ide: add ide_init_pc() helper

* Add IDE_PC_BUFFER_SIZE define.

* Add ide_init_pc() and convert ide-{floppy,tape}.c to use it
  instead of ide*_init_pc().

* Remove no longer used IDE*_PC_BUFFER_SIZE and ide*_init_pc().

There should be no functional changes caused by this patch.

Acked-by: Borislav Petkov <petkovbb@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 3d44b45..8f0842c 100644 (file)
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -111,6 +111,14 @@ int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 }
 EXPORT_SYMBOL_GPL(ide_io_buffers);
 
+void ide_init_pc(struct ide_atapi_pc *pc)
+{
+       memset(pc, 0, sizeof(*pc));
+       pc->buf = pc->pc_buf;
+       pc->buf_size = IDE_PC_BUFFER_SIZE;
+}
+EXPORT_SYMBOL_GPL(ide_init_pc);
+
 /* TODO: unify the code thus making some arguments go away */
 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,

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 4bab093..e04eaa4 100644 (file)
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -69,12 +69,6 @@
  */
 #define IDEFLOPPY_MAX_PC_RETRIES       3
 
-/*
- * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
- * bytes.
- */
-#define IDEFLOPPY_PC_BUFFER_SIZE       256
-
 /* format capacities descriptor codes */
 #define CAPACITY_INVALID       0x00
 #define CAPACITY_UNFORMATTED   0x01
@@ -274,16 +268,9 @@ static void ide_floppy_callback(ide_drive_t *drive)
        idefloppy_end_request(drive, uptodate, 0);
 }
 
-static void idefloppy_init_pc(struct ide_atapi_pc *pc)
-{
-       memset(pc, 0, sizeof(*pc));
-       pc->buf = pc->pc_buf;
-       pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
-}
-
 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 {
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_REQUEST_SENSE;
        pc->c[4] = 255;
        pc->req_xfer = 18;
@@ -413,14 +400,14 @@ static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 {
        debug_log("creating prevent removal command, prevent = %d\n", prevent);
 
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
        pc->c[4] = prevent;
 }
 
 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 {
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
        pc->c[7] = 255;
        pc->c[8] = 255;
@@ -430,7 +417,7 @@ static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
                int l, int flags)
 {
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_FORMAT_UNIT;
        pc->c[1] = 0x17;
 
@@ -454,7 +441,7 @@ static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 {
        u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_MODE_SENSE_10;
        pc->c[1] = 0;
        pc->c[2] = page_code;
@@ -476,7 +463,7 @@ static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
 
 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 {
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = GPCMD_START_STOP_UNIT;
        pc->c[4] = start;
 }
@@ -492,7 +479,7 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
        debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
                block, blocks);
 
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
        put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
        put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
@@ -511,7 +498,7 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
                struct ide_atapi_pc *pc, struct request *rq)
 {
-       idefloppy_init_pc(pc);
+       ide_init_pc(pc);
        memcpy(pc->c, rq->cmd, sizeof(pc->c));
        pc->rq = rq;
        pc->b_count = 0;
@@ -1071,7 +1058,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
                drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
                /* Just in case */
 
-               idefloppy_init_pc(&pc);
+               ide_init_pc(&pc);
                pc.c[0] = GPCMD_TEST_UNIT_READY;
 
                if (idefloppy_queue_pc_tail(drive, &pc)) {

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 26d5b05..5c879fb 100644 (file)
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -81,12 +81,6 @@ enum {
 #define IDETAPE_MAX_PC_RETRIES         3
 
 /*
- * With each packet command, we allocate a buffer of IDETAPE_PC_BUFFER_SIZE
- * bytes. This is used for several packet commands (Not for READ/WRITE commands)
- */
-#define IDETAPE_PC_BUFFER_SIZE         256
-
-/*
  * 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).
@@ -610,21 +604,9 @@ static void ide_tape_callback(ide_drive_t *drive)
        idetape_end_request(drive, uptodate, 0);
 }
 
-static void idetape_init_pc(struct ide_atapi_pc *pc)
-{
-       memset(pc->c, 0, 12);
-       pc->retries = 0;
-       pc->flags = 0;
-       pc->req_xfer = 0;
-       pc->buf = pc->pc_buf;
-       pc->buf_size = IDETAPE_PC_BUFFER_SIZE;
-       pc->bh = NULL;
-       pc->b_data = NULL;
-}
-
 static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = REQUEST_SENSE;
        pc->c[4] = 20;
        pc->req_xfer = 20;
@@ -816,7 +798,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 /* A mode sense command is used to "sense" tape parameters. */
 static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = MODE_SENSE;
        if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
                /* DBD = 1 - Don't return block descriptors */
@@ -875,7 +857,7 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
        struct idetape_bh *bh = (struct idetape_bh *)rq->special;
        unsigned int length = rq->current_nr_sectors;
 
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
        pc->c[1] = 1;
        pc->bh = bh;
@@ -1165,7 +1147,7 @@ static void idetape_init_merge_buffer(idetape_tape_t *tape)
 static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
                struct ide_atapi_pc *pc, int write_filemark)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = WRITE_FILEMARKS;
        pc->c[4] = write_filemark;
        pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@@ -1173,7 +1155,7 @@ static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
 
 static void idetape_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = TEST_UNIT_READY;
 }
 
@@ -1200,7 +1182,7 @@ static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 static void idetape_create_load_unload_cmd(ide_drive_t *drive,
                struct ide_atapi_pc *pc, int cmd)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = START_STOP;
        pc->c[4] = cmd;
        pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@@ -1252,7 +1234,7 @@ static int idetape_flush_tape_buffers(ide_drive_t *drive)
 
 static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = READ_POSITION;
        pc->req_xfer = 20;
 }
@@ -1276,7 +1258,7 @@ static void idetape_create_locate_cmd(ide_drive_t *drive,
                struct ide_atapi_pc *pc,
                unsigned int block, u8 partition, int skip)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = POSITION_TO_ELEMENT;
        pc->c[1] = 2;
        put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
@@ -1293,7 +1275,7 @@ static int idetape_create_prevent_cmd(ide_drive_t *drive,
        if (!(tape->caps[6] & 0x01))
                return 0;
 
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = ALLOW_MEDIUM_REMOVAL;
        pc->c[4] = prevent;
        return 1;
@@ -1408,7 +1390,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
 
 static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = INQUIRY;
        pc->c[4] = 254;
        pc->req_xfer = 254;
@@ -1417,14 +1399,14 @@ static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
 static void idetape_create_rewind_cmd(ide_drive_t *drive,
                struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = REZERO_UNIT;
        pc->flags |= PC_FLAG_WAIT_FOR_DSC;
 }
 
 static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = ERASE;
        pc->c[1] = 1;
        pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@@ -1432,7 +1414,7 @@ static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
 
 static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
 {
-       idetape_init_pc(pc);
+       ide_init_pc(pc);
        pc->c[0] = SPACE;
        put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
        pc->c[1] = cmd;

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 03dc215..bba2f73 100644 (file)
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -724,6 +724,12 @@ enum {
        PC_FLAG_TIMEDOUT                = (1 << 7),
 };
 
+/*
+ * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
+ * This is used for several packet commands (not for READ/WRITE commands).
+ */
+#define IDE_PC_BUFFER_SIZE     256
+
 struct ide_atapi_pc {
        /* actual packet bytes */
        u8 c[12];
@@ -753,7 +759,7 @@ struct ide_atapi_pc {
         * those are more or less driver-specific and some of them are subject
         * to change/removal later.
         */
-       u8 pc_buf[256];
+       u8 pc_buf[IDE_PC_BUFFER_SIZE];
 
        /* idetape only */
        struct idetape_bh *bh;
@@ -1113,6 +1119,8 @@ void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
 
 int ide_check_atapi_device(ide_drive_t *, const char *);
 
+void ide_init_pc(struct ide_atapi_pc *);
+
 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 *),