From a5799d74d965c8a04812ae6a6b26cafb2c099981 Mon Sep 17 00:00:00 2001 From: Raghava Aditya Renukunta Date: Wed, 7 Feb 2018 08:40:57 -0800 Subject: [PATCH] scsi: aacraid: Preserve MSIX mode in the OMR register Preserve the current MSIX mode value in the OMR before rewriting the OMR to initiate the IOP or Soft Reset. Signed-off-by: Prasad B Munirathnam Signed-off-by: Raghava Aditya Renukunta Reviewed-by: Dave Carroll Signed-off-by: Martin K. Petersen --- drivers/scsi/aacraid/src.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c index de48845..09b82d3 100644 --- a/drivers/scsi/aacraid/src.c +++ b/drivers/scsi/aacraid/src.c @@ -680,6 +680,25 @@ void aac_set_intx_mode(struct aac_dev *dev) } } +static void aac_clear_omr(struct aac_dev *dev) +{ + u32 omr_value = 0; + + omr_value = src_readl(dev, MUnit.OMR); + + /* + * Check for PCI Errors or Kernel Panic + */ + if ((omr_value == INVALID_OMR) || (omr_value & KERNEL_PANIC)) + omr_value = 0; + + /* + * Preserve MSIX Value if any + */ + src_writel(dev, MUnit.OMR, omr_value & AAC_INT_MODE_MSIX); + src_readl(dev, MUnit.OMR); +} + static void aac_dump_fw_fib_iop_reset(struct aac_dev *dev) { __le32 supported_options3; @@ -740,6 +759,8 @@ static void aac_send_iop_reset(struct aac_dev *dev) aac_set_intx_mode(dev); + aac_clear_omr(dev); + src_writel(dev, MUnit.IDR, IOP_SRC_RESET_MASK); msleep(5000); @@ -749,6 +770,7 @@ static void aac_send_hardware_soft_reset(struct aac_dev *dev) { u_int32_t val; + aac_clear_omr(dev); val = readl(((char *)(dev->base) + IBW_SWR_OFFSET)); val |= 0x01; writel(val, ((char *)(dev->base) + IBW_SWR_OFFSET)); -- 2.7.4