From 0953dbea1d9a84c8443b5f5bb45229a6c9d7f9f3 Mon Sep 17 00:00:00 2001 From: Marcin Tomczak Date: Wed, 4 Jan 2012 01:33:36 -0800 Subject: [PATCH] [SCSI] isci: fix start OOB Split scu_link_layer_start_oob function to reset and enable and add flush after all steps. Signed-off-by: Marcin Tomczak Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/isci/phy.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c index 61000cde84c7..fe18acfd6eb3 100644 --- a/drivers/scsi/isci/phy.c +++ b/drivers/scsi/isci/phy.c @@ -1098,24 +1098,25 @@ static void scu_link_layer_stop_protocol_engine( writel(enable_spinup_value, &iphy->link_layer_registers->notify_enable_spinup_control); } -/** - * - * - * This method will start the OOB/SN state machine for this struct isci_phy object. - */ -static void scu_link_layer_start_oob( - struct isci_phy *iphy) +static void scu_link_layer_start_oob(struct isci_phy *iphy) { - u32 scu_sas_pcfg_value; - - scu_sas_pcfg_value = - readl(&iphy->link_layer_registers->phy_configuration); - scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); - scu_sas_pcfg_value &= - ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | - SCU_SAS_PCFG_GEN_BIT(HARD_RESET)); - writel(scu_sas_pcfg_value, - &iphy->link_layer_registers->phy_configuration); + struct scu_link_layer_registers __iomem *ll = iphy->link_layer_registers; + u32 val; + + /** Reset OOB sequence - start */ + val = readl(&ll->phy_configuration); + val &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | + SCU_SAS_PCFG_GEN_BIT(HARD_RESET)); + writel(val, &ll->phy_configuration); + readl(&ll->phy_configuration); /* flush */ + /** Reset OOB sequence - end */ + + /** Start OOB sequence - start */ + val = readl(&ll->phy_configuration); + val |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); + writel(val, &ll->phy_configuration); + readl(&ll->phy_configuration); /* flush */ + /** Start OOB sequence - end */ } /** -- 2.39.2