On Fri, Oct 24 2008, Elias Oltmanns wrote: > Jens Axboe <jens.axboe@xxxxxxxxxx> wrote: > > From e598055dde1951c47c8b3522616f6ebff0ed9847 Mon Sep 17 00:00:00 2001 > > From: Jens Axboe <jens.axboe@xxxxxxxxxx> > > Date: Fri, 24 Oct 2008 09:22:42 +0200 > > Subject: [PATCH] libata: fix bug with non-ncq devices > > > > The recent commit 201f1b98822078c808b5e2d379a6ddbfc0a06ee1 to enable > > Wouldn't that be commit 2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e? Yes that is correct, the other commit is actually a private one in my tree for other libata changes. Updated patch below, thanks for checking! >From e598055dde1951c47c8b3522616f6ebff0ed9847 Mon Sep 17 00:00:00 2001 From: Jens Axboe <jens.axboe@xxxxxxxxxx> Date: Fri, 24 Oct 2008 09:22:42 +0200 Subject: [PATCH] libata: fix bug with non-ncq devices The recent commit 2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e to enable support for block layer tagging in libata was broken for non-NCQ devices. The block layer initializes the tag field to -1 to detect invalid uses of a tag, and if the libata devices does NOT support NCQ, we just used that field to index the internal command list. So we need to check for -1 first and only use the tag field if it's valid. Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> --- drivers/ata/libata-scsi.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index d5b9b72..4b95c43 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -708,7 +708,11 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, { struct ata_queued_cmd *qc; - qc = ata_qc_new_init(dev, cmd->request->tag); + if (cmd->request->tag != -1) + qc = ata_qc_new_init(dev, cmd->request->tag); + else + qc = ata_qc_new_init(dev, 0); + if (qc) { qc->scsicmd = cmd; qc->scsidone = done; -- 1.6.0.2.588.g3102 -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html