On Fri, 2010-10-08 at 17:51 +0200, Tomas Henzl wrote:
> On 09/23/2010 04:36 AM, bo yang wrote:
> > This patch is too big. I am using attachment to submit. Please
> > use attached file to apply. Also let me know if it can't be accepted.
> >
> > To add the Online controller reset support, driver need to do:
> > a). reset the controller chips -- Xscale and Gen2 which will change
> > the function calls and add the reset function related to this two
> > chips.
> > b). during the reset, driver will store the pending cmds which not
> > returned by FW to driver's pending queue. Driver will re-issue those
> > pending cmds again to FW after the OCR finished.
> > c). In driver's timeout routine, driver will report to OS as reset.
> > Also driver's queue routine will block the cmds until the OCR
> > finished.
> > d). in Driver's ISR routine, if driver get the FW state as state
> > change, FW in Failure status and FW support online controller
> > reset (OCR), driver will start to do the controller reset.
> > e). In driver's IOCTL routine, the application cmds will wait for the
> > OCR to finish, then issue the cmds to FW.
> >
> > Signed-off-by Bo Yang<bo.yang@xxxxxxx>
> >
> > ---
> > drivers/scsi/megaraid/megaraid_sas.c | 756 ++++++++++++++++++++++++++++++++---
> > drivers/scsi/megaraid/megaraid_sas.h | 88 +++-
> > 2 files changed, 787 insertions(+), 57 deletions(-)
> Hi Bo,
> in the workqueue function you sleep for 30s,
> it's scheduled here - schedule_work(&instance->work_init);
>
> +process_fw_state_change_wq(struct work_struct *work)
> +{
> ...
> + /*waitting for about 20 second before start the second init*/
> + for (wait = 0; wait < 30; wait++) {
> + msleep(1000);
> + }
this lot should be ssleep(20) if you want a 20 sec sleep.
>
> - this is not a good practice to sleep for a so long time I think
> - you should use in your exit function some synchronization
> for example 'cancel_work_sync', without that if someone rmmods your
> module, it could then lead to a memory corruption
Actually flush_scheduled_work() should be fine ... it will force the
module removal to wait for completion ... cancellation can be error
prone, so just forcing the wait sounds easier.
James
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
