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dasd: fix sysfs cleanup in dasd_generic_remove 

When the DASD devices are detached from the driver, then the
dasd_generic_remove function is called. One of the things this
function should do is to remove the DASD specific sysfs attributes,
but this is not done in all cases. This is likely to cause an oops
when at a later point sysfs stumbles over the stale pointers. In
particular this happens when when the modules are unloaded and loaded
again.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Weinhuber 2013-02-04 13:10:35 +01:00 committed by Martin Schwidefsky
parent 53923354d6
commit be4904e503
1 changed files with 4 additions and 1 deletions
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5
drivers/s390/block/dasd.c
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@ -3042,12 +3042,15 @@ void dasd_generic_remove(struct ccw_device *cdev)
cdev->handler = NULL;
device = dasd_device_from_cdev(cdev);
if (IS_ERR(device))
if (IS_ERR(device)) {
dasd_remove_sysfs_files(cdev);
return;
}
if (test_and_set_bit(DASD_FLAG_OFFLINE, &device->flags) &&
!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
/* Already doing offline processing */
dasd_put_device(device);
dasd_remove_sysfs_files(cdev);
return;
}
/*