diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2007-09-11 22:28:36 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-09-11 22:28:36 +0200 |
| commit | 6c3c22f3cb2b7cd0a42a024b93db76b5c3133d37 (patch) | |
| tree | 13cd84e47c9d354930443ef7db2df1985446ffc4 | |
| parent | 7293136810936bbde403bcb67ac1b4dbae4dd790 (diff) | |
ide: add ide_dev_is_sata() helper (take 2)
Make the SATA drive detection code from eighty_ninty_three() into inline
ide_dev_is_sata() helper fixing it along the way to be more strict while
checking word 80 for the reserved values...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| -rw-r--r-- | drivers/ide/ide-iops.c | 3 | ||||
| -rw-r--r-- | include/linux/ide.h | 13 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index f4cd2700cae..646a54e233d 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -615,8 +615,7 @@ u8 eighty_ninty_three (ide_drive_t *drive) if (hwif->cbl != ATA_CBL_PATA80 && !ivb) goto no_80w; - /* Check for SATA but only if we are ATA5 or higher */ - if (id->hw_config == 0 && (id->major_rev_num & 0x7FE0)) + if (ide_dev_is_sata(id)) return 1; /* diff --git a/include/linux/ide.h b/include/linux/ide.h index c792b4fd158..b9f66c10caa 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -1378,6 +1378,19 @@ static inline int ide_dev_has_iordy(struct hd_driveid *id) return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0; } +static inline int ide_dev_is_sata(struct hd_driveid *id) +{ + /* + * See if word 93 is 0 AND drive is at least ATA-5 compatible + * verifying that word 80 by casting it to a signed type -- + * this trick allows us to filter out the reserved values of + * 0x0000 and 0xffff along with the earlier ATA revisions... + */ + if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020) + return 1; + return 0; +} + u8 ide_dump_status(ide_drive_t *, const char *, u8); typedef struct ide_pio_timings_s { |