diff options
| -rw-r--r-- | drivers/ide/ide-floppy.c | 32 | ||||
| -rw-r--r-- | drivers/ide/ide-tape.c | 48 |
2 files changed, 13 insertions, 67 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c index 41bb61037da..58cd6e6c687 100644 --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -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) diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index dd3533505e3..ba05e03f482 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -56,8 +56,6 @@ enum { DBG_CHRDEV = (1 << 2), /* all remaining procedures */ DBG_PROCS = (1 << 3), - /* buffer alloc info (pc_stack) */ - DBG_PC_STACK = (1 << 4), }; /* define to see debug info */ @@ -89,13 +87,6 @@ enum { #define IDETAPE_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 IDETAPE_PC_STACK (10 + IDETAPE_MAX_PC_RETRIES) - -/* * Some drives (for example, Seagate STT3401A Travan) require a very long * timeout, because they don't return an interrupt or clear their busy bit * until after the command completes (even retension commands). @@ -208,13 +199,6 @@ typedef struct ide_tape_obj { struct kref kref; /* - * Since a typical character device operation requires more - * than one packet command, we provide here enough memory - * for the maximum of interconnected packet commands. - * The packet commands are stored in the circular array pc_stack. - * pc_stack_index points to the last used entry, and warps around - * to the start when we get to the last array entry. - * * pc points to the current processed packet command. * * failed_pc points to the last failed packet command, or contains @@ -226,11 +210,10 @@ typedef struct ide_tape_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[IDETAPE_PC_STACK]; - /* Next free packet command storage space */ - int pc_stack_index; + /* used by REQ_IDETAPE_{READ,WRITE} requests */ + struct ide_atapi_pc queued_pc; + struct ide_atapi_pc request_sense_pc; struct request request_sense_rq; /* @@ -452,23 +435,6 @@ static void idetape_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc) } /* - * idetape_next_pc_storage returns a pointer to a place in which we can - * safely store a packet command, even though we intend to leave the - * driver. A storage space for a maximum of IDETAPE_PC_STACK packet - * commands is allocated at initialization time. - */ -static struct ide_atapi_pc *idetape_next_pc_storage(ide_drive_t *drive) -{ - idetape_tape_t *tape = drive->driver_data; - - debug_log(DBG_PC_STACK, "pc_stack_index=%d\n", tape->pc_stack_index); - - if (tape->pc_stack_index == IDETAPE_PC_STACK) - tape->pc_stack_index = 0; - return (&tape->pc_stack[tape->pc_stack_index++]); -} - -/* * called on each failed packet command retry to analyze the request sense. We * currently do not utilize this information. */ @@ -693,10 +659,9 @@ static void idetape_retry_pc(ide_drive_t *drive) { struct ide_tape_obj *tape = drive->driver_data; struct request *rq = &tape->request_sense_rq; - struct ide_atapi_pc *pc; + struct ide_atapi_pc *pc = &tape->request_sense_pc; (void)ide_read_error(drive); - pc = idetape_next_pc_storage(drive); idetape_create_request_sense_cmd(pc); set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); idetape_queue_pc_head(drive, pc, rq); @@ -1006,12 +971,12 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive, return ide_stopped; } if (rq->cmd[13] & REQ_IDETAPE_READ) { - pc = idetape_next_pc_storage(drive); + pc = &tape->queued_pc; ide_tape_create_rw_cmd(tape, pc, rq, READ_6); goto out; } if (rq->cmd[13] & REQ_IDETAPE_WRITE) { - pc = idetape_next_pc_storage(drive); + pc = &tape->queued_pc; ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6); goto out; } @@ -2412,7 +2377,6 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor) tape->name[1] = 't'; tape->name[2] = '0' + minor; tape->chrdev_dir = IDETAPE_DIR_NONE; - tape->pc = tape->pc_stack; *((u16 *)&gcw) = drive->id[ATA_ID_CONFIG]; |