2.6.38-stable review patch. If anyone has any objections, please let us know.
------------------ From: Tejun Heo <[email protected]> commit 1c27030bd21e7e2c68ef5be9f28c63778cf4b27f upstream. Convert gdrom and viocd from ->media_changed() to ->check_events(). It's unclear how the conditions are cleared and it's possible that it may generate spurious events when polled. Signed-off-by: Tejun Heo <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Kay Sievers <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/cdrom/gdrom.c | 16 ++++++++++------ drivers/cdrom/viocd.c | 17 ++++++++++------- 2 files changed, 20 insertions(+), 13 deletions(-) --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -395,10 +395,12 @@ static int gdrom_drivestatus(struct cdro return CDS_NO_INFO; } -static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore) +static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info, + unsigned int clearing, int ignore) { /* check the sense key */ - return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60; + return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ? + DISK_EVENT_MEDIA_CHANGE : 0; } /* reset the G1 bus */ @@ -483,7 +485,7 @@ static struct cdrom_device_ops gdrom_ops .open = gdrom_open, .release = gdrom_release, .drive_status = gdrom_drivestatus, - .media_changed = gdrom_mediachanged, + .check_events = gdrom_check_events, .get_last_session = gdrom_get_last_session, .reset = gdrom_hardreset, .audio_ioctl = gdrom_audio_ioctl, @@ -509,9 +511,10 @@ static int gdrom_bdops_release(struct ge return 0; } -static int gdrom_bdops_mediachanged(struct gendisk *disk) +static unsigned int gdrom_bdops_check_events(struct gendisk *disk, + unsigned int clearing) { - return cdrom_media_changed(gd.cd_info); + return cdrom_check_events(gd.cd_info, clearing); } static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode, @@ -530,7 +533,7 @@ static const struct block_device_operati .owner = THIS_MODULE, .open = gdrom_bdops_open, .release = gdrom_bdops_release, - .media_changed = gdrom_bdops_mediachanged, + .check_events = gdrom_bdops_check_events, .ioctl = gdrom_bdops_ioctl, }; @@ -800,6 +803,7 @@ static int __devinit probe_gdrom(struct goto probe_fail_cdrom_register; } gd.disk->fops = &gdrom_bdops; + gd.disk->events = DISK_EVENT_MEDIA_CHANGE; /* latch on to the interrupt */ err = gdrom_set_interrupt_handlers(); if (err) --- a/drivers/cdrom/viocd.c +++ b/drivers/cdrom/viocd.c @@ -186,10 +186,11 @@ static int viocd_blk_ioctl(struct block_ return ret; } -static int viocd_blk_media_changed(struct gendisk *disk) +static unsigned int viocd_blk_check_events(struct gendisk *disk, + unsigned int clearing) { struct disk_info *di = disk->private_data; - return cdrom_media_changed(&di->viocd_info); + return cdrom_check_events(&di->viocd_info, clearing); } static const struct block_device_operations viocd_fops = { @@ -197,7 +198,7 @@ static const struct block_device_operati .open = viocd_blk_open, .release = viocd_blk_release, .ioctl = viocd_blk_ioctl, - .media_changed = viocd_blk_media_changed, + .check_events = viocd_blk_check_events, }; static int viocd_open(struct cdrom_device_info *cdi, int purpose) @@ -320,7 +321,8 @@ static void do_viocd_request(struct requ } } -static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr) +static unsigned int viocd_check_events(struct cdrom_device_info *cdi, + unsigned int clearing, int disc_nr) { struct viocd_waitevent we; HvLpEvent_Rc hvrc; @@ -340,7 +342,7 @@ static int viocd_media_changed(struct cd if (hvrc != 0) { pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n", (int)hvrc); - return -EIO; + return 0; } wait_for_completion(&we.com); @@ -354,7 +356,7 @@ static int viocd_media_changed(struct cd return 0; } - return we.changed; + return we.changed ? DISK_EVENT_MEDIA_CHANGE : 0; } static int viocd_lock_door(struct cdrom_device_info *cdi, int locking) @@ -550,7 +552,7 @@ static int viocd_audio_ioctl(struct cdro static struct cdrom_device_ops viocd_dops = { .open = viocd_open, .release = viocd_release, - .media_changed = viocd_media_changed, + .check_events = viocd_check_events, .lock_door = viocd_lock_door, .generic_packet = viocd_packet, .audio_ioctl = viocd_audio_ioctl, @@ -624,6 +626,7 @@ static int viocd_probe(struct vio_dev *v gendisk->queue = q; gendisk->fops = &viocd_fops; gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE; + gendisk->events = DISK_EVENT_MEDIA_CHANGE; set_capacity(gendisk, 0); gendisk->private_data = d; d->viocd_disk = gendisk; _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
