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From: Swen Schillig <swen@vnet.ibm.com>
To: linux-scsi@vger.kernel.org
Cc: James Bottomley <James.Bottomley@steeleye.com>
Subject: [PATCH] zfcp: initialize scsi_host_template.max_sectors with appropriate value
Date: Mon, 9 Oct 2006 15:33:42 +0200	[thread overview]
Message-ID: <200610091533.42282.swen@vnet.ibm.com> (raw)

commit 7f3c3e955cfba57c4d95706c326d9c5b2f92e941
Author: Swen Schillig <swen@vnet.ibm.com>
Date:   Mon Oct 9 14:59:08 2006 +0200

Define (ZFCP_MAX_SECTORS) and initialize scsi_host_template.max_sectors with 
appropriate value.

     ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
        /* max. number of (data buffer) SBALEs in largest SBAL chain
           multiplied with number of sectors per 4k block */

##############################################

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 8f88269..88591a4 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -107,6 +107,10 @@ #define ZFCP_MAX_SBALES_PER_REQ            \
        (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
         /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */

+#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
+       /* max. number of (data buffer) SBALEs in largest SBAL chain
+          multiplied with number of sectors per 4k block */
+
 /* FIXME(tune): free space should be one max. SBAL chain plus what? */
 #define ZFCP_QDIO_PCI_INTERVAL         (QDIO_MAX_BUFFERS_PER_Q \
                                          - (ZFCP_MAX_SBALS_PER_REQ + 4))
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 7cafa34..71fee53 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -58,6 +58,7 @@ struct zfcp_data zfcp_data = {
                .cmd_per_lun            = 1,
                .use_clustering         = 1,
                .sdev_attrs             = zfcp_sysfs_sdev_attrs,
+               .max_sectors            = ZFCP_MAX_SECTORS,
        },
        .driver_version = ZFCP_VERSION,
 };

             reply	other threads:[~2006-10-09 13:33 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-09 13:33 Swen Schillig [this message]
2006-10-11 15:05 ` [PATCH] zfcp: initialize scsi_host_template.max_sectors with appropriate value James Bottomley
2006-10-12  9:43   ` Swen Schillig

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