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[SCSI] remove scsi_cmnd->state

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We never look at it except for the old megaraid driver that abuses it
for sending internal commands.  That usage can be fixed easily because
those internal commands are single-threaded by a mutex and we can easily
use a completion there.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Christoph Hellwig 2005-06-19 13:42:05 +02:00 committed by James Bottomley
parent b4edcbcafd
commit 8d115f845a
6 changed files with 5 additions and 43 deletions
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26
drivers/scsi/megaraid.c
View file

@ -35,6 +35,7 @@
#include <linux/blkdev.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>
@ -4477,8 +4478,6 @@ mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc,
scb->idx = CMDID_INT_CMDS;
scmd->state = 0;
/*
* Get the lock only if the caller has not acquired it already
*/
@ -4488,15 +4487,7 @@ mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc,
if( ls == LOCK_INT ) spin_unlock_irqrestore(&adapter->lock, flags);
/*
* Wait till this command finishes. Do not use
* wait_event_interruptible(). It causes panic if CTRL-C is hit when
* dumping e.g., physical disk information through /proc interface.
*/
#if 0
wait_event_interruptible(adapter->int_waitq, scmd->state);
#endif
wait_event(adapter->int_waitq, scmd->state);
wait_for_completion(&adapter->int_waitq);
rval = scmd->result;
mc->status = scmd->result;
@ -4530,16 +4521,7 @@ mega_internal_done(Scsi_Cmnd *scmd)
adapter = (adapter_t *)scmd->device->host->hostdata;
scmd->state = 1; /* thread waiting for its command to complete */
/*
* See comment in mega_internal_command() routine for
* wait_event_interruptible()
*/
#if 0
wake_up_interruptible(&adapter->int_waitq);
#endif
wake_up(&adapter->int_waitq);
complete(&adapter->int_waitq);
}
@ -4861,7 +4843,7 @@ megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
}
init_MUTEX(&adapter->int_mtx);
init_waitqueue_head(&adapter->int_waitq);
init_completion(&adapter->int_waitq);
adapter->this_id = DEFAULT_INITIATOR_ID;
adapter->host->this_id = DEFAULT_INITIATOR_ID;

2
drivers/scsi/megaraid.h
View file

@ -891,7 +891,7 @@ typedef struct {
Scsi_Cmnd int_scmd;
struct semaphore int_mtx; /* To synchronize the internal
commands */
wait_queue_head_t int_waitq; /* wait queue for internal
struct completion int_waitq; /* wait queue for internal
cmds */
int has_cluster; /* cluster support on this HBA */

7
drivers/scsi/scsi.c
View file

@ -259,7 +259,6 @@ struct scsi_cmnd *scsi_get_command(struct scsi_device *dev, int gfp_mask)
memset(cmd, 0, sizeof(*cmd));
cmd->device = dev;
cmd->state = SCSI_STATE_UNUSED;
init_timer(&cmd->eh_timeout);
INIT_LIST_HEAD(&cmd->list);
spin_lock_irqsave(&dev->list_lock, flags);
@ -609,9 +608,6 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
* We will use a queued command if possible, otherwise we will
* emulate the queuing and calling of completion function ourselves.
*/
cmd->state = SCSI_STATE_QUEUED;
atomic_inc(&cmd->device->iorequest_cnt);
/*
@ -764,7 +760,6 @@ void __scsi_done(struct scsi_cmnd *cmd)
* Set the serial numbers back to zero
*/
cmd->serial_number = 0;
cmd->state = SCSI_STATE_BHQUEUE;
atomic_inc(&cmd->device->iodone_cnt);
if (cmd->result)
@ -885,8 +880,6 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
SCSI_LOG_MLCOMPLETE(4, printk("Notifying upper driver of completion "
"for device %d %x\n", sdev->id, cmd->result));
cmd->state = SCSI_STATE_FINISHED;
/*
* We can get here with use_sg=0, causing a panic in the upper level
*/

7
drivers/scsi/scsi_error.c
View file

@ -74,10 +74,6 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag)
spin_lock_irqsave(shost->host_lock, flags);
scsi_eh_eflags_set(scmd, eh_flag);
/*
* FIXME: Can we stop setting owner and state.
*/
scmd->state = SCSI_STATE_FAILED;
list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);
set_bit(SHOST_RECOVERY, &shost->shost_state);
shost->host_failed++;
@ -634,8 +630,6 @@ static void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
struct list_head *done_q)
{
scmd->device->host->host_failed--;
scmd->state = SCSI_STATE_BHQUEUE;
scsi_eh_eflags_clr_all(scmd);
/*
@ -1803,7 +1797,6 @@ scsi_reset_provider(struct scsi_device *dev, int flag)
scmd->request = &req;
memset(&scmd->eh_timeout, 0, sizeof(scmd->eh_timeout));
scmd->request->rq_status = RQ_SCSI_BUSY;
scmd->state = SCSI_STATE_INITIALIZING;
memset(&scmd->cmnd, '\0', sizeof(scmd->cmnd));

5
drivers/scsi/scsi_lib.c
View file

@ -145,11 +145,6 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
else if (reason == SCSI_MLQUEUE_DEVICE_BUSY)
device->device_blocked = device->max_device_blocked;
/*
* Register the fact that we own the thing for now.
*/
cmd->state = SCSI_STATE_MLQUEUE;
/*
* Decrement the counters, since these commands are no longer
* active on the host/device.

1
include/scsi/scsi_cmnd.h
View file

@ -31,7 +31,6 @@ struct scsi_cmnd {
int sc_magic;
struct scsi_device *device;
unsigned short state;
struct scsi_request *sc_request;
struct list_head list; /* scsi_cmnd participates in queue lists */