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DAC960: remove sleep_on usage 

sleep_on and its variants are going away. The use of sleep_on() in
DAC960_V2_ExecuteUserCommand seems to be bogus because the command
by the time we get there, the command has completed already and
we just enter the timeout. Based on this interpretation, I concluded
that we can replace it with a simple msleep(1000) and rearrange the
code around it slightly.

The interruptible_sleep_on_timeout in DAC960_gam_ioctl seems equivalent
to the race-free version using wait_event_interruptible_timeout.
I left the driver to return -EINTR rather than -ERESTARTSYS to preserve
the timeout behavior.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Arnd Bergmann 2014-02-26 12:01:43 +01:00 committed by Jens Axboe
parent c94efe36e2
commit 9c552e1ddd
1 changed files with 16 additions and 18 deletions
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34
drivers/block/DAC960.c
View File

@ -6411,12 +6411,12 @@ static bool DAC960_V2_ExecuteUserCommand(DAC960_Controller_T *Controller,
.ScatterGatherSegments[0]
.SegmentByteCount =
CommandMailbox->ControllerInfo.DataTransferSize;
DAC960_ExecuteCommand(Command);
while (Controller->V2.NewControllerInformation->PhysicalScanActive)
{
DAC960_ExecuteCommand(Command);
sleep_on_timeout(&Controller->CommandWaitQueue, HZ);
}
while (1) {
DAC960_ExecuteCommand(Command);
if (!Controller->V2.NewControllerInformation->PhysicalScanActive)
break;
msleep(1000);
}
DAC960_UserCritical("Discovery Completed\n", Controller);
}
}
@ -7035,18 +7035,16 @@ static long DAC960_gam_ioctl(struct file *file, unsigned int Request,
ErrorCode = -EFAULT;
break;
}
while (Controller->V2.HealthStatusBuffer->StatusChangeCounter
== HealthStatusBuffer.StatusChangeCounter &&
Controller->V2.HealthStatusBuffer->NextEventSequenceNumber
== HealthStatusBuffer.NextEventSequenceNumber)
{
interruptible_sleep_on_timeout(&Controller->HealthStatusWaitQueue,
DAC960_MonitoringTimerInterval);
if (signal_pending(current)) {
ErrorCode = -EINTR;
break;
}
}
ErrorCode = wait_event_interruptible_timeout(Controller->HealthStatusWaitQueue,
!(Controller->V2.HealthStatusBuffer->StatusChangeCounter
== HealthStatusBuffer.StatusChangeCounter &&
Controller->V2.HealthStatusBuffer->NextEventSequenceNumber
== HealthStatusBuffer.NextEventSequenceNumber),
DAC960_MonitoringTimerInterval);
if (ErrorCode == -ERESTARTSYS) {
ErrorCode = -EINTR;
break;
}
if (copy_to_user(GetHealthStatus.HealthStatusBuffer,
Controller->V2.HealthStatusBuffer,
sizeof(DAC960_V2_HealthStatusBuffer_T)))