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ide: fix refcounting in device drivers

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During host driver module removal del_gendisk() results in a final
put on drive->gendev and freeing the drive by drive_release_dev().

Convert device drivers from using struct kref to use struct device
so device driver's object holds reference on ->gendev and prevents
drive from prematurely going away.

Also fix ->remove methods to not erroneously drop reference on a
host driver by using only put_device() instead of ide*_put().

Reported-by: Stanislaw Gruszka <stf_xl@wp.pl>
Tested-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-02-25 20:28:24 +01:00
parent d3dd7107f4
commit 8fed436841
6 changed files with 57 additions and 31 deletions
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2
include/linux/ide.h
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@ -663,7 +663,7 @@ typedef struct ide_drive_s ide_drive_t;
#define to_ide_device(dev) container_of(dev, ide_drive_t, gendev)
#define to_ide_drv(obj, cont_type) \
container_of(obj, struct cont_type, kref)
container_of(obj, struct cont_type, dev)
#define ide_drv_g(disk, cont_type) \
container_of((disk)->private_data, struct cont_type, driver)