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[SCSI] imm: no need for unchecked_isa_dma

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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@xenotime.net>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Randy Dunlap 2006-05-19 11:55:58 -07:00 committed by James Bottomley
parent 818bf49352
commit 979dca3826
1 changed files with 4 additions and 4 deletions
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8
drivers/scsi/imm.c
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@ -1119,6 +1119,10 @@ static int device_check(imm_struct *dev)
return -ENODEV; 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) static int imm_adjust_queue(struct scsi_device *device)
{ {
blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH); blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
@ -1141,10 +1145,6 @@ static struct scsi_host_template imm_template = {
.use_clustering = ENABLE_CLUSTERING, .use_clustering = ENABLE_CLUSTERING,
.can_queue = 1, .can_queue = 1,
.slave_alloc = imm_adjust_queue, .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 */
}; };
/*************************************************************************** /***************************************************************************