From 77cb6d5ea6033e5d477947aa682728959d6c3f8f Mon Sep 17 00:00:00 2001 From: Raghava Aditya Renukunta Date: Wed, 10 May 2017 09:39:46 -0700 Subject: [PATCH] scsi: aacraid: Rework SOFT reset code Now the driver issues a soft reset and waits for the controller to be up and running by periodically checking on the status of the controller health registers. Also prevents ARC adapters from issuing soft reset if IOP resets failed. Signed-off-by: Raghava Aditya Renukunta Reviewed-by: David Carroll Signed-off-by: Martin K. Petersen --- drivers/scsi/aacraid/src.c | 38 ++++++++++++++++++-------------------- 1 file changed, 18 insertions(+), 20 deletions(-) diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c index cde4160c3e47..9ad60d63586d 100644 --- a/drivers/scsi/aacraid/src.c +++ b/drivers/scsi/aacraid/src.c @@ -754,8 +754,8 @@ static void aac_send_hardware_soft_reset(struct aac_dev *dev) static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type) { - unsigned long status, start; bool is_ctrl_up; + int ret = 0; if (bled < 0) goto invalid_out; @@ -785,24 +785,21 @@ static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type) else goto set_startup; - /* - * Check to see if KERNEL_UP_AND_RUNNING - * Wait for the adapter to be up and running. - * If !KERNEL_UP_AND_RUNNING issue HW Soft Reset - */ - status = src_readl(dev, MUnit.OMR); - if (dev->sa_firmware - && !(status & KERNEL_UP_AND_RUNNING)) { - start = jiffies; - do { - status = src_readl(dev, MUnit.OMR); - if (time_after(jiffies, - start+HZ*SOFT_RESET_TIME)) { - aac_send_hardware_soft_reset(dev); - start = jiffies; - } - } while (!(status & KERNEL_UP_AND_RUNNING)); + if (!dev->sa_firmware) { + ret = -ENODEV; + goto out; } + + aac_send_hardware_soft_reset(dev); + dev->msi_enabled = 0; + + is_ctrl_up = aac_is_ctrl_up_and_running(dev); + if (!is_ctrl_up) { + dev_err(&dev->pdev->dev, "SOFT reset failed\n"); + ret = -ENODEV; + goto out; + } + break; case HW_SOFT_RESET: if (dev->sa_firmware) { @@ -818,13 +815,14 @@ static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type) invalid_out: if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC) - return -ENODEV; + ret = -ENODEV; set_startup: if (startup_timeout < 300) startup_timeout = 300; - return 0; +out: + return ret; } /** -- 2.20.1