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author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2013-09-02 10:30:25 (GMT) |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-09-02 10:59:40 (GMT) |
commit | af65cfe9aeae03e0682bebdf4db94582d75562dd (patch) | |
tree | 197c7560e4510c4712a8ae3dddc283705a88f8c9 /drivers/usb | |
parent | 524f42fab787a9510be826ce3d736b56d454ac6d (diff) | |
download | linux-fsl-qoriq-af65cfe9aeae03e0682bebdf4db94582d75562dd.tar.xz |
ACPI / LPSS: don't crash if a device has no MMIO resources
Intel LPSS devices that are enumerated from ACPI have both MMIO and IRQ
resources returned in their _CRS method. However, Apple Macbook Air with
Haswell has LPSS devices enumerated from PCI bus instead and _CRS method
returns only an interrupt number (but the device has _HID set that causes
the scan handler to match it).
The current ACPI / LPSS code sets pdata->dev_desc only when MMIO resource
is found for the device and in case of Macbook Air it is never found. That
leads to a NULL pointer dereference in register_device_clock().
Correct this by always setting the pdata->dev_desc.
Reported-and-tested-by: Imre Kaloz <kaloz@openwrt.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/usb')
0 files changed, 0 insertions, 0 deletions