If dmi_get_system_info() returns NULL, pch_phub_probe() will
dereferencea a zero pointer.
This oops was observed on an Atom based board which has no BIOS, but
a bootloder which doesn't privde DMI data.
Signed-off-by: Alexander Stein <alexander.st...@systec-electronic.com>
---
Changes in v2:
* Adjust summary
* Commit message is more verbose
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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