From 2b934c6236983392d01bef22e43af3051cac16f5 Mon Sep 17 00:00:00 2001 From: Alexander Stein Date: Mon, 25 Jul 2011 17:11:54 -0700 Subject: drivers/misc/pch_phub.c: don't oops if dmi_get_system_info returns NULL 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 Cc: Tomoya MORINAGA Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/misc/pch_phub.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 | -- cgit v1.1