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Message-ID: <20061216143221.47c5e7f3@localhost.localdomain> Date: Sat, 16 Dec 2006 14:32:21 +0000 From: Alan <alan@...rguk.ukuu.org.uk> To: torvalds@...l.org, linux-kernel@...r.kernel.org, jgarzik@...ox.com Subject: [PATCH] pata_via: Cable detect error The UDMA66 VIA hardware has no controller side cable detect bits we can use. This patch minimally fixes the problem by reporting unknown in this case and using drive side detection. The old drivers/ide code does some additional tricks but those aren't appropriate now we are in -rc. Without this update UDMA66 via controllers run slowly. They don't fail so it's a borderline call whether this is -rc material or not. Signed-off-by: Alan Cox <alan@...hat.com> --- linux.vanilla-2.6.20-rc1/drivers/ata/pata_via.c 2006-12-14 17:23:30.000000000 +0000 +++ linux-2.6.20-rc1/drivers/ata/pata_via.c 2006-12-16 14:05:12.044300968 +0000 @@ -161,10 +161,15 @@ return -ENOENT; } - if ((config->flags & VIA_UDMA) >= VIA_UDMA_66) + if ((config->flags & VIA_UDMA) >= VIA_UDMA_100) ap->cbl = via_cable_detect(ap); - else + /* The UDMA66 series has no cable detect so do drive side detect */ + else if ((config->flags & VIA_UDMA) < VIA_UDMA_66) ap->cbl = ATA_CBL_PATA40; + else + ap->cbl = ATA_CBL_PATA_UNK; + + return ata_std_prereset(ap); } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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