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| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2011-08-09 08:18:01 -0500 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-08-26 12:52:39 -0700 |
| commit | 01350d05539d1c95ef3568d062d864ab76ae7670 (patch) | |
| tree | 0c1f3cc68e87cecb1393f4ed09fb78edc593995f /drivers/scsi/hpsa.c | |
| parent | 0b0e1d6cbcc8627970e0399df8f06edd690ec7d9 (diff) | |
| download | linux-3.10-01350d05539d1c95ef3568d062d864ab76ae7670.tar.gz linux-3.10-01350d05539d1c95ef3568d062d864ab76ae7670.tar.bz2 linux-3.10-01350d05539d1c95ef3568d062d864ab76ae7670.zip | |
[SCSI] hpsa: fix physical device lun and target numbering problem
If a physical device exposed to the OS by hpsa
is replaced (e.g. one hot plug tape drive is replaced
by another, or a tape drive is placed into "OBDR" mode
in which it acts like a CD-ROM device) and a rescan is
initiated, the replaced device will be added to the
SCSI midlayer with target and lun numbers set to -1.
After that, a panic is likely to ensue. When a physical
device is replaced, the lun and target number should be
preserved.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/hpsa.c')
| -rw-r--r-- | drivers/scsi/hpsa.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 1f32f0610bc..b200b736b00 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -676,6 +676,16 @@ static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno, BUG_ON(entry < 0 || entry >= HPSA_MAX_SCSI_DEVS_PER_HBA); removed[*nremoved] = h->dev[entry]; (*nremoved)++; + + /* + * New physical devices won't have target/lun assigned yet + * so we need to preserve the values in the slot we are replacing. + */ + if (new_entry->target == -1) { + new_entry->target = h->dev[entry]->target; + new_entry->lun = h->dev[entry]->lun; + } + h->dev[entry] = new_entry; added[*nadded] = new_entry; (*nadded)++; |