bsg: support for full generic block layer SG v3

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 16 insertions, 13 deletions

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index f429be88c4f9..a21f585b1caa 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -1258,19 +1258,25 @@ static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t
         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
 }
 
-static int
+static void
 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
 {
-        /*
-         * just support eject for now, it would not be hard to make the
-         * REQ_BLOCK_PC support fully-featured
-         */
-        if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
-                return 1;
-
         idefloppy_init_pc(pc);
+        pc->callback = &idefloppy_rw_callback;
         memcpy(pc->c, rq->cmd, sizeof(pc->c));
-        return 0;
+        pc->rq = rq;
+        pc->b_count = rq->data_len;
+        if (rq->data_len && rq_data_dir(rq) == WRITE)
+                set_bit(PC_WRITING, &pc->flags);
+        pc->buffer = rq->data;
+        if (rq->bio)
+                set_bit(PC_DMA_RECOMMENDED, &pc->flags);
+                
+        /*
+         * possibly problematic, doesn't look like ide-floppy correctly
+         * handled scattered requests if dma fails...
+         */
+        pc->request_transfer = pc->buffer_size = rq->data_len;
 }
 
 /*
@@ -1317,10 +1323,7 @@ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request
                 pc = (idefloppy_pc_t *) rq->buffer;
         } else if (blk_pc_request(rq)) {
                 pc = idefloppy_next_pc_storage(drive);
-                if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
-                        idefloppy_do_end_request(drive, 0, 0);
-                        return ide_stopped;
-                }
+                idefloppy_blockpc_cmd(floppy, pc, rq);
         } else {
                 blk_dump_rq_flags(rq,
                         "ide-floppy: unsupported command in queue");