Commit a58b8d54 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Kevin Wolf

ide: set WCACHE supported in IDENTIFY data

ATA does not only have the WCACHE enabled bit in identify word 85, but also
a WCACHE supported bit in word 82.  While the Linux kernel is fine with the
latter at least hdparm also needs the former before correctly displaying
the cache settings.  There's also a non-zero chance other operating systems
are more picky in their volatile write cache detection.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 9b036055
......@@ -146,8 +146,8 @@ static void ide_identify(IDEState *s)
put_le16(p + 68, 120);
put_le16(p + 80, 0xf0); /* ata3 -> ata6 supported */
put_le16(p + 81, 0x16); /* conforms to ata5 */
/* 14=NOP supported, 0=SMART supported */
put_le16(p + 82, (1 << 14) | 1);
/* 14=NOP supported, 5=WCACHE supported, 0=SMART supported */
put_le16(p + 82, (1 << 14) | (1 << 5) | 1);
/* 13=flush_cache_ext,12=flush_cache,10=lba48 */
put_le16(p + 83, (1 << 14) | (1 << 13) | (1 <<12) | (1 << 10));
/* 14=set to 1, 1=SMART self test, 0=SMART error logging */
......
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