From a51d644af6eb0a93bc383e5f005faa445c87f335 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 20 Mar 2007 15:24:11 +0900 Subject: [PATCH] libata: improve AC_ERR_DEV handling for ->post_internal_cmd ->post_internal_cmd is simplified EH for internal commands. Its primary mission is to stop the controller such that no rogue memory access or other activities occur after the internal command is released. It may provide error diagnostics by setting qc->err_mask but this hasn't been a requirement. To ignore SETXFER failure for CFA devices, libata needs to know whether a command was failed by the device or for any other reason. ie. internal command needs to get AC_ERR_DEV right. This patch makes the following changes to AC_ERR_DEV handling and ->post_internal_cmd semantics to accomodate this need and simplify callback implementation. 1. As long as the correct bits in the result TF registers are set, there is no need to set AC_ERR_DEV explicitly. libata EH core takes care of that for both normal and internal commands. 2. The only requirement for ->post_internal_cmd() is to put the controller into quiescent state. It needs not to set any err_mask. 3. ata_exec_internal_sg() performs minimal error analysis such that AC_ERR_DEV is automatically set as long as result_tf is filled correctly. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/ahci.c | 5 +---- drivers/ata/libata-core.c | 16 ++++++++++------ drivers/ata/libata-eh.c | 4 +++- drivers/ata/sata_inic162x.c | 2 +- drivers/ata/sata_promise.c | 5 +---- drivers/ata/sata_sil24.c | 5 +---- 6 files changed, 17 insertions(+), 20 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index fb9f69252939..cf39987a31c4 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1430,10 +1430,7 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); - if (qc->flags & ATA_QCFLAG_FAILED) - qc->err_mask |= AC_ERR_OTHER; - - if (qc->err_mask) { + if (qc->flags & ATA_QCFLAG_FAILED) { /* make DMA engine forget about the failed command */ ahci_stop_engine(port_mmio); ahci_start_engine(port_mmio); diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 96bf86f67388..2f2884b92434 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1270,12 +1270,16 @@ unsigned ata_exec_internal_sg(struct ata_device *dev, if (ap->ops->post_internal_cmd) ap->ops->post_internal_cmd(qc); - if ((qc->flags & ATA_QCFLAG_FAILED) && !qc->err_mask) { - if (ata_msg_warn(ap)) - ata_dev_printk(dev, KERN_WARNING, - "zero err_mask for failed " - "internal command, assuming AC_ERR_OTHER\n"); - qc->err_mask |= AC_ERR_OTHER; + /* perform minimal error analysis */ + if (qc->flags & ATA_QCFLAG_FAILED) { + if (qc->result_tf.command & (ATA_ERR | ATA_DF)) + qc->err_mask |= AC_ERR_DEV; + + if (!qc->err_mask) + qc->err_mask |= AC_ERR_OTHER; + + if (qc->err_mask & ~AC_ERR_OTHER) + qc->err_mask &= ~AC_ERR_OTHER; } /* finish up */ diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 185876aba647..0dbee550f9e8 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1151,7 +1151,9 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, return ATA_EH_SOFTRESET; } - if (!(qc->err_mask & AC_ERR_DEV)) + if (stat & (ATA_ERR | ATA_DF)) + qc->err_mask |= AC_ERR_DEV; + else return 0; switch (qc->dev->class) { diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c index 11c3079ab6cc..ca4092aaae5b 100644 --- a/drivers/ata/sata_inic162x.c +++ b/drivers/ata/sata_inic162x.c @@ -488,7 +488,7 @@ static void inic_error_handler(struct ata_port *ap) static void inic_post_internal_cmd(struct ata_queued_cmd *qc) { /* make DMA engine forget about the failed command */ - if (qc->err_mask) + if (qc->flags & ATA_QCFLAG_FAILED) inic_reset_port(inic_port_base(qc->ap)); } diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c index a7916d72c4ca..8afde4a9ca7e 100644 --- a/drivers/ata/sata_promise.c +++ b/drivers/ata/sata_promise.c @@ -622,11 +622,8 @@ static void pdc_post_internal_cmd(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; - if (qc->flags & ATA_QCFLAG_FAILED) - qc->err_mask |= AC_ERR_OTHER; - /* make DMA engine forget about the failed command */ - if (qc->err_mask) + if (qc->flags & ATA_QCFLAG_FAILED) pdc_reset_port(ap); } diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c index 6698c746e624..4f522ec04049 100644 --- a/drivers/ata/sata_sil24.c +++ b/drivers/ata/sata_sil24.c @@ -924,11 +924,8 @@ static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; - if (qc->flags & ATA_QCFLAG_FAILED) - qc->err_mask |= AC_ERR_OTHER; - /* make DMA engine forget about the failed command */ - if (qc->err_mask) + if (qc->flags & ATA_QCFLAG_FAILED) sil24_init_port(ap); } -- 2.39.5