linux/drivers/platform
Hans de Goede aec7d25b49 platform/x86: p2sb: On Goldmont only cache P2SB and SPI devfn BAR
On Goldmont p2sb_bar() only ever gets called for 2 devices, the actual P2SB
devfn 13,0 and the SPI controller which is part of the P2SB, devfn 13,2.

But the current p2sb code tries to cache BAR0 info for all of
devfn 13,0 to 13,7 . This involves calling pci_scan_single_device()
for device 13 functions 0-7 and the hw does not seem to like
pci_scan_single_device() getting called for some of the other hidden
devices. E.g. on an ASUS VivoBook D540NV-GQ065T this leads to continuous
ACPI errors leading to high CPU usage.

Fix this by only caching BAR0 info and thus only calling
pci_scan_single_device() for the P2SB and the SPI controller.

Fixes: 5913320eb0 ("platform/x86: p2sb: Allow p2sb_bar() calls during PCI device probe")
Reported-by: Danil Rybakov <danilrybakov249@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218531
Tested-by: Danil Rybakov <danilrybakov249@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240304134356.305375-2-hdegoede@redhat.com
2024-03-05 10:16:27 +01:00
..
chrome TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
goldfish platform/goldfish: goldfish_pipe: Convert to platform remove callback returning void 2023-11-28 19:03:24 +00:00
loongarch platform/loongarch: laptop: Fix possible UAF and simplify generic_acpi_laptop_init() 2022-10-29 16:29:31 +08:00
mellanox platform/mellanox: mlxbf-pmc: Fix offset calculation for crspace events 2024-01-22 12:22:27 +01:00
mips mips: rs870e: stop exporting local functions 2023-12-10 17:21:39 -08:00
olpc platform/olpc: olpc-xo175-ec: Use SPI device ID data to bind device 2023-03-20 14:43:35 +01:00
surface TTY/Serial changes for 6.8-rc1 2024-01-18 11:37:24 -08:00
x86 platform/x86: p2sb: On Goldmont only cache P2SB and SPI devfn BAR 2024-03-05 10:16:27 +01:00
Kconfig platform/mips: Adjust Kconfig to keep consistency 2022-12-08 11:51:52 +01:00
Makefile LoongArch: Add ACPI-based generic laptop driver 2022-10-12 16:36:20 +08:00