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@xxxxxxxxxxxxx>
---
This version doesn't flip the MSB, it just casts word80 to 'signed short'
This is still against the current Linus' tree and unfortunately I was able to
only compile test it since that tree gives MODPOST warning and dies early on
bootup (yes, Bart this is still the case). Alos, I have no SATA bridge/drive
here at hand...
drivers/ide/ide-iops.c | 3 +--
include/linux/ide.h | 13 +++++++++++++
2 files changed, 14 insertions(+), 2 deletions(-)
Index: linux-2.6/drivers/ide/ide-iops.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-iops.c
+++ linux-2.6/drivers/ide/ide-iops.c
@@ -615,8 +615,7 @@ u8 eighty_ninty_three (ide_drive_t *driv
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;
/*
Index: linux-2.6/include/linux/ide.h
===================================================================
--- linux-2.6.orig/include/linux/ide.h
+++ linux-2.6/include/linux/ide.h
@@ -1380,6 +1380,19 @@ static inline int ide_dev_has_iordy(stru
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 {
-
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