From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: remove ide_execute_pkt_cmd() (v2)
* Pass command structure to ide_execute_command() and skip
__ide_set_handler() for ATAPI protocols on non-DRQ devices.
* Convert ide_issue_pc() to always use ide_execute_command()
and remove no longer needed ide_execute_pkt_cmd().
v2:
* Fix for non-DRQ devices (based on report from Borislav).
There should be no functional changes caused by this patch.
Acked-by: Borislav Petkov <petkovbb@xxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
replacement patch for the one in pata-2.6 tree
drivers/ide/ide-atapi.c | 15 +++++++--------
drivers/ide/ide-iops.c | 25 ++++++++-----------------
drivers/ide/ide-taskfile.c | 6 ++----
include/linux/ide.h | 5 ++---
4 files changed, 19 insertions(+), 32 deletions(-)
Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -481,6 +481,7 @@ static void ide_init_packet_cmd(struct i
cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO;
cmd->tf_flags |= IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM |
IDE_TFLAG_OUT_FEATURE | tf_flags;
+ cmd->tf.command = ATA_CMD_PACKET;
cmd->tf.feature = dma; /* Use PIO/DMA */
cmd->tf.lbam = bcount & 0xff;
cmd->tf.lbah = (bcount >> 8) & 0xff;
@@ -626,6 +627,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t
unsigned int timeout;
u32 tf_flags;
u16 bcount;
+ u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT);
if (dev_is_idecd(drive)) {
tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
@@ -675,17 +677,14 @@ ide_startstop_t ide_issue_pc(ide_drive_t
(void)do_rw_taskfile(drive, cmd);
- /* Issue the packet command */
- if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ if (drq_int) {
if (drive->dma)
drive->waiting_for_dma = 0;
hwif->expiry = expiry;
- ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
- timeout);
- return ide_started;
- } else {
- ide_execute_pkt_cmd(drive);
- return ide_transfer_pc(drive);
}
+
+ ide_execute_command(drive, cmd, ide_transfer_pc, timeout);
+
+ return drq_int ? ide_started : ide_transfer_pc(drive);
}
EXPORT_SYMBOL_GPL(ide_issue_pc);
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -451,7 +451,7 @@ EXPORT_SYMBOL(ide_set_handler);
/**
* ide_execute_command - execute an IDE command
* @drive: IDE drive to issue the command against
- * @command: command byte to write
+ * @cmd: command
* @handler: handler for next phase
* @timeout: timeout for command
*
@@ -461,15 +461,18 @@ EXPORT_SYMBOL(ide_set_handler);
* should go via this function or do equivalent locking.
*/
-void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
- unsigned timeout)
+void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
+ ide_handler_t *handler, unsigned timeout)
{
ide_hwif_t *hwif = drive->hwif;
unsigned long flags;
spin_lock_irqsave(&hwif->lock, flags);
- __ide_set_handler(drive, handler, timeout);
- hwif->tp_ops->exec_command(hwif, cmd);
+ if ((cmd->protocol != ATAPI_PROT_DMA &&
+ cmd->protocol != ATAPI_PROT_PIO) ||
+ (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
+ __ide_set_handler(drive, handler, timeout);
+ hwif->tp_ops->exec_command(hwif, cmd->tf.command);
/*
* Drive takes 400nS to respond, we must avoid the IRQ being
* serviced before that.
@@ -480,18 +483,6 @@ void ide_execute_command(ide_drive_t *dr
spin_unlock_irqrestore(&hwif->lock, flags);
}
-void ide_execute_pkt_cmd(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- unsigned long flags;
-
- spin_lock_irqsave(&hwif->lock, flags);
- hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
- ndelay(400);
- spin_unlock_irqrestore(&hwif->lock, flags);
-}
-EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
-
/*
* ide_wait_not_busy() waits for the currently selected device on the hwif
* to report a non-busy status, see comments in ide_probe_port().
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -97,8 +97,7 @@ ide_startstop_t do_rw_taskfile(ide_drive
case ATA_PROT_NODATA:
if (handler == NULL)
handler = task_no_data_intr;
- ide_execute_command(drive, tf->command, handler,
- WAIT_WORSTCASE);
+ ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
return ide_started;
case ATA_PROT_DMA:
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
@@ -106,8 +105,7 @@ ide_startstop_t do_rw_taskfile(ide_drive
dma_ops->dma_setup(drive, cmd))
return ide_stopped;
hwif->expiry = dma_ops->dma_timer_expiry;
- ide_execute_command(drive, tf->command, ide_dma_intr,
- 2 * WAIT_CMD);
+ ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
dma_ops->dma_start(drive);
default:
return ide_started;
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1135,9 +1135,8 @@ void ide_kill_rq(ide_drive_t *, struct r
void __ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);
void ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);
-void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int);
-
-void ide_execute_pkt_cmd(ide_drive_t *);
+void ide_execute_command(ide_drive_t *, struct ide_cmd *, ide_handler_t *,
+ unsigned int);
void ide_pad_transfer(ide_drive_t *, int, int);
--
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