block: Consolidate phys_segment and hw_segment limits
Except for SCSI no device drivers distinguish between physical and
hardware segment limits. Consolidate the two into a single segment
limit.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index c2051b0..c1ff6903 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -849,7 +849,7 @@
}
ubd_dev->queue->queuedata = ubd_dev;
- blk_queue_max_hw_segments(ubd_dev->queue, MAX_SG);
+ blk_queue_max_segments(ubd_dev->queue, MAX_SG);
err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);
if(err){
*error_out = "Failed to register device";
diff --git a/block/blk-core.c b/block/blk-core.c
index 36c0dee..9fe174d 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1614,8 +1614,7 @@
* limitation.
*/
blk_recalc_rq_segments(rq);
- if (rq->nr_phys_segments > queue_max_phys_segments(q) ||
- rq->nr_phys_segments > queue_max_hw_segments(q)) {
+ if (rq->nr_phys_segments > queue_max_segments(q)) {
printk(KERN_ERR "%s: over max segments limit.\n", __func__);
return -EIO;
}
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 99cb5cf..5e7dc99 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -206,8 +206,7 @@
{
int nr_phys_segs = bio_phys_segments(q, bio);
- if (req->nr_phys_segments + nr_phys_segs > queue_max_hw_segments(q) ||
- req->nr_phys_segments + nr_phys_segs > queue_max_phys_segments(q)) {
+ if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(q)) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@@ -300,10 +299,7 @@
total_phys_segments--;
}
- if (total_phys_segments > queue_max_phys_segments(q))
- return 0;
-
- if (total_phys_segments > queue_max_hw_segments(q))
+ if (total_phys_segments > queue_max_segments(q))
return 0;
/* Merge is OK... */
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 61afae9..31e7a93 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -91,8 +91,7 @@
*/
void blk_set_default_limits(struct queue_limits *lim)
{
- lim->max_phys_segments = MAX_PHYS_SEGMENTS;
- lim->max_hw_segments = MAX_HW_SEGMENTS;
+ lim->max_segments = BLK_MAX_SEGMENTS;
lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
lim->max_segment_size = BLK_MAX_SEGMENT_SIZE;
lim->max_sectors = BLK_DEF_MAX_SECTORS;
@@ -252,17 +251,15 @@
EXPORT_SYMBOL(blk_queue_max_discard_sectors);
/**
- * blk_queue_max_phys_segments - set max phys segments for a request for this queue
+ * blk_queue_max_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
* @max_segments: max number of segments
*
* Description:
* Enables a low level driver to set an upper limit on the number of
- * physical data segments in a request. This would be the largest sized
- * scatter list the driver could handle.
+ * hw data segments in a request.
**/
-void blk_queue_max_phys_segments(struct request_queue *q,
- unsigned short max_segments)
+void blk_queue_max_segments(struct request_queue *q, unsigned short max_segments)
{
if (!max_segments) {
max_segments = 1;
@@ -270,33 +267,9 @@
__func__, max_segments);
}
- q->limits.max_phys_segments = max_segments;
+ q->limits.max_segments = max_segments;
}
-EXPORT_SYMBOL(blk_queue_max_phys_segments);
-
-/**
- * blk_queue_max_hw_segments - set max hw segments for a request for this queue
- * @q: the request queue for the device
- * @max_segments: max number of segments
- *
- * Description:
- * Enables a low level driver to set an upper limit on the number of
- * hw data segments in a request. This would be the largest number of
- * address/length pairs the host adapter can actually give at once
- * to the device.
- **/
-void blk_queue_max_hw_segments(struct request_queue *q,
- unsigned short max_segments)
-{
- if (!max_segments) {
- max_segments = 1;
- printk(KERN_INFO "%s: set to minimum %d\n",
- __func__, max_segments);
- }
-
- q->limits.max_hw_segments = max_segments;
-}
-EXPORT_SYMBOL(blk_queue_max_hw_segments);
+EXPORT_SYMBOL(blk_queue_max_segments);
/**
* blk_queue_max_segment_size - set max segment size for blk_rq_map_sg
@@ -531,11 +504,7 @@
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
b->seg_boundary_mask);
- t->max_phys_segments = min_not_zero(t->max_phys_segments,
- b->max_phys_segments);
-
- t->max_hw_segments = min_not_zero(t->max_hw_segments,
- b->max_hw_segments);
+ t->max_segments = min_not_zero(t->max_segments, b->max_segments);
t->max_segment_size = min_not_zero(t->max_segment_size,
b->max_segment_size);
@@ -739,22 +708,19 @@
* does is adjust the queue so that the buf is always appended
* silently to the scatterlist.
*
- * Note: This routine adjusts max_hw_segments to make room for
- * appending the drain buffer. If you call
- * blk_queue_max_hw_segments() or blk_queue_max_phys_segments() after
- * calling this routine, you must set the limit to one fewer than your
- * device can support otherwise there won't be room for the drain
- * buffer.
+ * Note: This routine adjusts max_hw_segments to make room for appending
+ * the drain buffer. If you call blk_queue_max_segments() after calling
+ * this routine, you must set the limit to one fewer than your device
+ * can support otherwise there won't be room for the drain buffer.
*/
int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size)
{
- if (queue_max_hw_segments(q) < 2 || queue_max_phys_segments(q) < 2)
+ if (queue_max_segments(q) < 2)
return -EINVAL;
/* make room for appending the drain */
- blk_queue_max_hw_segments(q, queue_max_hw_segments(q) - 1);
- blk_queue_max_phys_segments(q, queue_max_phys_segments(q) - 1);
+ blk_queue_max_segments(q, queue_max_segments(q) - 1);
q->dma_drain_needed = dma_drain_needed;
q->dma_drain_buffer = buf;
q->dma_drain_size = size;
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 0c82d33..684fe04 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -772,7 +772,7 @@
}
blk_queue_segment_boundary(sdev->request_queue, segment_boundary);
- blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize);
+ blk_queue_max_segments(sdev->request_queue, sg_tablesize);
ata_port_printk(ap, KERN_INFO,
"DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu\n",
(unsigned long long)*ap->host->dev->dma_mask,
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 1c0cd35..459f1bc 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -2534,7 +2534,7 @@
blk_queue_bounce_limit(RequestQueue, Controller->BounceBufferLimit);
RequestQueue->queuedata = Controller;
blk_queue_max_hw_segments(RequestQueue, Controller->DriverScatterGatherLimit);
- blk_queue_max_phys_segments(RequestQueue, Controller->DriverScatterGatherLimit);
+ blk_queue_max_segments(RequestQueue, Controller->DriverScatterGatherLimit);
blk_queue_max_hw_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
disk->queue = RequestQueue;
sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 030e52d..a29e694 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1797,10 +1797,7 @@
blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
/* This is a hardware imposed limit. */
- blk_queue_max_hw_segments(disk->queue, h->maxsgentries);
-
- /* This is a limit in the driver and could be eliminated. */
- blk_queue_max_phys_segments(disk->queue, h->maxsgentries);
+ blk_queue_max_segments(disk->queue, h->maxsgentries);
blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 6422651..91d1163 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -448,11 +448,8 @@
blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
/* This is a hardware imposed limit. */
- blk_queue_max_hw_segments(q, SG_MAX);
+ blk_queue_max_segments(q, SG_MAX);
- /* This is a driver limit and could be eliminated. */
- blk_queue_max_phys_segments(q, SG_MAX);
-
init_timer(&hba[i]->timer);
hba[i]->timer.expires = jiffies + IDA_TIMER;
hba[i]->timer.data = (unsigned long)hba[i];
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 9b55e64..4df3b40 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -710,8 +710,7 @@
max_seg_s = min(queue_max_sectors(b) * queue_logical_block_size(b), max_seg_s);
blk_queue_max_hw_sectors(q, max_seg_s >> 9);
- blk_queue_max_phys_segments(q, max_segments ? max_segments : MAX_PHYS_SEGMENTS);
- blk_queue_max_hw_segments(q, max_segments ? max_segments : MAX_HW_SEGMENTS);
+ blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
blk_queue_max_segment_size(q, max_seg_s);
blk_queue_logical_block_size(q, 512);
blk_queue_segment_boundary(q, PAGE_SIZE-1);
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index ea54ea3..ddb4f9a 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -956,8 +956,7 @@
return -ENOMEM;
}
- blk_queue_max_phys_segments(pf_queue, cluster);
- blk_queue_max_hw_segments(pf_queue, cluster);
+ blk_queue_max_segments(pf_queue, cluster);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
struct gendisk *disk = pf->disk;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 6e1daa24..b72935b8 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -950,14 +950,14 @@
static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_queue *q)
{
if ((pd->settings.size << 9) / CD_FRAMESIZE
- <= queue_max_phys_segments(q)) {
+ <= queue_max_segments(q)) {
/*
* The cdrom device can handle one segment/frame
*/
clear_bit(PACKET_MERGE_SEGS, &pd->flags);
return 0;
} else if ((pd->settings.size << 9) / PAGE_SIZE
- <= queue_max_phys_segments(q)) {
+ <= queue_max_segments(q)) {
/*
* We can handle this case at the expense of some extra memory
* copies during write operations
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index 9cd1a4a..bc95469 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -482,8 +482,7 @@
blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
ps3disk_prepare_flush);
- blk_queue_max_phys_segments(queue, -1);
- blk_queue_max_hw_segments(queue, -1);
+ blk_queue_max_segments(queue, -1);
blk_queue_max_segment_size(queue, dev->bounce_size);
gendisk = alloc_disk(PS3DISK_MINORS);
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index 6416b26..83ebb39 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -751,8 +751,7 @@
priv->queue = queue;
queue->queuedata = dev;
blk_queue_make_request(queue, ps3vram_make_request);
- blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
- blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
+ blk_queue_max_segments(queue, BLK_MAX_HW_SEGMENTS);
blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index dd30cdd..48e8fee 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -691,8 +691,7 @@
port->disk = g;
- blk_queue_max_hw_segments(q, port->ring_cookies);
- blk_queue_max_phys_segments(q, port->ring_cookies);
+ blk_queue_max_segments(q, port->ring_cookies);
blk_queue_max_hw_sectors(q, port->max_xfer_size);
g->major = vdc_major;
g->first_minor = port->vio.vdev->dev_no << PARTITION_SHIFT;
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index 7bd7b2f..b70f0fc 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -1518,8 +1518,7 @@
break;
}
disk->queue = q;
- blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG);
- blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG);
+ blk_queue_max_segments(q, CARM_MAX_REQ_SG);
blk_queue_segment_boundary(q, CARM_SG_BOUNDARY);
q->queuedata = port;
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 352ea24..2e88983 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -2320,8 +2320,7 @@
disk->queue = q;
blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
- blk_queue_max_hw_segments(q, UB_MAX_REQ_SG);
- blk_queue_max_phys_segments(q, UB_MAX_REQ_SG);
+ blk_queue_max_segments(q, UB_MAX_REQ_SG);
blk_queue_segment_boundary(q, 0xffffffff); /* Dubious. */
blk_queue_max_hw_sectors(q, UB_MAX_SECTORS);
blk_queue_logical_block_size(q, lun->capacity.bsize);
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index d44ece7..c12b313 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -471,8 +471,7 @@
}
d->disk = g;
- blk_queue_max_hw_segments(q, VIOMAXBLOCKDMA);
- blk_queue_max_phys_segments(q, VIOMAXBLOCKDMA);
+ blk_queue_max_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_hw_sectors(q, VIODASD_MAXSECTORS);
g->major = VIODASD_MAJOR;
g->first_minor = dev_no << PARTITION_SHIFT;
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index f9861aa..9c09694 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -353,8 +353,7 @@
blk_queue_max_segment_size(rq, PAGE_SIZE);
/* Ensure a merged request will fit in a single I/O ring slot. */
- blk_queue_max_phys_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
- blk_queue_max_hw_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
+ blk_queue_max_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
/* Make sure buffer addresses are sector-aligned. */
blk_queue_dma_alignment(rq, 511);
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index e789e6c..03c71f7 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -741,7 +741,7 @@
{
blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
/* using DMA so memory will need to be contiguous */
- blk_queue_max_hw_segments(gd.gdrom_rq, 1);
+ blk_queue_max_segments(gd.gdrom_rq, 1);
/* set a large max size to get most from DMA */
blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
gd.disk->queue = gd.gdrom_rq;
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index b1dfd23..cc435be 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -616,8 +616,7 @@
gendisk->first_minor = deviceno;
strncpy(gendisk->disk_name, c->name,
sizeof(gendisk->disk_name));
- blk_queue_max_hw_segments(q, 1);
- blk_queue_max_phys_segments(q, 1);
+ blk_queue_max_segments(q, 1);
blk_queue_max_hw_sectors(q, 4096 / 512);
gendisk->queue = q;
gendisk->fops = &viocd_fops;
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 1ec8b31..f8c1ae6 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -790,8 +790,7 @@
max_sg_entries >>= 1;
#endif /* CONFIG_PCI */
- blk_queue_max_hw_segments(q, max_sg_entries);
- blk_queue_max_phys_segments(q, max_sg_entries);
+ blk_queue_max_segments(q, max_sg_entries);
/* assign drive queue */
drive->queue = q;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ceb24af..509c8f3 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3739,7 +3739,7 @@
if ((bi->bi_size>>9) > queue_max_sectors(q))
return 0;
blk_recount_segments(q, bi);
- if (bi->bi_phys_segments > queue_max_phys_segments(q))
+ if (bi->bi_phys_segments > queue_max_segments(q))
return 0;
if (q->merge_bvec_fn)
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 44d4178..972b870 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -1227,8 +1227,7 @@
blk_queue_bounce_limit(msb->queue, limit);
blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
- blk_queue_max_phys_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
- blk_queue_max_hw_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
+ blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
blk_queue_max_segment_size(msb->queue,
MSPRO_BLOCK_MAX_PAGES * msb->page_size);
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index d033cfd..2658b14 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -1065,9 +1065,8 @@
queue = gd->queue;
queue->queuedata = i2o_blk_dev;
- blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS);
blk_queue_max_hw_sectors(queue, max_sectors);
- blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size));
+ blk_queue_max_segments(queue, i2o_sg_tablesize(c, body_size));
osm_debug("max sectors = %d\n", queue->max_sectors);
osm_debug("phys segments = %d\n", queue->max_phys_segments);
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 09b633d..381fe03 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -155,8 +155,7 @@
if (mq->bounce_buf) {
blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
- blk_queue_max_phys_segments(mq->queue, bouncesz / 512);
- blk_queue_max_hw_segments(mq->queue, bouncesz / 512);
+ blk_queue_max_segments(mq->queue, bouncesz / 512);
blk_queue_max_segment_size(mq->queue, bouncesz);
mq->sg = kmalloc(sizeof(struct scatterlist),
@@ -182,8 +181,7 @@
blk_queue_bounce_limit(mq->queue, limit);
blk_queue_max_hw_sectors(mq->queue,
min(host->max_blk_count, host->max_req_size / 512));
- blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
- blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
+ blk_queue_max_segments(mq->queue, host->max_hw_segs);
blk_queue_max_segment_size(mq->queue, host->max_seg_size);
mq->sg = kmalloc(sizeof(struct scatterlist) *
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 14b1e25..8831e93 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2130,8 +2130,7 @@
blk_queue_logical_block_size(block->request_queue, block->bp_block);
max = block->base->discipline->max_blocks << block->s2b_shift;
blk_queue_max_hw_sectors(block->request_queue, max);
- blk_queue_max_phys_segments(block->request_queue, -1L);
- blk_queue_max_hw_segments(block->request_queue, -1L);
+ blk_queue_max_segments(block->request_queue, -1L);
/* with page sized segments we can translate each segement into
* one idaw/tidaw
*/
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index 509ed056..097da8c 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -223,8 +223,7 @@
blk_queue_logical_block_size(blkdat->request_queue, TAPEBLOCK_HSEC_SIZE);
blk_queue_max_hw_sectors(blkdat->request_queue, TAPEBLOCK_MAX_SEC);
- blk_queue_max_phys_segments(blkdat->request_queue, -1L);
- blk_queue_max_hw_segments(blkdat->request_queue, -1L);
+ blk_queue_max_segments(blkdat->request_queue, -1L);
blk_queue_max_segment_size(blkdat->request_queue, -1L);
blk_queue_segment_boundary(blkdat->request_queue, -1L);
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 87b536a..732f6d3 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -4195,7 +4195,7 @@
if (tgt->service_parms.class3_parms[0] & 0x80000000)
rport->supported_classes |= FC_COS_CLASS3;
if (rport->rqst_q)
- blk_queue_max_hw_segments(rport->rqst_q, 1);
+ blk_queue_max_segments(rport->rqst_q, 1);
} else
tgt_dbg(tgt, "rport add failed\n");
spin_unlock_irqrestore(vhost->host->host_lock, flags);
@@ -4669,7 +4669,7 @@
}
if (shost_to_fc_host(shost)->rqst_q)
- blk_queue_max_hw_segments(shost_to_fc_host(shost)->rqst_q, 1);
+ blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
dev_set_drvdata(dev, vhost);
spin_lock(&ibmvfc_driver_lock);
list_add_tail(&vhost->queue, &ibmvfc_head);
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index ac3cca7..f8fbf47 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1624,8 +1624,8 @@
/*
* this limit is imposed by hardware restrictions
*/
- blk_queue_max_hw_segments(q, shost->sg_tablesize);
- blk_queue_max_phys_segments(q, SCSI_MAX_SG_CHAIN_SEGMENTS);
+ blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,
+ SCSI_MAX_SG_CHAIN_SEGMENTS));
blk_queue_max_hw_sectors(q, shost->max_sectors);
blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 040f751..c996d98 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -287,8 +287,7 @@
if (list_empty(&sdp->sfds)) { /* no existing opens on this device */
sdp->sgdebug = 0;
q = sdp->device->request_queue;
- sdp->sg_tablesize = min(queue_max_hw_segments(q),
- queue_max_phys_segments(q));
+ sdp->sg_tablesize = queue_max_segments(q);
}
if ((sfp = sg_add_sfp(sdp, dev)))
filp->private_data = sfp;
@@ -1376,8 +1375,7 @@
sdp->device = scsidp;
INIT_LIST_HEAD(&sdp->sfds);
init_waitqueue_head(&sdp->o_excl_wait);
- sdp->sg_tablesize = min(queue_max_hw_segments(q),
- queue_max_phys_segments(q));
+ sdp->sg_tablesize = queue_max_segments(q);
sdp->index = k;
kref_init(&sdp->d_ref);
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index d04ea9a..f67d1a1 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3983,8 +3983,7 @@
return -ENODEV;
}
- i = min(queue_max_hw_segments(SDp->request_queue),
- queue_max_phys_segments(SDp->request_queue));
+ i = queue_max_segments(SDp->request_queue);
if (st_max_sg_segs < i)
i = st_max_sg_segs;
buffer = new_tape_buffer((SDp->host)->unchecked_isa_dma, i);
diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c
index 62b2828..45d9081 100644
--- a/drivers/staging/hv/blkvsc_drv.c
+++ b/drivers/staging/hv/blkvsc_drv.c
@@ -363,10 +363,7 @@
blkdev->gd->queue = blk_init_queue(blkvsc_request, &blkdev->lock);
blk_queue_max_segment_size(blkdev->gd->queue, PAGE_SIZE);
- blk_queue_max_phys_segments(blkdev->gd->queue,
- MAX_MULTIPAGE_BUFFER_COUNT);
- blk_queue_max_hw_segments(blkdev->gd->queue,
- MAX_MULTIPAGE_BUFFER_COUNT);
+ blk_queue_max_segments(blkdev->gd->queue, MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_segment_boundary(blkdev->gd->queue, PAGE_SIZE-1);
blk_queue_bounce_limit(blkdev->gd->queue, BLK_BOUNCE_ANY);
blk_queue_dma_alignment(blkdev->gd->queue, 511);
diff --git a/fs/bio.c b/fs/bio.c
index 88094af..dc17afd 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -507,10 +507,8 @@
int nr_pages;
nr_pages = ((queue_max_sectors(q) << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
- if (nr_pages > queue_max_phys_segments(q))
- nr_pages = queue_max_phys_segments(q);
- if (nr_pages > queue_max_hw_segments(q))
- nr_pages = queue_max_hw_segments(q);
+ if (nr_pages > queue_max_segments(q))
+ nr_pages = queue_max_segments(q);
return nr_pages;
}
@@ -575,8 +573,7 @@
* make this too complex.
*/
- while (bio->bi_phys_segments >= queue_max_phys_segments(q)
- || bio->bi_phys_segments >= queue_max_hw_segments(q)) {
+ while (bio->bi_phys_segments >= queue_max_segments(q)) {
if (retried_segments)
return 0;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 57bc4844..ebd22db 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -316,8 +316,7 @@
unsigned int discard_alignment;
unsigned short logical_block_size;
- unsigned short max_hw_segments;
- unsigned short max_phys_segments;
+ unsigned short max_segments;
unsigned char misaligned;
unsigned char discard_misaligned;
@@ -929,8 +928,19 @@
blk_queue_max_hw_sectors(q, max);
}
-extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
-extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_segments(struct request_queue *, unsigned short);
+
+static inline void blk_queue_max_phys_segments(struct request_queue *q, unsigned short max)
+{
+ blk_queue_max_segments(q, max);
+}
+
+static inline void blk_queue_max_hw_segments(struct request_queue *q, unsigned short max)
+{
+ blk_queue_max_segments(q, max);
+}
+
+
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
extern void blk_queue_max_discard_sectors(struct request_queue *q,
unsigned int max_discard_sectors);
@@ -1055,14 +1065,9 @@
return q->limits.max_hw_sectors;
}
-static inline unsigned short queue_max_hw_segments(struct request_queue *q)
+static inline unsigned short queue_max_segments(struct request_queue *q)
{
- return q->limits.max_hw_segments;
-}
-
-static inline unsigned short queue_max_phys_segments(struct request_queue *q)
-{
- return q->limits.max_phys_segments;
+ return q->limits.max_segments;
}
static inline unsigned int queue_max_segment_size(struct request_queue *q)
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 4c4e57d..87018dc 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -385,7 +385,7 @@
/* defines for max_sectors and max_phys_segments */
#define I2O_MAX_SECTORS 1024
#define I2O_MAX_SECTORS_LIMITED 128
-#define I2O_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
+#define I2O_MAX_PHYS_SEGMENTS BLK_MAX_SEGMENTS
/*
* Message structures