ide: fix registers loading order for IDE_NSECTOR_REG in execute_drive_cmd()

Move loading of IDE_NSECTOR_REG from ide_cmd() to execute_drive_cmd()
(load the IDE_NSECTOR_REG just after IDE_FEATURE_REG).

This also allows us to drop 'nsect' argument from ide_cmd() and simplify
execute_drive_cmd() code for REQ_TYPE_ATA_CMD case a bit.

It shouldn't affect anything (just a usual paranoia to separate changes
which change the way in which hardware is accessed from code cleanups).
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <>
parent 46f26c36
......@@ -624,21 +624,18 @@ ide_startstop_t ide_abort(ide_drive_t *drive, const char *msg)
* ide_cmd - issue a simple drive command
* @drive: drive the command is for
* @cmd: command byte
* @nsect: sector byte
* @handler: handler for the command completion
* Issue a simple drive command with interrupts.
* The drive must be selected beforehand.
static void ide_cmd (ide_drive_t *drive, u8 cmd, u8 nsect,
ide_handler_t *handler)
static void ide_cmd(ide_drive_t *drive, u8 cmd, ide_handler_t *handler)
ide_hwif_t *hwif = HWIF(drive);
hwif->OUTB(drive->ctl,IDE_CONTROL_REG); /* clear nIEN */
ide_execute_command(drive, cmd, handler, WAIT_CMD, NULL);
......@@ -913,11 +910,12 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
printk("sel=0x%02x\n", args[6]);
hwif->OUTB(args[1], IDE_FEATURE_REG);
hwif->OUTB(args[2], IDE_NSECTOR_REG);
hwif->OUTB(args[3], IDE_SECTOR_REG);
hwif->OUTB(args[4], IDE_LCYL_REG);
hwif->OUTB(args[5], IDE_HCYL_REG);
hwif->OUTB((args[6] & 0xEF)|drive->select.all, IDE_SELECT_REG);
ide_cmd(drive, args[0], args[2], &drive_cmd_intr);
ide_cmd(drive, args[0], &drive_cmd_intr);
return ide_started;
} else if (rq->cmd_type == REQ_TYPE_ATA_CMD) {
u8 *args = rq->buffer;
......@@ -931,16 +929,15 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
printk("fr=0x%02x ", args[2]);
printk("xx=0x%02x\n", args[3]);
hwif->OUTB(args[2], IDE_FEATURE_REG);
if (args[0] == WIN_SMART) {
hwif->OUTB(0x4f, IDE_LCYL_REG);
hwif->OUTB(0xc2, IDE_HCYL_REG);
ide_cmd(drive, args[0], args[3], &drive_cmd_intr);
return ide_started;
ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
} else
hwif->OUTB(args[1], IDE_NSECTOR_REG);
ide_cmd(drive, args[0], &drive_cmd_intr);
return ide_started;
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