linux-kernel - [PATCH] pch_phub: Don't panic if dmi_get_system

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Date:	Wed,  1 Jun 2011 08:44:29 +0200
From:	Alexander Stein <alexander.stein@...tec-electronic.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Stein <alexander.stein@...tec-electronic.com>
Subject: [PATCH] pch_phub: Don't panic if dmi_get_system_info returns NULL

Signed-off-by: Alexander Stein <alexander.stein@...tec-electronic.com>
---
 drivers/misc/pch_phub.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c
index 5fe79df..01eb67b 100644
--- a/drivers/misc/pch_phub.c
+++ b/drivers/misc/pch_phub.c
@@ -686,6 +686,8 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev,
 	}
 
 	if (id->driver_data == 1) { /* EG20T PCH */
+		const char *board_name;
+
 		retval = sysfs_create_file(&pdev->dev.kobj,
 					   &dev_attr_pch_mac.attr);
 		if (retval)
@@ -701,7 +703,8 @@ static int __devinit pch_phub_probe(struct pci_dev *pdev,
 					       CLKCFG_CANCLK_MASK);
 
 		/* quirk for CM-iTC board */
-		if (strstr(dmi_get_system_info(DMI_BOARD_NAME), "CM-iTC"))
+		board_name = dmi_get_system_info(DMI_BOARD_NAME);
+		if (board_name && strstr(board_name, "CM-iTC"))
 			pch_phub_read_modify_write_reg(chip,
 						(unsigned int)CLKCFG_REG_OFFSET,
 						CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
-- 
1.7.3.4

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