From: Robert Hancock Date: Thu, 30 Jul 2009 20:11:29 +0000 (-0600) Subject: sata_sil24: always set protocol override for non-ATAPI data commands X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4f1a0ee11d6f9c104c8e6a13dae995709a6922a8;p=linux-beck.git sata_sil24: always set protocol override for non-ATAPI data commands The sil24 hardware has a built-in list of commands and associated protocols that gets used by default to decide how to handle a given command. However, if the command is not known to the controller then it presumably assumes it to be a non-data command which then causes protocol mismatch errors if the device ends up requesting data transfer. The new DATA SET MANAGEMENT - Trim command causes this issue since it's a DMA data-out command. Since we should always know best what protocol the command should be using, let's just set the override flag to inform the controller what protocol to use for all non-ATAPI commands with data transfer. Signed-off-by: Robert Hancock Tested-by: Mark Lord Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c index 77aa8d7ecec4..e6946fc527d0 100644 --- a/drivers/ata/sata_sil24.c +++ b/drivers/ata/sata_sil24.c @@ -846,6 +846,17 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) if (!ata_is_atapi(qc->tf.protocol)) { prb = &cb->ata.prb; sge = cb->ata.sge; + if (ata_is_data(qc->tf.protocol)) { + u16 prot = 0; + ctrl = PRB_CTRL_PROTOCOL; + if (ata_is_ncq(qc->tf.protocol)) + prot |= PRB_PROT_NCQ; + if (qc->tf.flags & ATA_TFLAG_WRITE) + prot |= PRB_PROT_WRITE; + else + prot |= PRB_PROT_READ; + prb->prot = cpu_to_le16(prot); + } } else { prb = &cb->atapi.prb; sge = cb->atapi.sge;