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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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75 lines
3.2 KiB
Plaintext
75 lines
3.2 KiB
Plaintext
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Contributions are solicited in particular to remedy the following issues:
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cpcihp:
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* There are no implementations of the ->hardware_test, ->get_power and
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->set_power callbacks in struct cpci_hp_controller_ops. Why were they
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introduced? Can they be removed from the struct?
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cpqphp:
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* The driver spawns a kthread cpqhp_event_thread() which is woken by the
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hardirq handler cpqhp_ctrl_intr(). Convert this to threaded IRQ handling.
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The kthread is also woken from the timer pushbutton_helper_thread(),
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convert it to call irq_wake_thread(). Use pciehp as a template.
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* A large portion of cpqphp_ctrl.c and cpqphp_pci.c concerns resource
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management. Doesn't this duplicate functionality in the core?
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ibmphp:
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* Implementations of hotplug_slot_ops callbacks such as get_adapter_present()
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in ibmphp_core.c create a copy of the struct slot on the stack, then perform
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the actual operation on that copy. Determine if this overhead is necessary,
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delete it if not. The functions also perform a NULL pointer check on the
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struct hotplug_slot, this seems superfluous.
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* Several functions access the pci_slot member in struct hotplug_slot even
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though pci_hotplug.h declares it private. See get_max_bus_speed() for an
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example. Either the pci_slot member should no longer be declared private
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or ibmphp should store a pointer to its bus in struct slot. Probably the
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former.
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* The functions get_max_adapter_speed() and get_bus_name() are commented out.
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Can they be deleted? There are also forward declarations at the top of
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ibmphp_core.c as well as pointers in ibmphp_hotplug_slot_ops, likewise
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commented out.
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* ibmphp_init_devno() takes a struct slot **, it could instead take a
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struct slot *.
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* The return value of pci_hp_register() is not checked.
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* iounmap(io_mem) is called in the error path of ebda_rsrc_controller()
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and once more in the error path of its caller ibmphp_access_ebda().
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* The various slot data structures are difficult to follow and need to be
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simplified. A lot of functions are too large and too complex, they need
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to be broken up into smaller, manageable pieces. Negative examples are
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ebda_rsrc_controller() and configure_bridge().
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* A large portion of ibmphp_res.c and ibmphp_pci.c concerns resource
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management. Doesn't this duplicate functionality in the core?
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sgi_hotplug:
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* Several functions access the pci_slot member in struct hotplug_slot even
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though pci_hotplug.h declares it private. See sn_hp_destroy() for an
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example. Either the pci_slot member should no longer be declared private
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or sgi_hotplug should store a pointer to it in struct slot. Probably the
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former.
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shpchp:
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* There is only a single implementation of struct hpc_ops. Can the struct be
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removed and its functions invoked directly? This has already been done in
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pciehp with commit 82a9e79ef132 ("PCI: pciehp: remove hpc_ops"). Clarify
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if there was a specific reason not to apply the same change to shpchp.
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* The ->get_mode1_ECC_cap callback in shpchp_hpc_ops is never invoked.
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Why was it introduced? Can it be removed?
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* The hardirq handler shpc_isr() queues events on a workqueue. It can be
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simplified by converting it to threaded IRQ handling. Use pciehp as a
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template.
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