[SCSI] ppa: fix for machines with highmem

ppa cannot handle highmem pages, and like imm, which already has
this patch, the device is slow, so performance is not a big issue,
so just force pages to be in low memory (hence mapped).

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index fee843fab1c7..108910f512e4 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -982,6 +982,12 @@ static int device_check(ppa_struct *dev)
         return -ENODEV;
 }
 
+static int ppa_adjust_queue(struct scsi_device *device)
+{
+        blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
+        return 0;
+}
+
 static struct scsi_host_template ppa_template = {
         .module                 = THIS_MODULE,
         .proc_name              = "ppa",
@@ -997,6 +1003,7 @@ static struct scsi_host_template ppa_template = {
         .cmd_per_lun            = 1,
         .use_clustering         = ENABLE_CLUSTERING,
         .can_queue              = 1,
+        .slave_alloc            = ppa_adjust_queue,
 };
 
 /***************************************************************************