diff options
| author | Vishal Verma <vishal.l.verma@intel.com> | 2022-04-13 01:36:16 -0600 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-04-28 14:01:54 -0700 |
| commit | cc10eee95204579fcd66fd5965073fdcbf629676 (patch) | |
| tree | 410c5cbdf19f45d8582535acebafc90ba433d1db /drivers/acpi | |
| parent | 35e01667c84b1e16060020c3a13099447e61c822 (diff) | |
| download | linux-cc10eee95204579fcd66fd5965073fdcbf629676.tar.bz2 | |
PCI/ACPI: add a helper for retrieving _OSC Control DWORDs
During _OSC negotiation, when the 'Control' DWORD is needed from the
result buffer after running _OSC, a couple of places performed manual
pointer arithmetic to offset into the right spot in the raw buffer.
Add a acpi_osc_ctx_get_pci_control() helper to use the #define'd
DWORD offsets to fetch the DWORDs needed from @acpi_osc_context, and
replace the above instances of the open-coded arithmetic.
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Suggested-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed by: Adam Manzanares <a.manzanares@samsung.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/20220413073618.291335-2-vishal.l.verma@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/bus.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/pci_root.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 3e58b613a2c4..7658acbbb2bd 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -425,7 +425,7 @@ static void acpi_bus_osc_negotiate_usb_control(void) } osc_sb_native_usb4_control = - control & ((u32 *)context.ret.pointer)[OSC_CONTROL_DWORD]; + control & acpi_osc_ctx_get_pci_control(&context); acpi_bus_decode_usb_osc("USB4 _OSC: OS supports", control); acpi_bus_decode_usb_osc("USB4 _OSC: OS controls", diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 6f9e75d14808..57be89cb3966 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -183,7 +183,7 @@ static acpi_status acpi_pci_run_osc(acpi_handle handle, status = acpi_run_osc(handle, &context); if (ACPI_SUCCESS(status)) { - *retval = *((u32 *)(context.ret.pointer + 8)); + *retval = acpi_osc_ctx_get_pci_control(&context); kfree(context.ret.pointer); } return status; |