linux-kernel - [PATCH 09/15] ide-atapi: use local sense buffer

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Message-Id: <1242364293-29223-10-git-send-email-petkovbb@gmail.com>
Date:	Fri, 15 May 2009 07:11:27 +0200
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	<bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 09/15] ide-atapi: use local sense buffer

Access the sense buffer through the bio in ->pc_callback method thus
alleviating the need for the pc->buf pointer.

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
 drivers/ide/ide-atapi.c  |    4 +++-
 drivers/ide/ide-floppy.c |    3 ++-
 drivers/ide/ide-tape.c   |    5 +++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index b12be1f..66ea1e7 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -253,7 +253,9 @@ void ide_retry_pc(ide_drive_t *drive)
 	/* init pc from sense_rq */
 	ide_init_pc(pc);
 	memcpy(pc->c, sense_rq->cmd, 12);
-	pc->buf = bio_data(sense_rq->bio);	/* pointer to mapped address */
+
+	/* pointer to mapped address */
+	pc->buf = bio_data(sense_rq->bio);
 	pc->req_xfer = blk_rq_bytes(sense_rq);
 
 	if (drive->media == ide_tape)
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 060c893..14e5e9c 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -77,7 +77,8 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
 	    (rq && blk_pc_request(rq)))
 		uptodate = 1; /* FIXME */
 	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
-		u8 *buf = pc->buf;
+
+		u8 *buf = bio_data(rq->bio);
 
 		if (!pc->error) {
 			floppy->sense_key = buf[2] & 0x0F;
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 1f7f504..ef5f342 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -288,11 +288,12 @@ static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
  * called on each failed packet command retry to analyze the request sense. We
  * currently do not utilize this information.
  */
-static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
+static void idetape_analyze_error(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->failed_pc;
 	struct request *rq = drive->hwif->rq;
+	u8 *sense = bio_data(rq->bio);
 
 	tape->sense_key = sense[2] & 0xF;
 	tape->asc       = sense[12];
@@ -362,7 +363,7 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
 
 	if (pc->c[0] == REQUEST_SENSE) {
 		if (uptodate)
-			idetape_analyze_error(drive, pc->buf);
+			idetape_analyze_error(drive);
 		else
 			printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
 					"itself - Aborting request!\n");
-- 
1.6.3

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