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UPSTREAM: usb: typec: tcpm: fix the PD disabled case

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If the PD is disabled for the port, port->pds will be left as NULL,
which causes the following crash during caps intilisation. Fix the
crash.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Call trace:
 tcpm_register_port+0xaec/0xc44
 qcom_pmic_typec_probe+0x1a4/0x254
 platform_probe+0x68/0xc0
 really_probe+0x148/0x2ac
 __driver_probe_device+0x78/0x12c
 driver_probe_device+0xd8/0x160
Bluetooth: hci0: QCA Product ID   :0x0000000a
 __device_attach_driver+0xb8/0x138
 bus_for_each_drv+0x80/0xdc
Bluetooth: hci0: QCA SOC Version  :0x40020150
 __device_attach+0x9c/0x188
 device_initial_probe+0x14/0x20
 bus_probe_device+0xac/0xb0
 deferred_probe_work_func+0x8c/0xc8
 process_one_work+0x1ec/0x51c
 worker_thread+0x1ec/0x3e4
 kthread+0x120/0x124
 ret_from_fork+0x10/0x20

Fixes: cd099cde4ed2 ("usb: typec: tcpm: Support multiple capabilities")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240113-pmi632-typec-v2-5-182d9aa0a5b3@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

BUG: 206108037
(cherry picked from commit f2e5d3de7e1fbf24483e7f996e519b3ebc3935a1)
Change-Id: If3e81f4bc7c22830d8b0e8400b6e2fc8719a7f6b
Signed-off-by: Kyle Tso <kyletso@google.com>
This commit is contained in:
Dmitry Baryshkov 2024-01-13 22:55:48 +02:00 • committed by Kyle Tso
parent ba97ad7b91
commit 1e6c1ca9a2
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/typec/tcpm/tcpm.c
View file

@ -6878,7 +6878,8 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
if (err)
goto out_role_sw_put;
port->typec_caps.pd = port->pds[0];
if (port->pds)
port->typec_caps.pd = port->pds[0];
port->typec_port = typec_register_port(port->dev, &port->typec_caps);
if (IS_ERR(port->typec_port)) {