linux-kernel - [ 30/75] tty: serial: altera_uart: Check for NULL platform

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Message-Id: <20120419210305.679571778@linuxfoundation.org>
Date:	Thu, 19 Apr 2012 14:03:33 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Yuriy Kozlov <ykozlov@...usa.com>,
	Tobias Klauser <tklauser@...tanz.ch>
Subject: [ 30/75] tty: serial: altera_uart: Check for NULL platform_data in probe.

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yuriy Kozlov <ykozlov@...usa.com>

commit acede70d6561f2d042d9dbb153d9a3469479c0ed upstream.

Follow altera_jtag_uart.  This fixes a crash if there is a mistake in the DTS.

Signed-off-by: Yuriy Kozlov <ykozlov@...usa.com>
Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/serial/altera_uart.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -555,7 +555,7 @@ static int __devinit altera_uart_probe(s
 	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res_mem)
 		port->mapbase = res_mem->start;
-	else if (platp->mapbase)
+	else if (platp)
 		port->mapbase = platp->mapbase;
 	else
 		return -EINVAL;
@@ -563,7 +563,7 @@ static int __devinit altera_uart_probe(s
 	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (res_irq)
 		port->irq = res_irq->start;
-	else if (platp->irq)
+	else if (platp)
 		port->irq = platp->irq;
 
 	/* Check platform data first so we can override device node data */


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