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| author | Alexander Stein <alexander.stein@systec-electronic.com> | 2011-07-25 17:11:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:07 -0700 |
| commit | 2b934c6236983392d01bef22e43af3051cac16f5 (patch) | |
| tree | c7901f1c9392f8ebb99f0cfda871863e0c2d5500 /drivers/misc/pch_phub.c | |
| parent | 90b03f5052be92ab0ba0aa36abcf33a207706866 (diff) | |
| download | lwn-2b934c6236983392d01bef22e43af3051cac16f5.tar.gz lwn-2b934c6236983392d01bef22e43af3051cac16f5.zip | |
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 <alexander.stein@systec-electronic.com>
Cc: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Cc: Greg KH <gregkh@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/pch_phub.c')
| -rw-r--r-- | 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 5fe79df44838..01eb67b4871a 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 | |