ide: rename IDE_TFLAG_IN_[HOB_]FEATURE

The feature register has never been readable -- when its location is read, one
gets the error register value; hence rename IDE_TFLAG_IN_[HOB_]FEATURE into
IDE_TFLAG_IN_[HOB_]ERROR and introduce the 'hob_error' field into the 'struct
ide_taskfile' (despite the error register not really depending on the HOB bit).

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

9 files changed, 65 insertions, 63 deletions

diff --git a/drivers/ide/at91_ide.c b/drivers/ide/at91_ide.c
index e6e96743aa7b..9dce793d93b4 100644
--- a/drivers/ide/at91_ide.c
+++ b/drivers/ide/at91_ide.c
@@ -244,8 +244,8 @@ static void at91_ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         ide_mm_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = ide_mm_inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = ide_mm_inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = ide_mm_inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -260,16 +260,16 @@ static void at91_ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 ide_mm_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature = ide_mm_inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = ide_mm_inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = ide_mm_inb(io_ports->nsect_addr);
+                        tf->hob_nsect = ide_mm_inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = ide_mm_inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = ide_mm_inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = ide_mm_inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = ide_mm_inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = ide_mm_inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = ide_mm_inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/drivers/ide/ide-h8300.c b/drivers/ide/ide-h8300.c
index a57ccad61acf..1d45cd5b6a1c 100644
--- a/drivers/ide/ide-h8300.c
+++ b/drivers/ide/ide-h8300.c
@@ -100,8 +100,8 @@ static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -116,16 +116,16 @@ static void h8300_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature = inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = inb(io_ports->nsect_addr);
+                        tf->hob_nsect = inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c
index bbeedce6b17d..31f5c5f4c093 100644
--- a/drivers/ide/ide-io-std.c
+++ b/drivers/ide/ide-io-std.c
@@ -159,8 +159,8 @@ void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = tf_inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = tf_inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = tf_inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -175,16 +175,16 @@ void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature = tf_inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = tf_inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = tf_inb(io_ports->nsect_addr);
+                        tf->hob_nsect = tf_inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = tf_inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = tf_inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = tf_inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = tf_inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = tf_inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = tf_inb(io_ports->lbah_addr);
         }
 }
 EXPORT_SYMBOL_GPL(ide_tf_read);
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index ae227dd8466f..6f363a26700d 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -55,7 +55,7 @@ u8 ide_read_error(ide_drive_t *drive)
         struct ide_cmd cmd;
 
         memset(&cmd, 0, sizeof(cmd));
-        cmd.tf_flags = IDE_TFLAG_IN_FEATURE;
+        cmd.tf_flags = IDE_TFLAG_IN_ERROR;
 
         drive->hwif->tp_ops->tf_read(drive, &cmd);
 
diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c
index 00ab0be7335a..0a6cf74c3265 100644
--- a/drivers/ide/ns87415.c
+++ b/drivers/ide/ns87415.c
@@ -76,8 +76,8 @@ static void superio_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -92,16 +92,16 @@ static void superio_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature = inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = inb(io_ports->nsect_addr);
+                        tf->hob_nsect = inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c
index 6ba4983d831c..ea0a9752c6f9 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -702,8 +702,8 @@ static void scc_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* 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_FEATURE)
-                tf->feature = scc_ide_inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = scc_ide_inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = scc_ide_inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -718,16 +718,16 @@ static void scc_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         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_FEATURE)
-                        tf->hob_feature = scc_ide_inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = scc_ide_inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = scc_ide_inb(io_ports->nsect_addr);
+                        tf->hob_nsect = scc_ide_inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = scc_ide_inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = scc_ide_inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = scc_ide_inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = scc_ide_inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = scc_ide_inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = scc_ide_inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
index ec3aa32fbbe0..606c37f5267d 100644
--- a/drivers/ide/tx4938ide.c
+++ b/drivers/ide/tx4938ide.c
@@ -144,8 +144,8 @@ static void tx4938ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         tx4938ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = tx4938ide_inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = tx4938ide_inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = tx4938ide_inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -160,17 +160,16 @@ static void tx4938ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 tx4938ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature =
-                                tx4938ide_inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = tx4938ide_inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = tx4938ide_inb(io_ports->nsect_addr);
+                        tf->hob_nsect = tx4938ide_inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = tx4938ide_inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = tx4938ide_inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = tx4938ide_inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = tx4938ide_inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = tx4938ide_inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = tx4938ide_inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 43bc0372413a..f1e9da71110c 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -511,8 +511,8 @@ static void tx4939ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         /* be sure we're looking at the low order bits */
         tx4939ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-        if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
-                tf->feature = tx4939ide_inb(io_ports->feature_addr);
+        if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
+                tf->error  = tx4939ide_inb(io_ports->feature_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
                 tf->nsect  = tx4939ide_inb(io_ports->nsect_addr);
         if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
@@ -527,17 +527,16 @@ static void tx4939ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
                 tx4939ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
-                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-                        tf->hob_feature =
-                                tx4939ide_inb(io_ports->feature_addr);
+                if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
+                        tf->hob_error = tx4939ide_inb(io_ports->feature_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-                        tf->hob_nsect   = tx4939ide_inb(io_ports->nsect_addr);
+                        tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-                        tf->hob_lbal    = tx4939ide_inb(io_ports->lbal_addr);
+                        tf->hob_lbal  = tx4939ide_inb(io_ports->lbal_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-                        tf->hob_lbam    = tx4939ide_inb(io_ports->lbam_addr);
+                        tf->hob_lbam  = tx4939ide_inb(io_ports->lbam_addr);
                 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-                        tf->hob_lbah    = tx4939ide_inb(io_ports->lbah_addr);
+                        tf->hob_lbah  = tx4939ide_inb(io_ports->lbah_addr);
         }
 }
 
diff --git a/include/linux/ide.h b/include/linux/ide.h
index ccb70abe991b..e919c865f0c7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -265,7 +265,7 @@ enum {
         IDE_TFLAG_WRITE                 = (1 << 12),
         IDE_TFLAG_CUSTOM_HANDLER        = (1 << 13),
         IDE_TFLAG_DMA_PIO_FALLBACK      = (1 << 14),
-        IDE_TFLAG_IN_HOB_FEATURE        = (1 << 15),
+        IDE_TFLAG_IN_HOB_ERROR          = (1 << 15),
         IDE_TFLAG_IN_HOB_NSECT          = (1 << 16),
         IDE_TFLAG_IN_HOB_LBAL           = (1 << 17),
         IDE_TFLAG_IN_HOB_LBAM           = (1 << 18),
@@ -273,10 +273,10 @@ enum {
         IDE_TFLAG_IN_HOB_LBA            = IDE_TFLAG_IN_HOB_LBAL |
                                           IDE_TFLAG_IN_HOB_LBAM |
                                           IDE_TFLAG_IN_HOB_LBAH,
-        IDE_TFLAG_IN_HOB                = IDE_TFLAG_IN_HOB_FEATURE |
+        IDE_TFLAG_IN_HOB                = IDE_TFLAG_IN_HOB_ERROR |
                                           IDE_TFLAG_IN_HOB_NSECT |
                                           IDE_TFLAG_IN_HOB_LBA,
-        IDE_TFLAG_IN_FEATURE            = (1 << 20),
+        IDE_TFLAG_IN_ERROR              = (1 << 20),
         IDE_TFLAG_IN_NSECT              = (1 << 21),
         IDE_TFLAG_IN_LBAL               = (1 << 22),
         IDE_TFLAG_IN_LBAM               = (1 << 23),
@@ -310,8 +310,12 @@ enum {
 
 struct ide_taskfile {
         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
+                                /*  1-5: additional data to support LBA48 */
+        union {
+                u8 hob_error;   /*   read: error */
+                u8 hob_feature; /*  write: feature */
+        };
 
-        u8      hob_feature;    /*  1-5: additional data to support LBA48 */
         u8      hob_nsect;
         u8      hob_lbal;
         u8      hob_lbam;