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ide-{floppy,tape}: remove packet command stack

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* Add 'struct ide_atapi_pc queued_pc' to struct ide_{floppy,tape}_obj
  and switch ide*_do_request() to use it (there can be only one active
  request for a given device).

* Add 'struct ide_atapi_pc request_sense_pc' to struct ide_*_obj
  and switch ide*_retry_pc() to use it.

* Remove needless {floppy,tape}->pc assignment from ide*_setup().

* Remove no longer needed ide*_next_pc_storage(), pc_stack[],
  rq_stack_index, IDE*_PC_STACK and DBG_PC_STACK.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2008-10-10 22:39:36 +02:00
parent 394a4c2101
commit 2e8a6f89de
2 changed files with 13 additions and 67 deletions
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32
drivers/ide/ide-floppy.c
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@@ -75,13 +75,6 @@
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
/*
* In various places in the driver, we need to allocate storage for packet
* commands, which will remain valid while we leave the driver to wait for
* an interrupt or a timeout event.
*/
#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
@@ -104,11 +97,10 @@ typedef struct ide_floppy_obj {
struct ide_atapi_pc *pc;
/* Last failed packet command */
struct ide_atapi_pc *failed_pc;
/* Packet command stack */
struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
/* Next free packet command storage space */
int pc_stack_index;
/* used for blk_{fs,pc}_request() requests */
struct ide_atapi_pc queued_pc;
struct ide_atapi_pc request_sense_pc;
struct request request_sense_rq;
/* Last error information */
@@ -296,15 +288,6 @@ static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_do_drive_cmd(drive, rq);
}
static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
floppy->pc_stack_index = 0;
return (&floppy->pc_stack[floppy->pc_stack_index++]);
}
static void ide_floppy_callback(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
@@ -365,10 +348,9 @@ static void idefloppy_retry_pc(ide_drive_t *drive)
{
struct ide_floppy_obj *floppy = drive->driver_data;
struct request *rq = &floppy->request_sense_rq;
struct ide_atapi_pc *pc;
struct ide_atapi_pc *pc = &floppy->request_sense_pc;
(void)ide_read_error(drive);
pc = idefloppy_next_pc_storage(drive);
idefloppy_create_request_sense_cmd(pc);
idefloppy_queue_pc_head(drive, pc, rq);
}
@@ -629,12 +611,12 @@ static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
idefloppy_end_request(drive, 0, 0);
return ide_stopped;
}
pc = idefloppy_next_pc_storage(drive);
pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(floppy, pc, rq, block);
} else if (blk_special_request(rq)) {
pc = (struct ide_atapi_pc *) rq->buffer;
} else if (blk_pc_request(rq)) {
pc = idefloppy_next_pc_storage(drive);
pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq);
} else {
blk_dump_rq_flags(rq,
@@ -1010,7 +992,7 @@ static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
u8 gcw[2];
*((u16 *)&gcw) = id[ATA_ID_CONFIG];
floppy->pc = floppy->pc_stack;
drive->pc_callback = ide_floppy_callback;
if (((gcw[0] & 0x60) >> 5) == 1)