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3cc12bb83e
The scmi_perf_domain_lookup requires the protocol handle to have the
private data set, which is yet to happen during the fastchannel init
scenario. This results in a NULL pointer dereference. Fix this by using
the pre-populated perf_dom_info to pass on the required information
instead.
| scmi_perf_protocol_init+0x434/0x678
| scmi_get_protocol_instance+0x168/0x29c
| scmi_devres_protocol_instance_get+0x50/0xa0
| scmi_devm_protocol_get+0x20/0x50
| scmi_cpufreq_probe+0x34/0xd4
| scmi_dev_probe+0x28/0x3c
| really_probe+0x148/0x2ac
| __driver_probe_device+0x78/0x12c
| driver_probe_device+0x40/0x160
| __device_attach_driver+0xb8/0x134
| bus_for_each_drv+0x80/0xdc
| __device_attach+0xa8/0x1b0
| device_initial_probe+0x14/0x20
| bus_probe_device+0xa8/0xac
| device_add+0x5cc/0x778
| device_register+0x20/0x30
| __scmi_device_create.part.0+0xec/0x1cc
| scmi_device_create+0x180/0x1c4
| scmi_create_protocol_devices+0x4c/0xb0
| scmi_probe+0x660/0x738
| platform_probe+0x68/0xdc
| really_probe+0x148/0x2ac
| __driver_probe_device+0x78/0x12c
| driver_probe_device+0x40/0x160
| __device_attach_driver+0xb8/0x134
| bus_for_each_drv+0x80/0xdc
| __device_attach+0xa8/0x1b0
| device_initial_probe+0x14/0x20
| bus_probe_device+0xa8/0xac
| deferred_probe_work_func+0x88/0xc0
| process_one_work+0x13c/0x264
| worker_thread+0x32c/0x438
| kthread+0x118/0x11c
| ret_from_fork+0x10/0x20
Fixes: 619bc6e034 ("firmware: arm_scmi: Populate fastchannel info only if set operations are allowed")
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Link: https://lore.kernel.org/r/20231129065748.19871-2-quic_sibis@quicinc.com
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.