davidlt/kernel-ark
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
ab232ba570
kernel-ark/drivers/pnp
History
Rafael J. Wysocki 0f1b414d19 ACPI / PNP: Avoid conflicting resource reservations 
Commit b9a5e5e18f "ACPI / init: Fix the ordering of
acpi_reserve_resources()" overlooked the fact that the memory
and/or I/O regions reserved by acpi_reserve_resources() may
conflict with those reserved by the PNP "system" driver.

If that conflict actually takes place, it causes the reservations
made by the "system" driver to fail while before commit b9a5e5e18f
all reservations made by it and by acpi_reserve_resources() would be
successful.  In turn, that allows the resources that haven't been
reserved by the "system" driver to be used by others (e.g. PCI) which
sometimes leads to functional problems (up to and including boot
failures).

To fix that issue, introduce a common resource reservation routine,
acpi_reserve_region(), to be used by both acpi_reserve_resources()
and the "system" driver, that will track all resources reserved by
it and avoid making conflicting requests.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831
Link: http://marc.info/?t=143389402600001&r=1&w=2
Fixes: b9a5e5e18f "ACPI / init: Fix the ordering of acpi_reserve_resources()"
Reported-by: Roland Dreier <roland@purestorage.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-06-18 18:32:02 +02:00
..
isapnp
pnpacpi PNP / ACPI: Use ACPI_COMPANION_SET() during initialization 2015-03-16 15:19:07 +01:00
pnpbios pnpbios: bail out on strange errors 2015-01-25 09:17:59 -08:00
base.h PNP: Convert pnp_lock into a mutex 2015-03-18 22:39:55 +01:00
card.c PNP: Convert pnp_lock into a mutex 2015-03-18 22:39:55 +01:00
core.c PNP: Avoid leaving unregistered device objects in lists 2015-03-18 22:40:04 +01:00
driver.c PNP: Convert pnp_lock into a mutex 2015-03-18 22:39:55 +01:00
interface.c PNP: replace strnicmp with strncasecmp 2014-10-14 02:18:25 +02:00
Kconfig
Makefile
manager.c
quirks.c PNP: Don't check for overlaps with unassigned PCI BARs 2015-03-12 12:30:00 -05:00
resource.c PNP: Switch from __check_region() to __request_region() 2015-01-22 01:14:50 +01:00
support.c
system.c ACPI / PNP: Avoid conflicting resource reservations 2015-06-18 18:32:02 +02:00