linux-kernel - [PATCH 38/40] ide-scsi: add more debugging to idescsi_pc

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Message-Id: <20080518190010.5636.62709.sendpatchset@localhost.localdomain>
Date:	Sun, 18 May 2008 21:00:10 +0200
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 38/40] ide-scsi: add more debugging to idescsi_pc_intr()

Add more debugging to idescsi_pc_intr() to match ide-tape's
idetape_pc_intr().

While at it:

* Correct the first debug message.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/scsi/ide-scsi.c |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

Index: b/drivers/scsi/ide-scsi.c
===================================================================
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -364,7 +364,7 @@ static ide_startstop_t idescsi_pc_intr (
 	u16 bcount;
 	u8 stat, ireason;
 
-	debug_log("Reached %s interrupt handler\n", __func__);
+	debug_log("Enter %s - interrupt handler\n", __func__);
 
 	if (pc->flags & PC_FLAG_TIMEDOUT) {
 		pc->callback(drive);
@@ -383,10 +383,16 @@ static ide_startstop_t idescsi_pc_intr (
 
 	if ((stat & DRQ_STAT) == 0) {
 		/* No more interrupts */
+		debug_log("Packet command completed, %d bytes transferred\n",
+			  pc->xferred);
 		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 		local_irq_enable_in_hardirq();
-		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR))
+		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
+			/* Error detected */
+			debug_log("%s: I/O error\n", drive->name);
+
 			rq->errors++;
+		}
 		pc->callback(drive);
 		return ide_stopped;
 	}
@@ -457,6 +463,9 @@ static ide_startstop_t idescsi_pc_intr (
 	pc->xferred += bcount;
 	pc->cur_pos += bcount;
 
+	debug_log("[cmd %x] transferred %d bytes on that intr.\n",
+		  pc->c[0], bcount);
+
 	/* And set the interrupt handler again */
 	ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
 	return ide_started;
--
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