From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id D1F3ADE0F8 for ; Fri, 15 May 2009 00:50:19 +1000 (EST) Date: Thu, 14 May 2009 09:47:07 -0500 (CDT) From: Kumar Gala To: Jeff Garzik Subject: [PATCH] sata_fsl: Fix the command description of FSL SATA controller Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Dave Liu The bit 11 of command description is reserved bit in Freescale SATA controller and needs to be set to '1'. This is needed to make sure the last write from the controller to the buffer descriptor is seen before an interrupt is raised. Signed-off-by: Dave Liu Signed-off-by: Kumar Gala --- Jeff, please pick this up as a bug fix for 2.6.30 drivers/ata/sata_fsl.c | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c index 5edd654..36b8629 100644 --- a/drivers/ata/sata_fsl.c +++ b/drivers/ata/sata_fsl.c @@ -205,6 +205,7 @@ struct cmdhdr_tbl_entry { * Description information bitdefs */ enum { + CMD_DESC_RES = (1 << 11), VENDOR_SPECIFIC_BIST = (1 << 10), CMD_DESC_SNOOP_ENABLE = (1 << 9), FPDMA_QUEUED_CMD = (1 << 8), @@ -388,7 +389,7 @@ static void sata_fsl_qc_prep(struct ata_queued_cmd *qc) void __iomem *hcr_base = host_priv->hcr_base; unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); struct command_desc *cd; - u32 desc_info = CMD_DESC_SNOOP_ENABLE; + u32 desc_info = CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE; u32 num_prde = 0; u32 ttl_dwords = 0; dma_addr_t cd_paddr; @@ -841,7 +842,7 @@ issue_srst: /* device reset/SRST is a control register update FIS, uses tag0 */ sata_fsl_setup_cmd_hdr_entry(pp, 0, - SRST_CMD | CMD_DESC_SNOOP_ENABLE, 0, 0, 5); + SRST_CMD | CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, 0, 0, 5); tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */ ata_tf_to_fis(&tf, pmp, 0, cfis); @@ -887,7 +888,8 @@ issue_srst: * using ATA signature D2H register FIS to the host controller. */ - sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_SNOOP_ENABLE, 0, 0, 5); + sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_RES | CMD_DESC_SNOOP_ENABLE, + 0, 0, 5); tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */ ata_tf_to_fis(&tf, pmp, 0, cfis); -- 1.6.0.6