Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

[linux-2.6] / drivers / scsi / sg.c

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 78ac48df4de8fee6d9978fdd8f15475b56f74632..aba28f335b88ffd677764a4aeaade2d91e95137a 100644 (file)
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -48,6 +48,7 @@ static int sg_version_num = 30534;    /* 2 digits for each component */
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <linux/scatterlist.h>
+#include <linux/blktrace_api.h>
 
 #include "scsi.h"
 #include <scsi/scsi_dbg.h>
@@ -1067,6 +1068,17 @@ sg_ioctl(struct inode *inode, struct file *filp,
        case BLKSECTGET:
                return put_user(sdp->device->request_queue->max_sectors * 512,
                                ip);
+       case BLKTRACESETUP:
+               return blk_trace_setup(sdp->device->request_queue,
+                                      sdp->disk->disk_name,
+                                      sdp->device->sdev_gendev.devt,
+                                      (char *)arg);
+       case BLKTRACESTART:
+               return blk_trace_startstop(sdp->device->request_queue, 1);
+       case BLKTRACESTOP:
+               return blk_trace_startstop(sdp->device->request_queue, 0);
+       case BLKTRACETEARDOWN:
+               return blk_trace_remove(sdp->device->request_queue);
        default:
                if (read_only)
                        return -EPERM;  /* don't know so take safe approach */
@@ -2529,7 +2541,7 @@ sg_idr_max_id(int id, void *p, void *data)
 static int
 sg_last_dev(void)
 {
-       int k = 0;
+       int k = -1;
        unsigned long iflags;
 
        read_lock_irqsave(&sg_index_lock, iflags);