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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-11 00:39:37 +0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-11 00:39:37 +0400
commit7645c1514c7d34ebdf3ea0e8ee3a935c08abceb2 (patch)
tree98e51341f3f1a259ca89baf7d2e83b7357dc8a22 /drivers/ide/ide-atapi.c
parent7bf7420a318978cd6042e5a5da34b7cfa18ae559 (diff)
downloadlinux-7645c1514c7d34ebdf3ea0e8ee3a935c08abceb2.tar.xz
ide: add ide_queue_pc_head() helper
* Move REQ_IDETAPE_* enums to <linux/ide.h>. * Add ide_queue_pc_head() and convert ide-{floppy,tape}.c to use it instead of ide*_queue_pc_head(). * Remove no longer used ide*_queue_pc_head(). There should be no functional changes caused by this patch. Acked-by: Borislav Petkov <petkovbb@gmail.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-atapi.c')
-rw-r--r--drivers/ide/ide-atapi.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 8f0842ce77f5..da71bfce92e8 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -119,6 +119,26 @@ void ide_init_pc(struct ide_atapi_pc *pc)
}
EXPORT_SYMBOL_GPL(ide_init_pc);
+/*
+ * Generate a new packet command request in front of the request queue, before
+ * the current request, so that it will be processed immediately, on the next
+ * pass through the driver.
+ */
+void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
+ struct ide_atapi_pc *pc, struct request *rq)
+{
+ blk_rq_init(NULL, rq);
+ rq->cmd_type = REQ_TYPE_SPECIAL;
+ rq->cmd_flags |= REQ_PREEMPT;
+ rq->buffer = (char *)pc;
+ rq->rq_disk = disk;
+ memcpy(rq->cmd, pc->c, 12);
+ if (drive->media == ide_tape)
+ rq->cmd[13] = REQ_IDETAPE_PC1;
+ ide_do_drive_cmd(drive, rq);
+}
+EXPORT_SYMBOL_GPL(ide_queue_pc_head);
+
/* TODO: unify the code thus making some arguments go away */
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,