[SCSI] dpt_i2o: convert to use the data buffer accessors

- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ACK. Code inspected. Driver changes NOT unit tested or compile tested.
Acked-by: "Salyzyn, Mark" <mark_salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index 8c7d2bbf9b1a848b90b19a2edd1663e0164c0a2b..2e2362d787ca54037ea0687da2df08526173317c 100644 (file)
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -2078,12 +2078,13 @@ static s32 adpt_scsi_to_i2o(adpt_hba* pHba, struct scsi_cmnd* cmd, struct adpt_d
        u32 *lenptr;
        int direction;
        int scsidir;
+       int nseg;
        u32 len;
        u32 reqlen;
        s32 rcode;
 
        memset(msg, 0 , sizeof(msg));
-       len = cmd->request_bufflen;
+       len = scsi_bufflen(cmd);
        direction = 0x00000000; 
        
        scsidir = 0x00000000;                   // DATA NO XFER
@@ -2140,21 +2141,21 @@ static s32 adpt_scsi_to_i2o(adpt_hba* pHba, struct scsi_cmnd* cmd, struct adpt_d
        lenptr=mptr++;          /* Remember me - fill in when we know */
        reqlen = 14;            // SINGLE SGE
        /* Now fill in the SGList and command */
-       if(cmd->use_sg) {
-               struct scatterlist *sg = (struct scatterlist *)cmd->request_buffer;
-               int sg_count = pci_map_sg(pHba->pDev, sg, cmd->use_sg,
-                               cmd->sc_data_direction);
 
+       nseg = scsi_dma_map(cmd);
+       BUG_ON(nseg < 0);
+       if (nseg) {
+               struct scatterlist *sg;
 
                len = 0;
-               for(i = 0 ; i < sg_count; i++) {
+               scsi_for_each_sg(cmd, sg, nseg, i) {
                        *mptr++ = direction|0x10000000|sg_dma_len(sg);
                        len+=sg_dma_len(sg);
                        *mptr++ = sg_dma_address(sg);
-                       sg++;
+                       /* Make this an end of list */
+                       if (i == nseg - 1)
+                               mptr[-2] = direction|0xD0000000|sg_dma_len(sg);
                }
-               /* Make this an end of list */
-               mptr[-2] = direction|0xD0000000|sg_dma_len(sg-1);
                reqlen = mptr - msg;
                *lenptr = len;
                
@@ -2163,16 +2164,8 @@ static s32 adpt_scsi_to_i2o(adpt_hba* pHba, struct scsi_cmnd* cmd, struct adpt_d
                                len, cmd->underflow);
                }
        } else {
-               *lenptr = len = cmd->request_bufflen;
-               if(len == 0) {
-                       reqlen = 12;
-               } else {
-                       *mptr++ = 0xD0000000|direction|cmd->request_bufflen;
-                       *mptr++ = pci_map_single(pHba->pDev,
-                               cmd->request_buffer,
-                               cmd->request_bufflen,
-                               cmd->sc_data_direction);
-               }
+               *lenptr = len = 0;
+               reqlen = 12;
        }
        
        /* Stick the headers on */
@@ -2232,7 +2225,7 @@ static s32 adpt_i2o_to_scsi(void __iomem *reply, struct scsi_cmnd* cmd)
        hba_status = detailed_status >> 8;
 
        // calculate resid for sg 
-       cmd->resid = cmd->request_bufflen - readl(reply+5);
+       scsi_set_resid(cmd, scsi_bufflen(cmd) - readl(reply+5));
 
        pHba = (adpt_hba*) cmd->device->host->hostdata[0];