diff options
| -rw-r--r-- | drivers/ide/ide-iops.c | 96 | ||||
| -rw-r--r-- | include/linux/ide.h | 11 |
2 files changed, 45 insertions, 62 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index cf0678b6116..fb524cf175d 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -505,25 +505,19 @@ int wait_for_ready (ide_drive_t *drive, int timeout) * This routine busy-waits for the drive status to be not "busy". * It then checks the status for all of the "good" bits and none * of the "bad" bits, and if all is okay it returns 0. All other - * cases return 1 after invoking ide_error() -- caller should just return. + * cases return error -- caller may then invoke ide_error(). * * This routine should get fixed to not hog the cpu during extra long waits.. * That could be done by busy-waiting for the first jiffy or two, and then * setting a timer to wake up at half second intervals thereafter, * until timeout is achieved, before timing out. */ -int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) +static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) { - ide_hwif_t *hwif = HWIF(drive); - u8 stat; - int i; + ide_hwif_t *hwif = drive->hwif; unsigned long flags; - - /* bail early if we've exceeded max_failures */ - if (drive->max_failures && (drive->failures > drive->max_failures)) { - *startstop = ide_stopped; - return 1; - } + int i; + u8 stat; udelay(1); /* spec allows drive 400ns to assert "BUSY" */ if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { @@ -541,8 +535,8 @@ int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 b break; local_irq_restore(flags); - *startstop = ide_error(drive, "status timeout", stat); - return 1; + *rstat = stat; + return -EBUSY; } } local_irq_restore(flags); @@ -556,11 +550,39 @@ int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 b */ for (i = 0; i < 10; i++) { udelay(1); - if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) + if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) { + *rstat = stat; return 0; + } } - *startstop = ide_error(drive, "status error", stat); - return 1; + *rstat = stat; + return -EFAULT; +} + +/* + * In case of error returns error value after doing "*startstop = ide_error()". + * The caller should return the updated value of "startstop" in this case, + * "startstop" is unchanged when the function returns 0. + */ +int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) +{ + int err; + u8 stat; + + /* bail early if we've exceeded max_failures */ + if (drive->max_failures && (drive->failures > drive->max_failures)) { + *startstop = ide_stopped; + return 1; + } + + err = __ide_wait_stat(drive, good, bad, timeout, &stat); + + if (err) { + char *s = (err == -EBUSY) ? "status timeout" : "status error"; + *startstop = ide_error(drive, s, stat); + } + + return err; } EXPORT_SYMBOL(ide_wait_stat); @@ -778,15 +800,10 @@ int ide_driveid_update (ide_drive_t *drive) #endif } -/* - * Similar to ide_wait_stat(), except it never calls ide_error internally. - * - * const char *msg == consider adding for verbose errors. - */ -int ide_config_drive_speed (ide_drive_t *drive, u8 speed) +int ide_config_drive_speed(ide_drive_t *drive, u8 speed) { - ide_hwif_t *hwif = HWIF(drive); - int i, error = 1; + ide_hwif_t *hwif = drive->hwif; + int error; u8 stat; // while (HWGROUP(drive)->busy) @@ -826,35 +843,10 @@ int ide_config_drive_speed (ide_drive_t *drive, u8 speed) hwif->OUTBSYNC(drive, WIN_SETFEATURES, IDE_COMMAND_REG); if ((IDE_CONTROL_REG) && (drive->quirk_list == 2)) hwif->OUTB(drive->ctl, IDE_CONTROL_REG); - udelay(1); - /* - * Wait for drive to become non-BUSY - */ - if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { - unsigned long flags, timeout; - local_irq_set(flags); - timeout = jiffies + WAIT_CMD; - while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { - if (time_after(jiffies, timeout)) - break; - } - local_irq_restore(flags); - } - /* - * Allow status to settle, then read it again. - * A few rare drives vastly violate the 400ns spec here, - * so we'll wait up to 10usec for a "good" status - * rather than expensively fail things immediately. - * This fix courtesy of Matthew Faupel & Niccolo Rigacci. - */ - for (i = 0; i < 10; i++) { - udelay(1); - if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), drive->ready_stat, BUSY_STAT|DRQ_STAT|ERR_STAT)) { - error = 0; - break; - } - } + error = __ide_wait_stat(drive, drive->ready_stat, + BUSY_STAT|DRQ_STAT|ERR_STAT, + WAIT_CMD, &stat); SELECT_MASK(drive, 0); diff --git a/include/linux/ide.h b/include/linux/ide.h index 85d448b4abe..3a8cb81bb61 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -1079,16 +1079,7 @@ extern void ide_fix_driveid(struct hd_driveid *); */ extern void ide_fixstring(u8 *, const int, const int); -/* - * This routine busy-waits for the drive status to be not "busy". - * It then checks the status for all of the "good" bits and none - * of the "bad" bits, and if all is okay it returns 0. All other - * cases return 1 after doing "*startstop = ide_error()", and the - * caller should return the updated value of "startstop" in this case. - * "startstop" is unchanged when the function returns 0; - * (startstop, drive, good, bad, timeout) - */ -extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long); +int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long); /* * Start a reset operation for an IDE interface. |