Hello, This patchset aims to solve the problem that currently all users of the opal-async calls must use wait_event(), this may be undesirable when there is a userspace process behind the request for the opal call, if OPAL takes too long to complete the call then hung task warnings will appear.
In order to solve the problem callers should use wait_event_interruptible(), due to the interruptible nature of this call the opal-async infrastructure needs to track extra state associated with each async token, this is prepared for in patch 2/5. Patch 3/5 attempts to provide a solution to the problem that the powernv_flash MTD driver can use in patch 5/5. Hello MTD folk, traditionally Michael Ellerman takes powernv_flash driver patches through the powerpc tree, as always your feedback is very welcome. Thanks, Cyril Cyril Bur (5): powerpc/opal: Make __opal_async_{get,release}_token() static powerpc/opal: Rework the opal-async interface powerpc/opal: Add opal_async_wait_response_interruptible() to opal-async powerpc/powernv: Add OPAL_BUSY to opal_error_code() mtd: powernv_flash: Use opal_async_wait_response_interruptible() arch/powerpc/include/asm/opal.h | 3 +- arch/powerpc/platforms/powernv/opal-async.c | 190 ++++++++++++++++++++-------- arch/powerpc/platforms/powernv/opal.c | 1 + drivers/mtd/devices/powernv_flash.c | 18 ++- 4 files changed, 151 insertions(+), 61 deletions(-) -- 2.13.2