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sr: implement sr_check_events()

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Replace sr_media_change() with sr_check_events().  It normally only
uses GET_EVENT_STATUS_NOTIFICATION to check both media change and
eject request.  If @clearing includes DISK_EVENT_MEDIA_CHANGE, it
issues TUR and compares whether media presence has changed.  The SCSI
specific media change uevent is kept for compatibility.

sr_media_change() was doing both media change check and revalidation.
The revalidation part is split into sr_block_revalidate_disk().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Tejun Heo
2010-12-16 17:52:17 +01:00
committed by Jens Axboe
parent 9f8a2c23c6
commit 93aae17af1
3 changed files with 100 additions and 54 deletions
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include/scsi/scsi.h
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@@ -104,6 +104,7 @@ struct scsi_cmnd;
#define UNMAP 0x42
#define READ_TOC 0x43
#define READ_HEADER 0x44
#define GET_EVENT_STATUS_NOTIFICATION 0x4a
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
#define XDWRITEREAD_10 0x53