paride: Convert to bdops->check_events()

Convert paride drivers from ->media_changed() to ->check_events().

pcd and pd buffer and clear events after reporting; however, pf
unconditionally reports MEDIA_CHANGE and will generate spurious events
when polled.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Tim Waugh <tim@cyberelk.net>

3 files changed, 21 insertions, 14 deletions

diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 62cec6afd7ad..2f2ccf686251 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -172,7 +172,8 @@ module_param_array(drive3, int, NULL, 0);
 static int pcd_open(struct cdrom_device_info *cdi, int purpose);
 static void pcd_release(struct cdrom_device_info *cdi);
 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
-static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr);
+static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
+                                     unsigned int clearing, int slot_nr);
 static int pcd_tray_move(struct cdrom_device_info *cdi, int position);
 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock);
 static int pcd_drive_reset(struct cdrom_device_info *cdi);
@@ -257,10 +258,11 @@ static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
         return ret;
 }
 
-static int pcd_block_media_changed(struct gendisk *disk)
+static unsigned int pcd_block_check_events(struct gendisk *disk,
+                                           unsigned int clearing)
 {
         struct pcd_unit *cd = disk->private_data;
-        return cdrom_media_changed(&cd->info);
+        return cdrom_check_events(&cd->info, clearing);
 }
 
 static const struct block_device_operations pcd_bdops = {
@@ -268,14 +270,14 @@ static const struct block_device_operations pcd_bdops = {
         .open           = pcd_block_open,
         .release        = pcd_block_release,
         .ioctl          = pcd_block_ioctl,
-        .media_changed  = pcd_block_media_changed,
+        .check_events   = pcd_block_check_events,
 };
 
 static struct cdrom_device_ops pcd_dops = {
         .open           = pcd_open,
         .release        = pcd_release,
         .drive_status   = pcd_drive_status,
-        .media_changed  = pcd_media_changed,
+        .check_events   = pcd_check_events,
         .tray_move      = pcd_tray_move,
         .lock_door      = pcd_lock_door,
         .get_mcn        = pcd_get_mcn,
@@ -318,6 +320,7 @@ static void pcd_init_units(void)
                 disk->first_minor = unit;
                 strcpy(disk->disk_name, cd->name);      /* umm... */
                 disk->fops = &pcd_bdops;
+                disk->events = DISK_EVENT_MEDIA_CHANGE;
         }
 }
 
@@ -502,13 +505,14 @@ static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc)
 
 #define DBMSG(msg)      ((verbose>1)?(msg):NULL)
 
-static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr)
+static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
+                                     unsigned int clearing, int slot_nr)
 {
         struct pcd_unit *cd = cdi->handle;
         int res = cd->changed;
         if (res)
                 cd->changed = 0;
-        return res;
+        return res ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock)
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index c0ee1558b9bb..21dfdb776869 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -794,7 +794,7 @@ static int pd_release(struct gendisk *p, fmode_t mode)
         return 0;
 }
 
-static int pd_check_media(struct gendisk *p)
+static unsigned int pd_check_events(struct gendisk *p, unsigned int clearing)
 {
         struct pd_unit *disk = p->private_data;
         int r;
@@ -803,7 +803,7 @@ static int pd_check_media(struct gendisk *p)
         pd_special_command(disk, pd_media_check);
         r = disk->changed;
         disk->changed = 0;
-        return r;
+        return r ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
 static int pd_revalidate(struct gendisk *p)
@@ -822,7 +822,7 @@ static const struct block_device_operations pd_fops = {
         .release        = pd_release,
         .ioctl          = pd_ioctl,
         .getgeo         = pd_getgeo,
-        .media_changed  = pd_check_media,
+        .check_events   = pd_check_events,
         .revalidate_disk= pd_revalidate
 };
 
@@ -837,6 +837,7 @@ static void pd_probe_drive(struct pd_unit *disk)
         p->fops = &pd_fops;
         p->major = major;
         p->first_minor = (disk - pd) << PD_BITS;
+        p->events = DISK_EVENT_MEDIA_CHANGE;
         disk->gd = p;
         p->private_data = disk;
         p->queue = pd_queue;
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index 635f25dd9e10..7adeb1edbf43 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -243,7 +243,8 @@ static struct pf_unit units[PF_UNITS];
 static int pf_identify(struct pf_unit *pf);
 static void pf_lock(struct pf_unit *pf, int func);
 static void pf_eject(struct pf_unit *pf);
-static int pf_check_media(struct gendisk *disk);
+static unsigned int pf_check_events(struct gendisk *disk,
+                                    unsigned int clearing);
 
 static char pf_scratch[512];    /* scratch block buffer */
 
@@ -270,7 +271,7 @@ static const struct block_device_operations pf_fops = {
         .release        = pf_release,
         .ioctl          = pf_ioctl,
         .getgeo         = pf_getgeo,
-        .media_changed  = pf_check_media,
+        .check_events   = pf_check_events,
 };
 
 static void __init pf_init_units(void)
@@ -293,6 +294,7 @@ static void __init pf_init_units(void)
                 disk->first_minor = unit;
                 strcpy(disk->disk_name, pf->name);
                 disk->fops = &pf_fops;
+                disk->events = DISK_EVENT_MEDIA_CHANGE;
                 if (!(*drives[unit])[D_PRT])
                         pf_drive_count++;
         }
@@ -377,9 +379,9 @@ static int pf_release(struct gendisk *disk, fmode_t mode)
 
 }
 
-static int pf_check_media(struct gendisk *disk)
+static unsigned int pf_check_events(struct gendisk *disk, unsigned int clearing)
 {
-        return 1;
+        return DISK_EVENT_MEDIA_CHANGE;
 }
 
 static inline int status_reg(struct pf_unit *pf)