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cciss: Fix excessive gendisk freeing bug on driver unload. 

Fix bug that free_hba was calling put_disk for all gendisk[]
pointers -- all 1024 of them -- regardless of whether the were
used or not (NULL).  This bug could cause rmmod to oops if logical
drives had been deleted during the driver's lifetime.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Stephen M. Cameron 2009-09-17 13:47:50 -05:00 committed by Jens Axboe
parent 2d11d9931f
commit 2c935593ac
1 changed files with 8 additions and 7 deletions
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15
drivers/block/cciss.c
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@ -3893,15 +3893,16 @@ Enomem:
return -1;
}
static void free_hba(int i)
static void free_hba(int n)
{
ctlr_info_t *p = hba[i];
int n;
ctlr_info_t *h = hba[n];
int i;
hba[i] = NULL;
for (n = 0; n < CISS_MAX_LUN; n++)
put_disk(p->gendisk[n]);
kfree(p);
hba[n] = NULL;
for (i = 0; i < h->highest_lun + 1; i++)
if (h->gendisk[i] != NULL)
put_disk(h->gendisk[i]);
kfree(h);
}
/* Send a message CDB to the firmware. */