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[PATCH] s390: dasd open counter 

The open_count is increased for every opener, that includes the blkdev_get in
dasd_scan_partitions.  This tampers the open_count in BIODASDINFO.  Hide the
internal open from user-space.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Horst Hummel 2006-02-01 03:06:36 -08:00 committed by Linus Torvalds
parent 600b5d163d
commit 57467195d1
1 changed files with 8 additions and 1 deletions
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9
drivers/s390/block/dasd_ioctl.c
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@ -421,8 +421,15 @@ dasd_ioctl_information(struct block_device *bdev, int no, long args)
dasd_info->cu_model = cdev->id.cu_model;
dasd_info->dev_type = cdev->id.dev_type;
dasd_info->dev_model = cdev->id.dev_model;
dasd_info->open_count = atomic_read(&device->open_count);
dasd_info->status = device->state;
/*
* The open_count is increased for every opener, that includes
* the blkdev_get in dasd_scan_partitions.
* This must be hidden from user-space.
*/
dasd_info->open_count = atomic_read(&device->open_count);
if (!device->bdev)
dasd_info->open_count++;
/*
* check if device is really formatted