Commit a38ae37f authored by kashyap.desai@lsi.com's avatar kashyap.desai@lsi.com Committed by James Bottomley

[SCSI] mptfusion: Avoid out of order Event processing due to cpu migration

Driver will now schedule MPI event using "delay_work_queue_on" to
specify same CPU to be used to schedule work.  Earlier it used
"delay_work_queue" which can cause migration of work due to kernel'
timer migration feature.
Signed-off-by: default avatarKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent e62cca19
......@@ -290,10 +290,11 @@ mptsas_add_fw_event(MPT_ADAPTER *ioc, struct fw_event_work *fw_event,
spin_lock_irqsave(&ioc->fw_event_lock, flags);
list_add_tail(&fw_event->list, &ioc->fw_event_list);
INIT_DELAYED_WORK(&fw_event->work, mptsas_firmware_event_work);
devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT "%s: add (fw_event=0x%p)\n",
ioc->name, __func__, fw_event));
queue_delayed_work(ioc->fw_event_q, &fw_event->work,
delay);
devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT "%s: add (fw_event=0x%p)"
"on cpuid %d\n", ioc->name, __func__,
fw_event, smp_processor_id()));
queue_delayed_work_on(smp_processor_id(), ioc->fw_event_q,
&fw_event->work, delay);
spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}
......@@ -305,10 +306,11 @@ mptsas_requeue_fw_event(MPT_ADAPTER *ioc, struct fw_event_work *fw_event,
unsigned long flags;
spin_lock_irqsave(&ioc->fw_event_lock, flags);
devtprintk(ioc, printk(MYIOC_s_DEBUG_FMT "%s: reschedule task "
"(fw_event=0x%p)\n", ioc->name, __func__, fw_event));
"(fw_event=0x%p)on cpuid %d\n", ioc->name, __func__,
fw_event, smp_processor_id()));
fw_event->retries++;
queue_delayed_work(ioc->fw_event_q, &fw_event->work,
msecs_to_jiffies(delay));
queue_delayed_work_on(smp_processor_id(), ioc->fw_event_q,
&fw_event->work, msecs_to_jiffies(delay));
spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}
......
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