From: Jon Hunter jonathanh@nvidia.com
commit 2e3dd4a6246945bf84ea6f478365d116e661554c upstream.
Commit 7495af930835 ("ARM: multi_v7_defconfig: Enable drivers for DragonBoard 410c") enables the CONFIG_PHY_QCOM_USB_HS for the ARM multi_v7_defconfig. Enabling this Kconfig is causing the kernel to crash on the Tegra20 Ventana platform in the ulpi_match() function.
The Qualcomm USB HS PHY driver that is enabled by CONFIG_PHY_QCOM_USB_HS, registers a ulpi_driver but this driver does not provide an 'id_table', so when ulpi_match() is called on the Tegra20 Ventana platform, it crashes when attempting to deference the id_table pointer which is not valid. The Qualcomm USB HS PHY driver uses device-tree for matching the ULPI driver with the device and so fix this crash by using device-tree for matching if the id_table is not valid.
Fixes: ef6a7bcfb01c ("usb: ulpi: Support device discovery via DT") Cc: stable stable@vger.kernel.org Signed-off-by: Jon Hunter jonathanh@nvidia.com Link: https://lore.kernel.org/r/20220117150039.44058-1-jonathanh@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/common/ulpi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -42,8 +42,11 @@ static int ulpi_match(struct device *dev struct ulpi *ulpi = to_ulpi_dev(dev); const struct ulpi_device_id *id;
- /* Some ULPI devices don't have a vendor id so rely on OF match */ - if (ulpi->id.vendor == 0) + /* + * Some ULPI devices don't have a vendor id + * or provide an id_table so rely on OF match. + */ + if (ulpi->id.vendor == 0 || !drv->id_table) return of_driver_match_device(dev, driver);
for (id = drv->id_table; id->vendor; id++)