ide: replace IDE_TFLAG_* flags by IDE_VALID_*

Replace IDE_TFLAG_{IN|OUT}_* flags meaning to the taskfile register validity on
input/output by the IDE_VALID_* flags and introduce 4 symmetric 8-bit register
validity indicator subfields, 'valid.{input/output}.{tf|hob}', into the 'struct
ide_cmd' instead of using the 'tf_flags' field for that purpose (this field can
then be turned from 32-bit into 8-bit one).

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

1 files changed, 28 insertions, 22 deletions

diff --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c
index 55e48db..38a715e 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -649,34 +649,37 @@ static void scc_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
 {
 	struct ide_io_ports *io_ports = &drive->hwif->io_ports;
 	struct ide_taskfile *tf = &cmd->tf;
+	u8 valid = cmd->valid.out.hob;
 	u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
 
 	if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
 		HIHI = 0xFF;
 
-	if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+	if (valid & IDE_VALID_FEATURE)
 		scc_ide_outb(tf->hob_feature, io_ports->feature_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+	if (valid & IDE_VALID_NSECT)
 		scc_ide_outb(tf->hob_nsect, io_ports->nsect_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+	if (valid & IDE_VALID_LBAL)
 		scc_ide_outb(tf->hob_lbal, io_ports->lbal_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+	if (valid & IDE_VALID_LBAM)
 		scc_ide_outb(tf->hob_lbam, io_ports->lbam_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+	if (valid & IDE_VALID_LBAH)
 		scc_ide_outb(tf->hob_lbah, io_ports->lbah_addr);
 
-	if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
+	valid = cmd->valid.out.tf;
+
+	if (valid & IDE_VALID_FEATURE)
 		scc_ide_outb(tf->feature, io_ports->feature_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
+	if (valid & IDE_VALID_NSECT)
 		scc_ide_outb(tf->nsect, io_ports->nsect_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
+	if (valid & IDE_VALID_LBAL)
 		scc_ide_outb(tf->lbal, io_ports->lbal_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
+	if (valid & IDE_VALID_LBAM)
 		scc_ide_outb(tf->lbam, io_ports->lbam_addr);
-	if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
+	if (valid & IDE_VALID_LBAH)
 		scc_ide_outb(tf->lbah, io_ports->lbah_addr);
 
-	if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
+	if (valid & IDE_VALID_DEVICE)
 		scc_ide_outb((tf->device & HIHI) | drive->select,
 			     io_ports->device_addr);
 }
@@ -685,35 +688,38 @@ static void scc_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
 {
 	struct ide_io_ports *io_ports = &drive->hwif->io_ports;
 	struct ide_taskfile *tf = &cmd->tf;
+	u8 valid = cmd->valid.in.tf;
 
 	/* be sure we're looking at the low order bits */
 	scc_ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-	if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+	if (valid & IDE_VALID_ERROR)
 		tf->error  = scc_ide_inb(io_ports->feature_addr);
-	if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
+	if (valid & IDE_VALID_NSECT)
 		tf->nsect  = scc_ide_inb(io_ports->nsect_addr);
-	if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
+	if (valid & IDE_VALID_LBAL)
 		tf->lbal   = scc_ide_inb(io_ports->lbal_addr);
-	if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
+	if (valid & IDE_VALID_LBAM)
 		tf->lbam   = scc_ide_inb(io_ports->lbam_addr);
-	if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
+	if (valid & IDE_VALID_LBAH)
 		tf->lbah   = scc_ide_inb(io_ports->lbah_addr);
-	if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
+	if (valid & IDE_VALID_DEVICE)
 		tf->device = scc_ide_inb(io_ports->device_addr);
 
 	if (cmd->tf_flags & IDE_TFLAG_LBA48) {
 		scc_ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+		valid = cmd->valid.in.hob;
+
+		if (valid & IDE_VALID_ERROR)
 			tf->hob_error = scc_ide_inb(io_ports->feature_addr);
-		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+		if (valid & IDE_VALID_NSECT)
 			tf->hob_nsect = scc_ide_inb(io_ports->nsect_addr);
-		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+		if (valid & IDE_VALID_LBAL)
 			tf->hob_lbal  = scc_ide_inb(io_ports->lbal_addr);
-		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+		if (valid & IDE_VALID_LBAM)
 			tf->hob_lbam  = scc_ide_inb(io_ports->lbam_addr);
-		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+		if (valid & IDE_VALID_LBAH)
 			tf->hob_lbah  = scc_ide_inb(io_ports->lbah_addr);
 	}
 }