Hi Betty, On Tue, Jul 24, 2012 at 12:55:06PM -0600, Betty Dall wrote: > > > > diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c > > > > index 2f159aa..78c4226 100644 > > > > --- a/drivers/scsi/sr.c > > > > +++ b/drivers/scsi/sr.c > > > > @@ -869,6 +869,7 @@ static int sr_probe(struct device *dev) > > > > dev_set_drvdata(dev, cd); > > > > disk->flags |= GENHD_FL_REMOVABLE; > > > > add_disk(disk); > > > > + disk_events_set_poll_msecs(disk, 2000); > > > > > > Could you check that disk event's poll_msecs is the default (-1) before > > > setting it to 2s? I am thinking of a case when the probe happens after > > > the call to disk_events_poll_msecs_store() and this code would overwrite > > > the user specified value. > > > > The block device sr0 is created by this driver in this probe function, > > so the user should not be able to set the poll interval before probe, > > right? > > The add_disk() call happens immediately before the new > disk_events_set_poll_msecs() call. add_disk() is what eventually creates > the sysfs files
Right, and it's disk_add_events in add_disk that adds these sysfs files. > and calls your new disk_events_set_poll_msecs(). No... there is no call to disk_events_set_poll_msecs in add_disk, when the events for the disk is created by disk_alloc_events, the poll_msecs of the event is initialized to the default value -1. And then disk_add_events will create the sysfs files and add_disk will return, and I'll change the default value of -1 to 2000 with the new function I've made. > It makes more sense to me to have the new call to > disk_events_set_poll_msecs(disk, 2000) before the call to add_disk(). This is too early, since the events of the disk is not allocated yet. I hope I've explained this clearly, if you see a problem, please let me know, thanks. -Aaron -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
