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, 9 insertions, 22 deletions

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 4bab0932c94a..e04eaa49a8bf 100644
--- 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)) {