From: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
Relax the lowmem bounce buffer requirement for imm so that any
low memory page will do -- they don't need to be below the
ISA 16 MB limit, just need to be mapped in low memory.
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
---
drivers/scsi/imm.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
--- linux-2.6.17-rc4.orig/drivers/scsi/imm.c
+++ linux-2.6.17-rc4/drivers/scsi/imm.c
@@ -1119,6 +1119,10 @@ static int device_check(imm_struct *dev)
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);
@@ -1141,10 +1145,6 @@ static struct scsi_host_template imm_tem
.use_clustering = ENABLE_CLUSTERING,
.can_queue = 1,
.slave_alloc = imm_adjust_queue,
- .unchecked_isa_dma = 1, /* imm cannot deal with highmem, so
- * this is an easy trick to ensure
- * all io pages for this host reside
- * in low memory */
};
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