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>

1 files changed, 13 insertions, 31 deletions

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 26d5b05..5c879fb 100644
--- 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;