scsi_debug: support sg chaining

[linux-2.6-omap-h63xx.git] / drivers / scsi / scsi_debug.c

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 3e2930b7ee2397bef4207dbf545a75667907893c..72ee4c9cfb1ac0329fa8d413b5559dac46ee4a26 100644 (file)
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -36,9 +36,9 @@
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
 #include <linux/vmalloc.h>
 #include <linux/moduleparam.h>
+#include <linux/scatterlist.h>
 
 #include <linux/blkdev.h>
 #include "scsi.h"
@@ -601,7 +601,7 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
        int k, req_len, act_len, len, active;
        void * kaddr;
        void * kaddr_off;
-       struct scatterlist * sgpnt;
+       struct scatterlist * sg;
 
        if (0 == scp->request_bufflen)
                return 0;
@@ -620,16 +620,16 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
                        scp->resid = req_len - act_len;
                return 0;
        }
-       sgpnt = (struct scatterlist *)scp->request_buffer;
        active = 1;
-       for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) {
+       req_len = act_len = 0;
+       scsi_for_each_sg(scp, sg, scp->use_sg, k) {
                if (active) {
                        kaddr = (unsigned char *)
-                               kmap_atomic(sgpnt->page, KM_USER0);
+                               kmap_atomic(sg->page, KM_USER0);
                        if (NULL == kaddr)
                                return (DID_ERROR << 16);
-                       kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
-                       len = sgpnt->length;
+                       kaddr_off = (unsigned char *)kaddr + sg->offset;
+                       len = sg->length;
                        if ((req_len + len) > arr_len) {
                                active = 0;
                                len = arr_len - req_len;
@@ -638,7 +638,7 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
                        kunmap_atomic(kaddr, KM_USER0);
                        act_len += len;
                }
-               req_len += sgpnt->length;
+               req_len += sg->length;
        }
        if (scp->resid)
                scp->resid -= act_len;
@@ -654,7 +654,7 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
        int k, req_len, len, fin;
        void * kaddr;
        void * kaddr_off;
-       struct scatterlist * sgpnt;
+       struct scatterlist * sg;
 
        if (0 == scp->request_bufflen)
                return 0;
@@ -669,13 +669,14 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
                memcpy(arr, scp->request_buffer, len);
                return len;
        }
-       sgpnt = (struct scatterlist *)scp->request_buffer;
-       for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) {
-               kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0);
+       sg = scsi_sglist(scp);
+       req_len = fin = 0;
+       for (k = 0; k < scp->use_sg; ++k, sg = sg_next(sg)) {
+               kaddr = (unsigned char *)kmap_atomic(sg->page, KM_USER0);
                if (NULL == kaddr)
                        return -1;
-               kaddr_off = (unsigned char *)kaddr + sgpnt->offset;
-               len = sgpnt->length;
+               kaddr_off = (unsigned char *)kaddr + sg->offset;
+               len = sg->length;
                if ((req_len + len) > max_arr_len) {
                        len = max_arr_len - req_len;
                        fin = 1;
@@ -684,7 +685,7 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr,
                kunmap_atomic(kaddr, KM_USER0);
                if (fin)
                        return req_len + len;
-               req_len += sgpnt->length;
+               req_len += sg->length;
        }
        return req_len;
 }
@@ -2406,7 +2407,7 @@ MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
 MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
 MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
-MODULE_PARM_DESC(every_nth, "timeout every nth command(def=100)");
+MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
@@ -2876,7 +2877,7 @@ static int __init scsi_debug_init(void)
 
        init_all_queued();
 
-       sdebug_driver_template.proc_name = (char *)sdebug_proc_name;
+       sdebug_driver_template.proc_name = sdebug_proc_name;
 
        host_to_add = scsi_debug_add_host;
         scsi_debug_add_host = 0;