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authorChristof Schmitt <christof.schmitt@de.ibm.com>2010-04-30 18:09:33 +0200
committerJames Bottomley <James.Bottomley@suse.de>2010-05-02 15:42:29 -0400
commit683229845f1780b10041ee7a1043fc8f10061455 (patch)
tree88f58f214666762a71d1458a72646dd65372a1a6 /drivers/s390/scsi/zfcp_aux.c
parent883c98feaab708d0fc976225b146aa9307023c85 (diff)
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[SCSI] zfcp: Report scatter-gather limits to SCSI and block layer
Instead of dealing with large segments in the scatter-gather lists in zfcp_qdio.c, report the limits to the upper layers. With these limits in place, the code for mapping large data blocks to multiple sbales can be removed. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi/zfcp_aux.c')
-rw-r--r--drivers/s390/scsi/zfcp_aux.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 1e6183a86ce5..abf33db647ff 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -545,6 +545,10 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
&zfcp_sysfs_adapter_attrs))
goto failed;
+ /* report size limit per scatter-gather segment */
+ adapter->dma_parms.max_segment_size = ZFCP_QDIO_SBALE_LEN;
+ adapter->ccw_device->dev.dma_parms = &adapter->dma_parms;
+
if (!zfcp_adapter_scsi_register(adapter))
return adapter;