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[PATCH] cciss: bug fix for crash when running hpacucli 

Fix a crash when running hpacucli with multiple logical volumes on a cciss
controller.  We were not properly initializing the disk->queue and causing
a fault.

Thanks to Hasso Tepper for reporting the problem.  Thanks to Steve Cameron
for root causing the problem.  Most of the patch just moves things around.
The fix is a one-liner.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Stephen Cameron <steve.cameron@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mike Miller 2006-04-10 15:38:07 -07:00 committed by Greg Kroah-Hartman
parent 75616cf985
commit ca1e0484d9
1 changed files with 49 additions and 47 deletions
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96
drivers/block/cciss.c
View File

@ -1180,6 +1180,53 @@ static int revalidate_allvol(ctlr_info_t *host)
return 0;
}
static inline void complete_buffers(struct bio *bio, int status)
{
while (bio) {
struct bio *xbh = bio->bi_next;
int nr_sectors = bio_sectors(bio);
bio->bi_next = NULL;
blk_finished_io(len);
bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
bio = xbh;
}
}
static void cciss_softirq_done(struct request *rq)
{
CommandList_struct *cmd = rq->completion_data;
ctlr_info_t *h = hba[cmd->ctlr];
unsigned long flags;
u64bit temp64;
int i, ddir;
if (cmd->Request.Type.Direction == XFER_READ)
ddir = PCI_DMA_FROMDEVICE;
else
ddir = PCI_DMA_TODEVICE;
/* command did not need to be retried */
/* unmap the DMA mapping for all the scatter gather elements */
for(i=0; i<cmd->Header.SGList; i++) {
temp64.val32.lower = cmd->SG[i].Addr.lower;
temp64.val32.upper = cmd->SG[i].Addr.upper;
pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
}
complete_buffers(rq->bio, rq->errors);
#ifdef CCISS_DEBUG
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
spin_lock_irqsave(&h->lock, flags);
end_that_request_last(rq, rq->errors);
cmd_free(h, cmd,1);
spin_unlock_irqrestore(&h->lock, flags);
}
/* This function will check the usage_count of the drive to be updated/added.
* If the usage_count is zero then the drive information will be updated and
* the disk will be re-registered with the kernel. If not then it will be
@ -1248,6 +1295,8 @@ static void cciss_update_drive_info(int ctlr, int drv_index)
blk_queue_max_sectors(disk->queue, 512);
blk_queue_softirq_done(disk->queue, cciss_softirq_done);
disk->queue->queuedata = hba[ctlr];
blk_queue_hardsect_size(disk->queue,
@ -2147,20 +2196,6 @@ static void start_io( ctlr_info_t *h)
addQ (&(h->cmpQ), c);
}
}
static inline void complete_buffers(struct bio *bio, int status)
{
while (bio) {
struct bio *xbh = bio->bi_next;
int nr_sectors = bio_sectors(bio);
bio->bi_next = NULL;
blk_finished_io(len);
bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
bio = xbh;
}
}
/* Assumes that CCISS_LOCK(h->ctlr) is held. */
/* Zeros out the error record and then resends the command back */
/* to the controller */
@ -2178,39 +2213,6 @@ static inline void resend_cciss_cmd( ctlr_info_t *h, CommandList_struct *c)
start_io(h);
}
static void cciss_softirq_done(struct request *rq)
{
CommandList_struct *cmd = rq->completion_data;
ctlr_info_t *h = hba[cmd->ctlr];
unsigned long flags;
u64bit temp64;
int i, ddir;
if (cmd->Request.Type.Direction == XFER_READ)
ddir = PCI_DMA_FROMDEVICE;
else
ddir = PCI_DMA_TODEVICE;
/* command did not need to be retried */
/* unmap the DMA mapping for all the scatter gather elements */
for(i=0; i<cmd->Header.SGList; i++) {
temp64.val32.lower = cmd->SG[i].Addr.lower;
temp64.val32.upper = cmd->SG[i].Addr.upper;
pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
}
complete_buffers(rq->bio, rq->errors);
#ifdef CCISS_DEBUG
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
spin_lock_irqsave(&h->lock, flags);
end_that_request_last(rq, rq->errors);
cmd_free(h, cmd,1);
spin_unlock_irqrestore(&h->lock, flags);
}
/* checks the status of the job and calls complete buffers to mark all
* buffers for the completed job. Note that this function does not need
* to hold the hba/queue lock.