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[PATCH] cciss per disk queue

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This patch adds per disk queue functionality to cciss.  Sometime back I
submitted a patch but it looks like only part of what I needed.  In the 2.6
kernel if we have more than one logical volume the driver will Oops during
rmmod.  It seems all of the queues actually point back to the same queue.
So after deleting the first volume you hit a null pointer on the second
one.

This has been tested in our labs.  There is no difference in performance,
it just fixes the Oops.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mike Miller 2005-07-28 01:07:31 -07:00 committed by Linus Torvalds
parent eaaf9c68e7
commit ad2b93123d
2 changed files with 28 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/block/cciss.c
View File

@ -1135,7 +1135,7 @@ static int revalidate_allvol(ctlr_info_t *host)
/* this is for the online array utilities */
if (!drv->heads && i)
continue;
blk_queue_hardsect_size(host->queue, drv->block_size);
blk_queue_hardsect_size(drv->queue, drv->block_size);
set_capacity(disk, drv->nr_blocks);
add_disk(disk);
}
@ -1691,7 +1691,7 @@ static int cciss_revalidate(struct gendisk *disk)
cciss_read_capacity(h->ctlr, logvol, size_buff, 1, &total_size, &block_size);
cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size, inq_buff, drv);
blk_queue_hardsect_size(h->queue, drv->block_size);
blk_queue_hardsect_size(drv->queue, drv->block_size);
set_capacity(disk, drv->nr_blocks);
kfree(size_buff);
@ -2248,12 +2248,12 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs)
* them up. We will also keep track of the next queue to run so
* that every queue gets a chance to be started first.
*/
for (j=0; j < NWD; j++){
int curr_queue = (start_queue + j) % NWD;
for (j=0; j < h->highest_lun + 1; j++){
int curr_queue = (start_queue + j) % (h->highest_lun + 1);
/* make sure the disk has been added and the drive is real
* because this can be called from the middle of init_one.
*/
if(!(h->gendisk[curr_queue]->queue) ||
if(!(h->drv[curr_queue].queue) ||
!(h->drv[curr_queue].heads))
continue;
blk_start_queue(h->gendisk[curr_queue]->queue);
@ -2264,14 +2264,14 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs)
if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS)
{
if (curr_queue == start_queue){
h->next_to_run = (start_queue + 1) % NWD;
h->next_to_run = (start_queue + 1) % (h->highest_lun + 1);
goto cleanup;
} else {
h->next_to_run = curr_queue;
goto cleanup;
}
} else {
curr_queue = (curr_queue + 1) % NWD;
curr_queue = (curr_queue + 1) % (h->highest_lun + 1);
}
}
@ -2279,7 +2279,6 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs)
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return IRQ_HANDLED;
}
/*
* We cannot read the structure directly, for portablity we must use
* the io functions.
@ -2789,13 +2788,6 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
}
spin_lock_init(&hba[i]->lock);
q = blk_init_queue(do_cciss_request, &hba[i]->lock);
if (!q)
goto clean4;
q->backing_dev_info.ra_pages = READ_AHEAD;
hba[i]->queue = q;
q->queuedata = hba[i];
/* Initialize the pdev driver private data.
have it point to hba[i]. */
@ -2817,6 +2809,20 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
cciss_procinit(i);
for(j=0; j < NWD; j++) { /* mfm */
drive_info_struct *drv = &(hba[i]->drv[j]);
struct gendisk *disk = hba[i]->gendisk[j];
q = blk_init_queue(do_cciss_request, &hba[i]->lock);
if (!q) {
printk(KERN_ERR
"cciss: unable to allocate queue for disk %d\n",
j);
break;
}
drv->queue = q;
q->backing_dev_info.ra_pages = READ_AHEAD;
blk_queue_bounce_limit(q, hba[i]->pdev->dma_mask);
/* This is a hardware imposed limit. */
@ -2827,26 +2833,23 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
blk_queue_max_sectors(q, 512);
for(j=0; j<NWD; j++) {
drive_info_struct *drv = &(hba[i]->drv[j]);
struct gendisk *disk = hba[i]->gendisk[j];
q->queuedata = hba[i];
sprintf(disk->disk_name, "cciss/c%dd%d", i, j);
sprintf(disk->devfs_name, "cciss/host%d/target%d", i, j);
disk->major = hba[i]->major;
disk->first_minor = j << NWD_SHIFT;
disk->fops = &cciss_fops;
disk->queue = hba[i]->queue;
disk->queue = q;
disk->private_data = drv;
/* we must register the controller even if no disks exist */
/* this is for the online array utilities */
if(!drv->heads && j)
continue;
blk_queue_hardsect_size(hba[i]->queue, drv->block_size);
blk_queue_hardsect_size(q, drv->block_size);
set_capacity(disk, drv->nr_blocks);
add_disk(disk);
}
return(1);
clean4:
@ -2912,10 +2915,10 @@ static void __devexit cciss_remove_one (struct pci_dev *pdev)
for (j = 0; j < NWD; j++) {
struct gendisk *disk = hba[i]->gendisk[j];
if (disk->flags & GENHD_FL_UP)
blk_cleanup_queue(disk->queue);
del_gendisk(disk);
}
blk_cleanup_queue(hba[i]->queue);
pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof(CommandList_struct),
hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
pci_free_consistent(hba[i]->pdev, NR_CMDS * sizeof( ErrorInfo_struct),

4
drivers/block/cciss.h
View File

@ -29,6 +29,7 @@ typedef struct _drive_info_struct
{
__u32 LunID;
int usage_count;
struct request_queue *queue;
sector_t nr_blocks;
int block_size;
int heads;
@ -72,7 +73,6 @@ struct ctlr_info
unsigned int maxQsinceinit;
unsigned int maxSG;
spinlock_t lock;
struct request_queue *queue;
//* pointers to command and error info pool */
CommandList_struct *cmd_pool;
@ -260,7 +260,7 @@ struct board_type {
struct access_method *access;
};
#define CCISS_LOCK(i) (hba[i]->queue->queue_lock)
#define CCISS_LOCK(i) (&hba[i]->lock)
#endif /* CCISS_H */