While we really should be killing the block layer bounce buffering ASAP,
I even more urgently need to stop the drivers to fiddle with the limits
from ->slave_configure. Add a no_highmem flag to the Scsi_Host to
centralize this setting and switch the remaining four drivers that use
block layer bounce buffering to it.
Signed-off-by: Christoph Hellwig
---
drivers/scsi/aha152x.c | 8 +---
drivers/scsi/imm.c | 12 +---
drivers/scsi/ppa.c | 8 +---
drivers/scsi/scsi_lib.c| 3 +++
drivers/usb/storage/scsiglue.c | 10 --
drivers/usb/storage/usb.c | 10 ++
include/scsi/scsi_host.h | 2 ++
7 files changed, 18 insertions(+), 35 deletions(-)
diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c
index 055adb349b0e41..83f16fc14d9630 100644
--- a/drivers/scsi/aha152x.c
+++ b/drivers/scsi/aha152x.c
@@ -746,6 +746,7 @@ struct Scsi_Host *aha152x_probe_one(struct aha152x_setup
*setup)
/* need to have host registered before triggering any interrupt */
list_add_tail((shpnt)->host_list, _host_list);
+ shpnt->no_highmem = true;
shpnt->io_port = setup->io_port;
shpnt->n_io_port = IO_RANGE;
shpnt->irq = setup->irq;
@@ -2940,12 +2941,6 @@ static int aha152x_show_info(struct seq_file *m, struct
Scsi_Host *shpnt)
return 0;
}
-static int aha152x_adjust_queue(struct scsi_device *device)
-{
- blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
- return 0;
-}
-
static const struct scsi_host_template aha152x_driver_template = {
.module = THIS_MODULE,
.name = AHA152X_REVID,
@@ -2961,7 +2956,6 @@ static const struct scsi_host_template
aha152x_driver_template = {
.this_id= 7,
.sg_tablesize = SG_ALL,
.dma_boundary = PAGE_SIZE - 1,
- .slave_alloc= aha152x_adjust_queue,
.cmd_size = sizeof(struct aha152x_cmd_priv),
};
diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c
index 180a5ddedb2cda..21339da505f1ea 100644
--- a/drivers/scsi/imm.c
+++ b/drivers/scsi/imm.c
@@ -1100,16 +1100,6 @@ static int device_check(imm_struct *dev, bool autodetect)
return -ENODEV;
}
-/*
- * imm cannot deal with highmem, so this causes all IO pages for this host
- * to reside in low memory (hence mapped)
- */
-static int imm_adjust_queue(struct scsi_device *device)
-{
- blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
- return 0;
-}
-
static const struct scsi_host_template imm_template = {
.module = THIS_MODULE,
.proc_name = "imm",
@@ -1123,7 +1113,6 @@ static const struct scsi_host_template imm_template = {
.this_id= 7,
.sg_tablesize = SG_ALL,
.can_queue = 1,
- .slave_alloc= imm_adjust_queue,
.cmd_size = sizeof(struct scsi_pointer),
};
@@ -1235,6 +1224,7 @@ static int __imm_attach(struct parport *pb)
host = scsi_host_alloc(_template, sizeof(imm_struct *));
if (!host)
goto out1;
+ host->no_highmem = true;
host->io_port = pb->base;
host->n_io_port = ports;
host->dma_channel = -1;
diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index d592ee9170c11f..8300f0bdddb37a 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -986,12 +986,6 @@ static int device_check(ppa_struct *dev, bool autodetect)
return -ENODEV;
}
-static int ppa_adjust_queue(struct scsi_device *device)
-{
- blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
- return 0;
-}
-
static const struct scsi_host_template ppa_template = {
.module = THIS_MODULE,
.proc_name = "ppa",
@@ -1005,7 +999,6 @@ static const struct scsi_host_template ppa_template = {
.this_id= -1,
.sg_tablesize = SG_ALL,
.can_queue = 1,
- .slave_alloc= ppa_adjust_queue,
.cmd_size = sizeof(struct scsi_pointer),
};
@@ -,6 +1104,7 @@ static int __ppa_attach(struct parport *pb)
host = scsi_host_alloc(_template, sizeof(ppa_struct *));
if (!host)
goto out1;
+ host->no_highmem = true;
host->io_port = pb->base;
host->n_io_port = ports;
host->dma_channel = -1;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 1deca84914e87a..f1936f98abe3e2 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1995,6 +1995,9 @@ void scsi_init_limits(struct Scsi_Host *shost, struct
queue_limits *lim)
*/
lim->dma_alignment = max(4, dma_get_cache_alignment()) - 1;
+ if (shost->no_highmem)
+
