linux-kernel - [PATCH 20/20] ide-cd: unify transfer padding in cdrom_newpc

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Date:	Mon, 16 Feb 2009 01:15:21 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	Borislav Petkov <petkovbb@...il.com>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 20/20] ide-cd: unify transfer padding in cdrom_newpc_intr()

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] ide-cd: unify transfer padding in cdrom_newpc_intr()

* 'thislen' is always <= cmd->nleft for non-fs requests so the transfer
  padding inside the 'while (thislen > 0)' loop can happen only for fs
  requests -- then move it out of the loop and unify with the transfer
  padding for non-fs requests ('thislen' == 'len' for fs requests).

* blk_dump_rq_flags() dumps all request flags so it is enough to pass
  only the function name to it.

* Update my Copyrights while at it.

Cc: Borislav Petkov <petkovbb@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/ide-cd.c |   29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -4,7 +4,7 @@
  * Copyright (C) 1994-1996   Scott Snyder <snyder@...ld0.fnal.gov>
  * Copyright (C) 1996-1998   Erik Andersen <andersee@...ian.org>
  * Copyright (C) 1998-2000   Jens Axboe <axboe@...e.de>
- * Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
+ * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
  *
  * May be copied or modified under the terms of the GNU General Public
  * License.  See linux/COPYING for more information.
@@ -703,22 +703,8 @@ static ide_startstop_t cdrom_newpc_intr(
 	while (thislen > 0) {
 		int blen = min_t(int, thislen, cmd->nleft);
 
-		if (cmd->nleft == 0) {
-			if (blk_fs_request(rq) && !write)
-				/*
-				 * If the buffers are full, pipe the rest into
-				 * oblivion.
-				 */
-				ide_pad_transfer(drive, 0, thislen);
-			else {
-				printk(KERN_ERR PFX "%s: confused, missing data\n",
-						drive->name);
-				blk_dump_rq_flags(rq, rq_data_dir(rq)
-						  ? "cdrom_newpc_intr, write"
-						  : "cdrom_newpc_intr, read");
-			}
+		if (cmd->nleft == 0)
 			break;
-		}
 
 		ide_pio_bytes(drive, cmd, write, blen);
 		cmd->last_xfer_len += blen;
@@ -731,8 +717,15 @@ static ide_startstop_t cdrom_newpc_intr(
 	}
 
 	/* pad, if necessary */
-	if (!blk_fs_request(rq) && len > 0)
-		ide_pad_transfer(drive, write, len);
+	if (len > 0) {
+		if (blk_fs_request(rq) == 0 || write == 0)
+			ide_pad_transfer(drive, write, len);
+		else {
+			printk(KERN_ERR PFX "%s: confused, missing data\n",
+				drive->name);
+			blk_dump_rq_flags(rq, "cdrom_newpc_intr");
+		}
+	}
 
 	if (blk_pc_request(rq)) {
 		timeout = rq->timeout;
--
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