tree b795b6a05877a977ffcb93b084f4e955cc003fe2
parent 3efaebb3bbc1a5d702ed0a943b91cd14f78d0bab
author Mark Rutland <mark.rutland@arm.com> 1491899989 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1521706671 +0100

drivers/perf: arm_pmu: handle no platform_device


[ Upstream commit 7654137071fa706e5c91f4f27bc2a5cd7e435a9b ]

In armpmu_dispatch_irq() we look at arm_pmu::plat_device to acquire
platdata, so that we can defer to platform-specific IRQ handling,
required on some 32-bit parts. With the advent of ACPI we won't always
have a platform_device, and so we must avoid trying to dereference
fields from it.

This patch fixes up armpmu_dispatch_irq() to avoid doing so, introducing
a new armpmu_get_platdata() helper.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>