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| author | Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net> | 2008-12-18 14:55:11 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-12-19 08:14:07 +0100 |
| commit | d8a0be6ab7ba1ffa43e7ea0dcdde3e8b68d4f762 (patch) | |
| tree | b0e66e1dddaea05d9bc0b85461ffd058229a672f /drivers/block | |
| parent | Linux 2.6.28-rc9 (diff) | |
| download | linux-d8a0be6ab7ba1ffa43e7ea0dcdde3e8b68d4f762.tar.xz linux-d8a0be6ab7ba1ffa43e7ea0dcdde3e8b68d4f762.zip | |
cciss: fix problem that deleting multiple logical drives could cause a panic
Fix problem that deleting multiple logical drives could cause a panic.
It fixes a panic which can be easily reproduced in the following way: Just
create several "arrays," each with multiple logical drives via hpacucli,
then delete the first array, and it will blow up in deregister_disk(), in
the call to get_host() when it tries to dig the hba pointer out of a NULL
queue pointer.
The problem has been present since my code to make rebuild_lun_table
behave better went in.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 9364dc554257..9f7c543cc04b 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -1693,6 +1693,11 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time) for (i = 0; i <= h->highest_lun; i++) { int j; drv_found = 0; + + /* skip holes in the array from already deleted drives */ + if (h->drv[i].raid_level == -1) + continue; + for (j = 0; j < num_luns; j++) { memcpy(&lunid, &ld_buff->LUN[j][0], 4); lunid = le32_to_cpu(lunid); |