From e5f93a36f72c9817b989f573f7140e3dfbce0f49 Mon Sep 17 00:00:00 2001 From: adam radford Date: Sat, 8 Oct 2011 18:15:19 -0700 Subject: [PATCH] [SCSI] megaraid_sas: Add driver workaround for PERC5/1068 kdump kernel panic The following patch for megaraid_sas adds a driver workaround for PERC5/1068 based controller FW that keeps a command from the main kernel that the driver cannot cancel which was causing a kernel panic in shutdown of the kdump kernel. Signed-off-by: Adam Radford Signed-off-by: James Bottomley --- drivers/scsi/megaraid/megaraid_sas.h | 1 + drivers/scsi/megaraid/megaraid_sas_base.c | 19 ++++++++++++++++++- 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 9ffb92daa58b..7375fde2ab4f 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -139,6 +139,7 @@ #define MFI_CMD_ABORT 0x06 #define MFI_CMD_SMP 0x07 #define MFI_CMD_STP 0x08 +#define MFI_CMD_INVALID 0xff #define MR_DCMD_CTRL_GET_INFO 0x01010000 #define MR_DCMD_LD_GET_LIST 0x03010000 diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index ec09d5c2ed90..de2f47c439c7 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -215,6 +215,10 @@ megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) cmd->scmd = NULL; cmd->frame_count = 0; + if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) && + (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) && + (reset_devices)) + cmd->frame->hdr.cmd = MFI_CMD_INVALID; list_add_tail(&cmd->list, &instance->cmd_pool); spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); @@ -2165,7 +2169,16 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, cmd->scmd->SCp.ptr = NULL; switch (hdr->cmd) { - + case MFI_CMD_INVALID: + /* Some older 1068 controller FW may keep a pended + MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel + when booting the kdump kernel. Ignore this command to + prevent a kernel panic on shutdown of the kdump kernel. */ + printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command " + "completed.\n"); + printk(KERN_WARNING "megaraid_sas: If you have a controller " + "other than PERC5, please upgrade your firmware.\n"); + break; case MFI_CMD_PD_SCSI_IO: case MFI_CMD_LD_SCSI_IO: @@ -2934,6 +2947,10 @@ static int megasas_create_frame_pool(struct megasas_instance *instance) memset(cmd->frame, 0, total_sz); cmd->frame->io.context = cmd->index; cmd->frame->io.pad_0 = 0; + if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) && + (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) && + (reset_devices)) + cmd->frame->hdr.cmd = MFI_CMD_INVALID; } return 0; -- 2.20.1