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authorDave C Boutcher <sleddog@us.ibm.com>2005-09-13 10:09:02 -0500
committerJames Bottomley <jejb@mulgrave.(none)>2005-09-13 10:15:10 -0500
commit154fb614df83086ceb18a2c19908154e78d4dc98 (patch)
tree4db0b4124cc635d4eadc245ea4716d13ec5d293b /drivers/scsi
parent1c5363153dc7ae694404e7732b4ce36eecc94ca7 (diff)
downloadop-kernel-dev-154fb614df83086ceb18a2c19908154e78d4dc98.zip
op-kernel-dev-154fb614df83086ceb18a2c19908154e78d4dc98.tar.gz
[SCSI] ibmvscsi compatibility fix
Linda Xie ever so gently pointed out that she had a patch to preserve compatibility with older SLES targets, and I told her we didn't need to push it to mainline. This patch explicitly checks the version of the IBMVSCSI target and ensures that large scatterlists are not sent to older targets. Signed-off-by: Linda Xie <lxie@us.ibm.com> Signed-off-by: Dave Boutcher <boutcher@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ibmvscsi/ibmvscsi.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 5b14934..ff25210 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -727,6 +727,16 @@ static void adapter_info_rsp(struct srp_event_struct *evt_struct)
if (hostdata->madapter_info.port_max_txu[0])
hostdata->host->max_sectors =
hostdata->madapter_info.port_max_txu[0] >> 9;
+
+ if (hostdata->madapter_info.os_type == 3 &&
+ strcmp(hostdata->madapter_info.srp_version, "1.6a") <= 0) {
+ printk("ibmvscsi: host (Ver. %s) doesn't support large"
+ "transfers\n",
+ hostdata->madapter_info.srp_version);
+ printk("ibmvscsi: limiting scatterlists to %d\n",
+ MAX_INDIRECT_BUFS);
+ hostdata->host->sg_tablesize = MAX_INDIRECT_BUFS;
+ }
}
}
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