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Date: Thu, 12 Jun 2008 08:41:10 +0200
From: Borislav Petkov <petkovbb@...glemail.com>
To: <bzolnier@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
Borislav Petkov <petkovbb@...il.com>
Subject: [PATCH 18/18] ide: use flags in IRQ handler
Pass pc->flags to the IRQ handler from the drivers (ide-tape/floppy/scsi) thus
making it more pc-unaware.
There should be no functionality change resulting from this.
Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
drivers/ide/ide-atapi.c | 25 +++++++++++++------------
drivers/ide/ide-floppy.c | 3 ++-
drivers/ide/ide-tape.c | 3 ++-
drivers/scsi/ide-scsi.c | 2 +-
include/linux/ide.h | 2 +-
5 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 3a6ae79..dfe1c55 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -19,7 +19,8 @@ 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,
void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
- void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int))
+ void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int),
+ unsigned long *flags)
{
ide_hwif_t *hwif = drive->hwif;
xfer_func_t *xferfunc;
@@ -35,7 +36,7 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
debug_log("Enter %s - interrupt handler\n", __func__);
- if (pc->flags & PC_FLAG_TIMEDOUT) {
+ if (*flags & PC_FLAG_TIMEDOUT) {
pc->callback(drive);
return ide_stopped;
}
@@ -43,14 +44,14 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
/* Clear the interrupt */
stat = ide_read_status(drive);
- if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+ if (*flags & PC_FLAG_DMA_IN_PROGRESS) {
if (hwif->dma_ops->dma_end(drive) ||
(drive->media == ide_tape && !scsi && (stat & ERR_STAT))) {
if (drive->media == ide_floppy && !scsi)
printk(KERN_ERR "%s: DMA %s error\n",
drive->name, rq_data_dir(pc->rq)
? "write" : "read");
- pc->flags |= PC_FLAG_DMA_ERROR;
+ *flags |= PC_FLAG_DMA_ERROR;
} else {
pc->xferred = pc->req_xfer;
if (update_buffers)
@@ -64,14 +65,14 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
debug_log("Packet command completed, %d bytes transferred\n",
pc->xferred);
- pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
+ *flags &= ~PC_FLAG_DMA_IN_PROGRESS;
local_irq_enable_in_hardirq();
if (drive->media == ide_tape && !scsi &&
(stat & ERR_STAT) && cmd[0] == REQUEST_SENSE)
stat &= ~ERR_STAT;
- if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
+ if ((stat & ERR_STAT) || (*flags & PC_FLAG_DMA_ERROR)) {
/* Error detected */
debug_log("%s: I/O error\n", drive->name);
@@ -96,7 +97,7 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
}
cmd_finished:
pc->error = 0;
- if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) &&
+ if ((*flags & PC_FLAG_WAIT_FOR_DSC) &&
(stat & SEEK_STAT) == 0) {
dsc_handle(drive);
return ide_stopped;
@@ -106,8 +107,8 @@ cmd_finished:
return ide_stopped;
}
- if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
- pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
+ if (*flags & PC_FLAG_DMA_IN_PROGRESS) {
+ *flags &= ~PC_FLAG_DMA_IN_PROGRESS;
printk(KERN_ERR "%s: The device wants to issue more interrupts "
"in DMA mode\n", drive->name);
ide_dma_off(drive);
@@ -123,7 +124,7 @@ cmd_finished:
printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
return ide_do_reset(drive);
}
- if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
+ if (((ireason & IO) == IO) == !!(*flags & PC_FLAG_WRITING)) {
/* Hopefully, we will never get here */
printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
"to %s!\n", drive->name,
@@ -131,7 +132,7 @@ cmd_finished:
(ireason & IO) ? "Read" : "Write");
return ide_do_reset(drive);
}
- if (!(pc->flags & PC_FLAG_WRITING)) {
+ if (!(*flags & PC_FLAG_WRITING)) {
/* Reading - Check that we have enough space */
temp = pc->xferred + bcount;
if (temp > pc->req_xfer) {
@@ -172,7 +173,7 @@ cmd_finished:
if ((drive->media == ide_floppy && !scsi && !pc->buf) ||
(drive->media == ide_tape && !scsi && pc->bh) ||
(scsi && pc->sg))
- io_buffers(drive, pc, bcount, !!(pc->flags & PC_FLAG_WRITING));
+ io_buffers(drive, pc, bcount, !!(*flags & PC_FLAG_WRITING));
else
xferfunc(drive, NULL, pc->cur_pos, bcount);
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 8bdef60..d3fcb51 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -395,7 +395,8 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
- idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
+ idefloppy_retry_pc, NULL, ide_floppy_io_buffers,
+ &floppy->pc->flags);
}
/*
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 6e1233b..0c24426 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -802,7 +802,8 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
return ide_pc_intr(drive, tape->pc, idetape_pc_intr, IDETAPE_WAIT_CMD,
NULL, idetape_update_buffers, idetape_retry_pc,
- ide_tape_handle_dsc, ide_tape_io_buffers);
+ ide_tape_handle_dsc, ide_tape_io_buffers,
+ &tape->pc->flags);
}
/*
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 683bce3..ef9e693 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -360,7 +360,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc),
idescsi_expiry, NULL, NULL, NULL,
- ide_scsi_io_buffers);
+ ide_scsi_io_buffers, &pc->flags);
}
static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index df47a5e..09d95c7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -946,7 +946,7 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
- int));
+ int), unsigned long *);
ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
ide_handler_t *, unsigned int, ide_expiry_t *);
ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
--
1.5.5.1
--
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