Merge Al/Jens clashes

drivers/block/ll_rw_blk.c

@@ -670,12 +670,10 @@ void blk_dump_rq_flags(struct request *rq, char *msg)
 		bit++;
 	} while (bit < __REQ_NR_BITS);
 
-	if (rq->flags & REQ_CMD)
 	printk("sector %llu, nr/cnr %lu/%u\n", (unsigned long long)rq->sector,
 						       rq->nr_sectors,
 						       rq->current_nr_sectors);
-
-	printk("\n");
+	printk("bio %p, biotail %p\n", rq->bio, rq->biotail);
 }
 
 void blk_recount_segments(request_queue_t *q, struct bio *bio)
@@ -1927,7 +1925,7 @@ inline void blk_recalc_rq_segments(struct request *rq)
 
 inline void blk_recalc_rq_sectors(struct request *rq, int nsect)
 {
-	if (rq->flags & REQ_CMD) {
+	if (rq->bio) {
 		rq->hard_sector += nsect;
 		rq->nr_sectors = rq->hard_nr_sectors -= nsect;
 		rq->sector = rq->hard_sector;
@@ -1968,20 +1966,28 @@ int end_that_request_first(struct request *req, int uptodate, int nr_sectors)
 
 	req->errors = 0;
 	if (!uptodate) {
-		printk("end_request: I/O error, dev %s, sector %llu\n",
-			kdevname(req->rq_dev), (unsigned long long)req->sector);
 		error = -EIO;
+		if (!(req->flags & REQ_QUIET))
+			printk("end_request: I/O error, dev %s, sector %llu\n",
+				kdevname(req->rq_dev),
+				(unsigned long long)req->sector);
 	}
 
 	while ((bio = req->bio)) {
-		const int nsect = bio_iovec(bio)->bv_len >> 9;
-		int new_bio = 0;
+		int new_bio = 0, nsect;
+
+		if (unlikely(bio->bi_idx >= bio->bi_vcnt)) {
+			printk("%s: bio idx %d >= vcnt %d\n", __FUNCTION__,
+						bio->bi_idx, bio->bi_vcnt);
+			break;
+		}
 
 		BIO_BUG_ON(bio_iovec(bio)->bv_len > bio->bi_size);
 
 		/*
 		 * not a complete bvec done
 		 */
+		nsect = bio_iovec(bio)->bv_len >> 9;
 		if (unlikely(nsect > nr_sectors)) {
 			int partial = nr_sectors << 9;
 

drivers/cdrom/cdrom.c

@@ -267,6 +267,7 @@
 #include <linux/blkpg.h>
 #include <linux/init.h>
 #include <linux/fcntl.h>
+#include <linux/blkdev.h>
 
 #include <asm/uaccess.h>
 
@@ -1436,6 +1437,11 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct inode *ip,
 	struct cdrom_device_ops *cdo = cdi->ops;
 	int ret;
 
+	/* Try the generic SCSI command ioctl's first.. */
+	ret = scsi_cmd_ioctl(ip->i_bdev, cmd, arg);
+	if (ret != -ENOTTY)
+		return ret;
+
 	/* the first few commands do not deal with audio drive_info, but
 	   only with routines in cdrom device operations. */
 	switch (cmd) {

drivers/ide/ide-cd.c

@@ -3026,14 +3026,7 @@ int ide_cdrom_ioctl (ide_drive_t *drive,
 		     unsigned int cmd, unsigned long arg)
 {
 	struct cdrom_info *info = drive->driver_data;
-	int error;
-
-	/* Try the generic SCSI command ioctl's first.. */
-	error = scsi_cmd_ioctl(inode->i_bdev, cmd, arg);
-	if (error != -ENOTTY)
-		return error;
 
-	/* Then the generic cdrom ioctl's.. */
 	return cdrom_ioctl(&info->devinfo, inode, cmd, arg);
 }
 

drivers/scsi/scsi_lib.c

@@ -857,7 +857,7 @@ void scsi_request_fn(request_queue_t * q)
 				scsi_init_cmd_from_req(SCpnt, SRpnt);
 			}
 
-		} else if (req->flags & REQ_CMD) {
+		} else if (req->flags & (REQ_CMD | REQ_BLOCK_PC)) {
 			SRpnt = NULL;
 			STpnt = scsi_get_request_dev(req);
 			if (!STpnt) {
@@ -919,7 +919,7 @@ void scsi_request_fn(request_queue_t * q)
 		req = NULL;
 		spin_unlock_irq(q->queue_lock);
 
-		if (SCpnt->request->flags & REQ_CMD) {
+		if (SCpnt->request->flags & (REQ_CMD | REQ_BLOCK_PC)) {
 			/*
 			 * This will do a couple of things:
 			 *  1) Fill in the actual SCSI command.

drivers/scsi/scsi_merge.c

@@ -62,16 +62,28 @@ int scsi_init_io(Scsi_Cmnd *SCpnt)
 	int count, gfp_mask;
 
 	/*
-	 * First we need to know how many scatter gather segments are needed.
+	 * non-sg block request. FIXME: check bouncing for isa hosts!
 	 */
-	count = req->nr_phys_segments;
+	if ((req->flags & REQ_BLOCK_PC) && !req->bio) {
+		/*
+		 * FIXME: isa bouncing
+		 */
+		if (SCpnt->host->unchecked_isa_dma)
+			goto fail;
+
+		SCpnt->request_bufflen = req->data_len;
+		SCpnt->request_buffer = req->data;
+		req->buffer = req->data;
+		SCpnt->use_sg = 0;
+		return 1;
+	}
 
 	/*
 	 * we used to not use scatter-gather for single segment request,
 	 * but now we do (it makes highmem I/O easier to support without
 	 * kmapping pages)
 	 */
-	SCpnt->use_sg = count;
+	SCpnt->use_sg = req->nr_phys_segments;
 
 	gfp_mask = GFP_NOIO;
 	if (in_interrupt()) {
@@ -111,6 +123,7 @@ int scsi_init_io(Scsi_Cmnd *SCpnt)
 	/*
 	 * kill it. there should be no leftover blocks in this request
 	 */
+fail:
 	SCpnt = scsi_end_request(SCpnt, 0, req->nr_sectors);
 	BUG_ON(SCpnt);
 	return 0;

drivers/scsi/sd.c

@@ -191,6 +191,7 @@ static int sd_ioctl(struct inode * inode, struct file * filp,
 	Scsi_Device *sdp = sdkp->device;
 	struct Scsi_Host *host;
 	int diskinfo[4];
+	int error;
     
 	SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n",
 						disk->disk_name, cmd));
@@ -206,6 +207,10 @@ static int sd_ioctl(struct inode * inode, struct file * filp,
 	if( !scsi_block_when_processing_errors(sdp) )
 		return -ENODEV;
 
+	error = scsi_cmd_ioctl(inode->i_bdev, cmd, arg);
+	if (error != -ENOTTY)
+		return error;
+
 	switch (cmd) 
 	{
 		case HDIO_GETGEO:   /* Return BIOS disk parameters */
@@ -273,12 +278,41 @@ static struct gendisk **sd_disks;
  **/
 static int sd_init_command(Scsi_Cmnd * SCpnt)
 {
-	int this_count;
+	int this_count, timeout;
 	struct gendisk *disk;
 	sector_t block;
-	Scsi_Device *sdp;
+	Scsi_Device *sdp = SCpnt->device;
+
+	timeout = SD_TIMEOUT;
+	if (SCpnt->device->type != TYPE_DISK)
+		timeout = SD_MOD_TIMEOUT;
+
+	/*
+	 * these are already setup, just copy cdb basically
+	 */
+	if (SCpnt->request->flags & REQ_BLOCK_PC) {
+		struct request *rq = SCpnt->request;
+
+		if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
+			return 0;
+
+		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+		if (rq_data_dir(rq) == WRITE)
+			SCpnt->sc_data_direction = SCSI_DATA_WRITE;
+		else if (rq->data_len)
+			SCpnt->sc_data_direction = SCSI_DATA_READ;
+		else
+			SCpnt->sc_data_direction = SCSI_DATA_NONE;
+
+		this_count = rq->data_len;
+		if (rq->timeout)
+			timeout = rq->timeout;
+
+		goto queue;
+	}
+
 	/*
-	 * don't support specials for nwo
+	 * we only do REQ_CMD and REQ_BLOCK_PC
 	 */
 	if (!(SCpnt->request->flags & REQ_CMD))
 		return 0;
@@ -290,7 +324,6 @@ static int sd_init_command(Scsi_Cmnd * SCpnt)
 	SCSI_LOG_HLQUEUE(1, printk("sd_command_init: disk=%s, block=%llu, "
 			    "count=%d\n", disk->disk_name, (unsigned long long)block, this_count));
 
-	sdp = SCpnt->device;
 	if (!sdp || !sdp->online ||
  	    block + SCpnt->request->nr_sectors > get_capacity(disk)) {
 		SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectors\n", 
@@ -398,12 +431,12 @@ static int sd_init_command(Scsi_Cmnd * SCpnt)
 	 * host adapter, it's safe to assume that we can at least transfer
 	 * this many bytes between each connect / disconnect.
 	 */
+queue:
 	SCpnt->transfersize = sdp->sector_size;
 	SCpnt->underflow = this_count << 9;
 
 	SCpnt->allowed = MAX_RETRIES;
-	SCpnt->timeout_per_command = (SCpnt->device->type == TYPE_DISK ?
-				      SD_TIMEOUT : SD_MOD_TIMEOUT);
+	SCpnt->timeout_per_command = timeout;
 
 	/*
 	 * This is the completion routine we use.  This is matched in terms

drivers/scsi/sr.c

@@ -247,7 +247,7 @@ static void rw_intr(Scsi_Cmnd * SCpnt)
 
 static int sr_init_command(Scsi_Cmnd * SCpnt)
 {
-	int block=0, this_count, s_size;
+	int block=0, this_count, s_size, timeout = SR_TIMEOUT;
 	Scsi_CD *cd = SCpnt->request->rq_disk->private_data;
 
 	SCSI_LOG_HLQUEUE(1, printk("Doing sr request, dev = %s, block = %d\n", disk->disk_name, block));
@@ -266,6 +266,30 @@ static int sr_init_command(Scsi_Cmnd * SCpnt)
 		return 0;
 	}
 
+	/*
+	 * these are already setup, just copy cdb basically
+	 */
+	if (SCpnt->request->flags & REQ_BLOCK_PC) {
+		struct request *rq = SCpnt->request;
+
+		if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
+			return 0;
+
+		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+		if (rq_data_dir(rq) == WRITE)
+			SCpnt->sc_data_direction = SCSI_DATA_WRITE;
+		else if (rq->data_len)
+			SCpnt->sc_data_direction = SCSI_DATA_READ;
+		else
+			SCpnt->sc_data_direction = SCSI_DATA_NONE;
+
+		this_count = rq->data_len;
+		if (rq->timeout)
+			timeout = rq->timeout;
+
+		goto queue;
+	}
+
 	if (!(SCpnt->request->flags & REQ_CMD)) {
 		blk_dump_rq_flags(SCpnt->request, "sr unsup command");
 		return 0;
@@ -336,11 +360,12 @@ static int sr_init_command(Scsi_Cmnd * SCpnt)
 	 * host adapter, it's safe to assume that we can at least transfer
 	 * this many bytes between each connect / disconnect.
 	 */
+queue:
 	SCpnt->transfersize = cd->device->sector_size;
 	SCpnt->underflow = this_count << 9;
 
 	SCpnt->allowed = MAX_RETRIES;
-	SCpnt->timeout_per_command = SR_TIMEOUT;
+	SCpnt->timeout_per_command = timeout;
 
 	/*
 	 * This is the completion routine we use.  This is matched in terms

include/linux/blkdev.h

@@ -235,6 +235,7 @@ struct request_queue
 #define blk_queue_tagged(q)	test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags)
 #define blk_queue_empty(q)	elv_queue_empty(q)
 #define blk_fs_request(rq)	((rq)->flags & REQ_CMD)
+#define blk_pc_request(rq)	((rq)->flags & REQ_BLOCK_PC)
 #define list_entry_rq(ptr)	list_entry((ptr), struct request, queuelist)
 
 #define rq_data_dir(rq)		((rq)->flags & 1)