ide: Convert to bdops->check_events()

Convert ->media_changed() to the new ->check_events() method.  The
conversion is mostly mechanical.  The only notable change is that
cdrom now doesn't generate any event if @slot_nr isn't CDSL_CURRENT.
It used to return -EINVAL which would be treated as media changed.  As
media changer isn't supported anyway, this doesn't make any
difference.

This makes ide emit the standard disk events and allows kernel event
polling.  Currently, only MEDIA_CHANGE event is implemented.  Adding
support for EJECT_REQUEST shouldn't be difficult; however, given that
ide driver is already deprecated, it probably is best to leave it
alone.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-ide@vger.kernel.org

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 0c73fe39a236bb6d6e05f37814c646098a57b715..a2e29099ee0c1b22339452e76c9150bac827ce7b 100644 (file)
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1177,7 +1177,7 @@ static struct cdrom_device_ops ide_cdrom_dops = {
        .open                   = ide_cdrom_open_real,
        .release                = ide_cdrom_release_real,
        .drive_status           = ide_cdrom_drive_status,
-       .media_changed          = ide_cdrom_check_media_change_real,
+       .check_events           = ide_cdrom_check_events_real,
        .tray_move              = ide_cdrom_tray_move,
        .lock_door              = ide_cdrom_lock_door,
        .select_speed           = ide_cdrom_select_speed,
@@ -1702,10 +1702,11 @@ static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
 }
 
 
-static int idecd_media_changed(struct gendisk *disk)
+static unsigned int idecd_check_events(struct gendisk *disk,
+                                      unsigned int clearing)
 {
        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
-       return cdrom_media_changed(&info->devinfo);
+       return cdrom_check_events(&info->devinfo, clearing);
 }
 
 static int idecd_revalidate_disk(struct gendisk *disk)
@@ -1723,7 +1724,7 @@ static const struct block_device_operations idecd_ops = {
        .open                   = idecd_open,
        .release                = idecd_release,
        .ioctl                  = idecd_ioctl,
-       .media_changed          = idecd_media_changed,
+       .check_events           = idecd_check_events,
        .revalidate_disk        = idecd_revalidate_disk
 };
 
@@ -1790,6 +1791,7 @@ static int ide_cd_probe(ide_drive_t *drive)
        ide_cd_read_toc(drive, &sense);
        g->fops = &idecd_ops;
        g->flags |= GENHD_FL_REMOVABLE;
+       g->events = DISK_EVENT_MEDIA_CHANGE;
        add_disk(g);
        return 0;
 

diff --git a/drivers/ide/ide-cd.h b/drivers/ide/ide-cd.h
index 93a3cf1b0f3f8c61b974b9b16a190502f5d4d038..1efc936f5b6672e268a38db439c63831fd59b71f 100644 (file)
--- a/drivers/ide/ide-cd.h
+++ b/drivers/ide/ide-cd.h
@@ -111,7 +111,8 @@ int cdrom_check_status(ide_drive_t *, struct request_sense *);
 int ide_cdrom_open_real(struct cdrom_device_info *, int);
 void ide_cdrom_release_real(struct cdrom_device_info *);
 int ide_cdrom_drive_status(struct cdrom_device_info *, int);
-int ide_cdrom_check_media_change_real(struct cdrom_device_info *, int);
+unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *,
+                                        unsigned int clearing, int slot_nr);
 int ide_cdrom_tray_move(struct cdrom_device_info *, int);
 int ide_cdrom_lock_door(struct cdrom_device_info *, int);
 int ide_cdrom_select_speed(struct cdrom_device_info *, int);

diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 766b3deeb23c75f51eb5618a90e891d2fb220d90..2a6bc50e8a41e8918da5ad8aca49686d68da318c 100644 (file)
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -79,8 +79,8 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
        return CDS_DRIVE_NOT_READY;
 }
 
-int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
-                                      int slot_nr)
+unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
+                                        unsigned int clearing, int slot_nr)
 {
        ide_drive_t *drive = cdi->handle;
        int retval;
@@ -89,9 +89,9 @@ int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
                (void) cdrom_check_status(drive, NULL);
                retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
                drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
-               return retval;
+               return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
        } else {
-               return -EINVAL;
+               return 0;
        }
 }
 

diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 35c4b43585e3418ebb7ad1b74c94550d5fbcfb86..c4ffd4888939a7f4e67ee7f1191a08d485c85e44 100644 (file)
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -285,11 +285,12 @@ static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
        return 0;
 }
 
-static int ide_gd_media_changed(struct gendisk *disk)
+static unsigned int ide_gd_check_events(struct gendisk *disk,
+                                       unsigned int clearing)
 {
        struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
        ide_drive_t *drive = idkp->drive;
-       int ret;
+       bool ret;
 
        /* do not scan partitions twice if this is a removable device */
        if (drive->dev_flags & IDE_DFLAG_ATTACH) {
@@ -297,10 +298,10 @@ static int ide_gd_media_changed(struct gendisk *disk)
                return 0;
        }
 
-       ret = !!(drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED);
+       ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
        drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
 
-       return ret;
+       return ret ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
 static void ide_gd_unlock_native_capacity(struct gendisk *disk)
@@ -318,7 +319,7 @@ static int ide_gd_revalidate_disk(struct gendisk *disk)
        struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
        ide_drive_t *drive = idkp->drive;
 
-       if (ide_gd_media_changed(disk))
+       if (ide_gd_check_events(disk, 0))
                drive->disk_ops->get_capacity(drive);
 
        set_capacity(disk, ide_gd_capacity(drive));
@@ -340,7 +341,7 @@ static const struct block_device_operations ide_gd_ops = {
        .release                = ide_gd_release,
        .ioctl                  = ide_gd_ioctl,
        .getgeo                 = ide_gd_getgeo,
-       .media_changed          = ide_gd_media_changed,
+       .check_events           = ide_gd_check_events,
        .unlock_native_capacity = ide_gd_unlock_native_capacity,
        .revalidate_disk        = ide_gd_revalidate_disk
 };
@@ -412,6 +413,7 @@ static int ide_gd_probe(ide_drive_t *drive)
        if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
                g->flags = GENHD_FL_REMOVABLE;
        g->fops = &ide_gd_ops;
+       g->events = DISK_EVENT_MEDIA_CHANGE;
        add_disk(g);
        return 0;