe(struct spi_device *spi)
 
 	hw = p54_init_common(sizeof(*priv));
 	if (!hw) {
-		dev_err(&priv->spi->dev, "could not alloc ieee80211_hw");
+		dev_err(&spi->dev, "could not alloc ieee80211_hw");
 		return -ENOMEM;
 	}