The same effects can be achieved by setting the dma_boundary to
PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those
settings into the drivers. Note that in many cases the setting might
be bogus, but this keeps the status quo.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
Documentation/scsi/scsi_mid_low_api.txt | 2 --
arch/ia64/hp/sim/simscsi.c | 2 +-
drivers/scsi/a2091.c | 2 +-
drivers/scsi/advansys.c | 4 ++--
drivers/scsi/aha152x.c | 2 +-
drivers/scsi/arm/acornscsi.c | 2 +-
drivers/scsi/arm/arxescsi.c | 2 +-
drivers/scsi/arm/cumana_1.c | 2 +-
drivers/scsi/arm/oak.c | 2 +-
drivers/scsi/atari_scsi.c | 2 +-
drivers/scsi/cxgbi/cxgb3i/cxgb3i.c | 2 +-
drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 2 +-
drivers/scsi/dc395x.c | 2 +-
drivers/scsi/dmx3191d.c | 2 +-
drivers/scsi/g_NCR5380.c | 2 +-
drivers/scsi/gvp11.c | 2 +-
drivers/scsi/hosts.c | 1 -
drivers/scsi/ips.c | 1 -
drivers/scsi/iscsi_tcp.c | 2 +-
drivers/scsi/mac_esp.c | 2 +-
drivers/scsi/mac_scsi.c | 2 +-
drivers/scsi/mvumi.c | 2 +-
drivers/scsi/nsp32.c | 2 +-
drivers/scsi/pcmcia/nsp_cs.c | 2 +-
drivers/scsi/pcmcia/qlogic_stub.c | 2 +-
drivers/scsi/qlogicfas.c | 2 +-
drivers/scsi/scsi_debug.c | 3 ++-
drivers/scsi/scsi_lib.c | 3 ---
drivers/scsi/sgiwd93.c | 2 +-
drivers/scsi/stex.c | 2 +-
drivers/scsi/sun3_scsi.c | 2 +-
drivers/scsi/ufs/ufshcd.c | 2 +-
drivers/target/loopback/tcm_loop.c | 2 +-
drivers/usb/storage/uas.c | 2 +-
include/scsi/scsi_host.h | 13 -------------
35 files changed, 32 insertions(+), 51 deletions(-)
diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
index 177c031763c0..c1dd4939f4ae 100644
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ b/Documentation/scsi/scsi_mid_low_api.txt
@@ -1098,8 +1098,6 @@ of interest:
unchecked_isa_dma - 1=>only use bottom 16 MB of ram (ISA DMA addressing
restriction), 0=>can use full 32 bit (or better) DMA
address space
- use_clustering - 1=>SCSI commands in mid level's queue can be merged,
- 0=>disallow SCSI command merging
no_async_abort - 1=>Asynchronous aborts are not supported
0=>Timed-out commands will be aborted asynchronously
hostt - pointer to driver's struct scsi_host_template from which
diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
index 7e1426e76d96..f86844fc0725 100644
--- a/arch/ia64/hp/sim/simscsi.c
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -347,7 +347,7 @@ static struct scsi_host_template driver_template = {
.sg_tablesize = SG_ALL,
.max_sectors = 1024,
.cmd_per_lun = SIMSCSI_REQ_QUEUE_LEN,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static int __init
diff --git a/drivers/scsi/a2091.c b/drivers/scsi/a2091.c
index 61aadc7acb49..c96bc7261a42 100644
--- a/drivers/scsi/a2091.c
+++ b/drivers/scsi/a2091.c
@@ -160,7 +160,7 @@ static struct scsi_host_template a2091_scsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
- .use_clustering = DISABLE_CLUSTERING
+ .dma_boundary = PAGE_SIZE - 1,
};
static int a2091_probe(struct zorro_dev *z, const struct zorro_device_id *ent)
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
index 95b4793c33f4..d37584403c33 100644
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -3192,8 +3192,8 @@ static void asc_prt_driver_conf(struct seq_file *m, struct Scsi_Host *shost)
shost->sg_tablesize, shost->cmd_per_lun);
seq_printf(m,
- " unchecked_isa_dma %d, use_clustering %d\n",
- shost->unchecked_isa_dma, shost->use_clustering);
+ " unchecked_isa_dma %d\n",
+ shost->unchecked_isa_dma);
seq_printf(m,
" flags 0x%x, last_reset 0x%lx, jiffies 0x%lx, asc_n_io_port 0x%x\n",
diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c
index 301b3cad15f8..97872838b983 100644
--- a/drivers/scsi/aha152x.c
+++ b/drivers/scsi/aha152x.c
@@ -2920,7 +2920,7 @@ static struct scsi_host_template aha152x_driver_template = {
.can_queue = 1,
.this_id = 7,
.sg_tablesize = SG_ALL,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.slave_alloc = aha152x_adjust_queue,
};
diff --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c
index 421fe869a11e..d7509859dc00 100644
--- a/drivers/scsi/arm/acornscsi.c
+++ b/drivers/scsi/arm/acornscsi.c
@@ -2890,7 +2890,7 @@ static struct scsi_host_template acornscsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.proc_name = "acornscsi",
};
diff --git a/drivers/scsi/arm/arxescsi.c b/drivers/scsi/arm/arxescsi.c
index 3110736fd337..5e9dd9f34821 100644
--- a/drivers/scsi/arm/arxescsi.c
+++ b/drivers/scsi/arm/arxescsi.c
@@ -245,7 +245,7 @@ static struct scsi_host_template arxescsi_template = {
.can_queue = 0,
.this_id = 7,
.sg_tablesize = SG_ALL,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.proc_name = "arxescsi",
};
diff --git a/drivers/scsi/arm/cumana_1.c b/drivers/scsi/arm/cumana_1.c
index ae1d809904fb..e2d2a81d8e0b 100644
--- a/drivers/scsi/arm/cumana_1.c
+++ b/drivers/scsi/arm/cumana_1.c
@@ -221,10 +221,10 @@ static struct scsi_host_template cumanascsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
.proc_name = "CumanaSCSI-1",
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
+ .dma_boundary = PAGE_SIZE - 1,
};
static int cumanascsi1_probe(struct expansion_card *ec,
diff --git a/drivers/scsi/arm/oak.c b/drivers/scsi/arm/oak.c
index 05b7f755499b..8f2efaab8d46 100644
--- a/drivers/scsi/arm/oak.c
+++ b/drivers/scsi/arm/oak.c
@@ -110,7 +110,7 @@ static struct scsi_host_template oakscsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.proc_name = "oakscsi",
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c
index 89f5154c40b6..a503dc50c4f8 100644
--- a/drivers/scsi/atari_scsi.c
+++ b/drivers/scsi/atari_scsi.c
@@ -714,7 +714,7 @@ static struct scsi_host_template atari_scsi_template = {
.eh_host_reset_handler = atari_scsi_host_reset,
.this_id = 7,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.cmd_size = NCR5380_CMD_SIZE,
};
diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
index bf07735275a4..8a20411699d9 100644
--- a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
+++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
@@ -95,7 +95,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.target_alloc = iscsi_target_alloc,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.this_id = -1,
.track_queue_depth = 1,
};
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 064ef5735182..762337de1116 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -113,7 +113,7 @@ static struct scsi_host_template cxgb4i_host_template = {
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.target_alloc = iscsi_target_alloc,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.this_id = -1,
.track_queue_depth = 1,
};
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c
index 8c55ec6e1827..13fbb2eab842 100644
--- a/drivers/scsi/dc395x.c
+++ b/drivers/scsi/dc395x.c
@@ -4631,7 +4631,7 @@ static struct scsi_host_template dc395x_driver_template = {
.cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
.eh_abort_handler = dc395x_eh_abort,
.eh_bus_reset_handler = dc395x_eh_bus_reset,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
diff --git a/drivers/scsi/dmx3191d.c b/drivers/scsi/dmx3191d.c
index 003c3d726238..8db1cc552932 100644
--- a/drivers/scsi/dmx3191d.c
+++ b/drivers/scsi/dmx3191d.c
@@ -63,7 +63,7 @@ static struct scsi_host_template dmx3191d_driver_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.cmd_size = NCR5380_CMD_SIZE,
};
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index fc538181f8df..9cdca0625498 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -700,7 +700,7 @@ static struct scsi_host_template driver_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
diff --git a/drivers/scsi/gvp11.c b/drivers/scsi/gvp11.c
index a27fc49ebd3a..d2acd0d826e2 100644
--- a/drivers/scsi/gvp11.c
+++ b/drivers/scsi/gvp11.c
@@ -184,7 +184,7 @@ static struct scsi_host_template gvp11_scsi_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
- .use_clustering = DISABLE_CLUSTERING
+ .dma_boundary = PAGE_SIZE - 1,
};
static int check_wd33c93(struct gvp11_scsiregs *regs)
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index e8148ba414a3..fce0b5d7119e 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -431,7 +431,6 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->sg_prot_tablesize = sht->sg_prot_tablesize;
shost->cmd_per_lun = sht->cmd_per_lun;
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
- shost->use_clustering = sht->use_clustering;
shost->no_write_same = sht->no_write_same;
if (shost_eh_deadline == -1 || !sht->eh_host_reset_handler)
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 067725295083..e8bc8d328bab 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -6677,7 +6677,6 @@ ips_register_scsi(int index)
sh->sg_tablesize = sh->hostt->sg_tablesize;
sh->can_queue = sh->hostt->can_queue;
sh->cmd_per_lun = sh->hostt->cmd_per_lun;
- sh->use_clustering = sh->hostt->use_clustering;
sh->max_sectors = 128;
sh->max_id = ha->ntargets;
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 23354f206533..0175684a14dc 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -980,7 +980,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.slave_alloc = iscsi_sw_tcp_slave_alloc,
.slave_configure = iscsi_sw_tcp_slave_configure,
.target_alloc = iscsi_target_alloc,
diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c
index 764d320bb2ca..ee741207fd4e 100644
--- a/drivers/scsi/mac_esp.c
+++ b/drivers/scsi/mac_esp.c
@@ -307,7 +307,7 @@ static int esp_mac_probe(struct platform_device *dev)
goto fail;
host->max_id = 8;
- host->use_clustering = DISABLE_CLUSTERING;
+ host->dma_boundary = PAGE_SIZE - 1;
esp = shost_priv(host);
esp->host = host;
diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
index dd6057359d7c..8b4b5b1a13d7 100644
--- a/drivers/scsi/mac_scsi.c
+++ b/drivers/scsi/mac_scsi.c
@@ -333,7 +333,7 @@ static struct scsi_host_template mac_scsi_template = {
.this_id = 7,
.sg_tablesize = 1,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index d0c3f867fc58..dbe753fba486 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -2197,7 +2197,7 @@ static struct scsi_host_template mvumi_template = {
.eh_timed_out = mvumi_timed_out,
.eh_host_reset_handler = mvumi_host_reset,
.bios_param = mvumi_bios_param,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.this_id = -1,
};
diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
index 5aac3e801903..00e3cbee55b8 100644
--- a/drivers/scsi/nsp32.c
+++ b/drivers/scsi/nsp32.c
@@ -274,7 +274,7 @@ static struct scsi_host_template nsp32_template = {
.sg_tablesize = NSP32_SG_SIZE,
.max_sectors = 128,
.this_id = NSP32_HOST_SCSIID,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.eh_abort_handler = nsp32_eh_abort,
.eh_host_reset_handler = nsp32_eh_host_reset,
/* .highmem_io = 1, */
diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
index f3230494a8c9..1bd6825a4f14 100644
--- a/drivers/scsi/pcmcia/nsp_cs.c
+++ b/drivers/scsi/pcmcia/nsp_cs.c
@@ -86,7 +86,7 @@ static struct scsi_host_template nsp_driver_template = {
.can_queue = 1,
.this_id = NSP_INITIATOR_ID,
.sg_tablesize = SG_ALL,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static nsp_hw_data nsp_data_base; /* attach <-> detect glue */
diff --git a/drivers/scsi/pcmcia/qlogic_stub.c b/drivers/scsi/pcmcia/qlogic_stub.c
index 173351a8554b..828d53faf09a 100644
--- a/drivers/scsi/pcmcia/qlogic_stub.c
+++ b/drivers/scsi/pcmcia/qlogic_stub.c
@@ -72,7 +72,7 @@ static struct scsi_host_template qlogicfas_driver_template = {
.can_queue = 1,
.this_id = -1,
.sg_tablesize = SG_ALL,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
/*====================================================================*/
diff --git a/drivers/scsi/qlogicfas.c b/drivers/scsi/qlogicfas.c
index 95431d605c24..8f709002f746 100644
--- a/drivers/scsi/qlogicfas.c
+++ b/drivers/scsi/qlogicfas.c
@@ -193,7 +193,7 @@ static struct scsi_host_template qlogicfas_driver_template = {
.can_queue = 1,
.this_id = -1,
.sg_tablesize = SG_ALL,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static __init int qlogicfas_init(void)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 57d418d7d74e..16cab45c0439 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5866,7 +5866,8 @@ static int sdebug_driver_probe(struct device *dev)
sdebug_driver_template.can_queue = sdebug_max_queue;
if (!sdebug_clustering)
- sdebug_driver_template.use_clustering = DISABLE_CLUSTERING;
+ sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
+
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
if (NULL == hpnt) {
pr_err("scsi_host_alloc failed\n");
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 2d4fd6b4bd92..966b7cfebdf8 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2230,9 +2230,6 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
blk_queue_max_segment_size(q,
min(shost->max_segment_size, dma_get_max_seg_size(dev)));
- if (shost->use_clustering == DISABLE_CLUSTERING)
- q->limits.cluster = 0;
-
/*
* Set a reasonable default alignment: The larger of 32-byte (dword),
* which is a common minimum for HBAs, and the minimum DMA alignment,
diff --git a/drivers/scsi/sgiwd93.c b/drivers/scsi/sgiwd93.c
index 5ed696dc9bbd..713bce998b0e 100644
--- a/drivers/scsi/sgiwd93.c
+++ b/drivers/scsi/sgiwd93.c
@@ -208,7 +208,7 @@ static struct scsi_host_template sgiwd93_template = {
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 8,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static int sgiwd93_probe(struct platform_device *pdev)
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index af9078320d4b..f6bef7ad65e7 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -1489,7 +1489,7 @@ static struct scsi_host_template driver_template = {
.eh_abort_handler = stex_abort,
.eh_host_reset_handler = stex_reset,
.this_id = -1,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static struct pci_device_id stex_pci_tbl[] = {
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c
index 9492638296c8..95a7ea7eefa0 100644
--- a/drivers/scsi/sun3_scsi.c
+++ b/drivers/scsi/sun3_scsi.c
@@ -500,7 +500,7 @@ static struct scsi_host_template sun3_scsi_template = {
.this_id = 7,
.sg_tablesize = SG_NONE,
.cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.cmd_size = NCR5380_CMD_SIZE,
};
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index e5800da0053d..34be397da0f3 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6982,7 +6982,7 @@ static struct scsi_host_template ufshcd_driver_template = {
.max_host_blocked = 1,
.track_queue_depth = 1,
.sdev_groups = ufshcd_driver_groups,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index b0991e86587f..7bd7c0c0db6f 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -324,7 +324,7 @@ static struct scsi_host_template tcm_loop_driver_template = {
.sg_tablesize = 256,
.cmd_per_lun = 1024,
.max_sectors = 0xFFFF,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
.slave_alloc = tcm_loop_slave_alloc,
.module = THIS_MODULE,
.track_queue_depth = 1,
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 6c75a0a50b3a..36742e8e7edc 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -879,7 +879,7 @@ static struct scsi_host_template uas_host_template = {
.this_id = -1,
.sg_tablesize = SG_NONE,
.skip_settle_delay = 1,
- .use_clustering = DISABLE_CLUSTERING,
+ .dma_boundary = PAGE_SIZE - 1,
};
#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 834204681ca3..7ba34a0ca8bf 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -44,8 +44,6 @@ struct blk_queue_tags;
#define MODE_INITIATOR 0x01
#define MODE_TARGET 0x02
-#define DISABLE_CLUSTERING (-1)
-
struct scsi_host_template {
struct module *module;
const char *name;
@@ -418,16 +416,6 @@ struct scsi_host_template {
*/
unsigned unchecked_isa_dma:1;
- /*
- * True if this host adapter can make good use of clustering.
- * I originally thought that if the tablesize was large that it
- * was a waste of CPU cycles to prepare a cluster list, but
- * it works out that the Buslogic is faster if you use a smaller
- * number of segments (i.e. use clustering). I guess it is
- * inefficient.
- */
- unsigned use_clustering:1;
-
/*
* True for emulated SCSI host adapters (e.g. ATAPI).
*/
@@ -626,7 +614,6 @@ struct Scsi_Host {
unsigned active_mode:2;
unsigned unchecked_isa_dma:1;
- unsigned use_clustering:1;
/*
* Host has requested that no further requests come through for the
--
2.19.2
