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Message-ID: <3a237529c12b20e6b7a4c8de82b6a3ee@mail.gmail.com>
Date: Wed, 29 Apr 2015 11:14:43 +0530
From: Sumit Saxena <sumit.saxena@...gotech.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Kashyap Desai <kashyap.desai@...gotech.com>,
Uday Lingala <uday.lingala@...gotech.com>
Cc: "PDL,MEGARAIDLINUX" <megaraidlinux.pdl@...gotech.com>,
"James E.J. Bottomley" <JBottomley@...n.com>,
linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: RE: [PATCH 3/3] megaraid_sas: use dev_printk when possible
>-----Original Message-----
>From: Bjorn Helgaas [mailto:bhelgaas@...gle.com]
>Sent: Wednesday, April 29, 2015 4:44 AM
>To: Kashyap Desai; Uday Lingala; Sumit Saxena
>Cc: megaraidlinux.pdl@...gotech.com; James E.J. Bottomley; linux-
>kernel@...r.kernel.org; linux-scsi@...r.kernel.org
>Subject: [PATCH 3/3] megaraid_sas: use dev_printk when possible
>
>Use dev_printk() when possible to make messages more useful.
>
>Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
>---
> drivers/scsi/megaraid/megaraid_sas_fusion.c | 96 ++++++++++++++---------
>----
> 1 file changed, 48 insertions(+), 48 deletions(-)
>
>diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>index 5a0800d..0b20bd8 100644
>--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>@@ -173,7 +173,7 @@ struct megasas_cmd_fusion
>*megasas_get_cmd_fusion(struct megasas_instance
> struct megasas_cmd_fusion, list);
> list_del_init(&cmd->list);
> } else {
>- printk(KERN_ERR "megasas: Command pool (fusion)
>empty!\n");
>+ dev_err(&instance->pdev->dev, "Command pool (fusion)
>empty!\n");
> }
>
> spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags); @@ -244,7
>+244,7 @@ static void megasas_teardown_frame_pool_fusion(
> struct megasas_cmd_fusion *cmd;
>
> if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
>- printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
>+ dev_err(&instance->pdev->dev, "dma pool is null. SG Pool
>%p, "
> "sense pool : %p\n", fusion->sg_dma_pool,
> fusion->sense_dma_pool);
> return;
>@@ -356,7 +356,7 @@ static int megasas_create_frame_pool_fusion(struct
>megasas_instance *instance)
> total_sz_chain_frame, 4,
> 0);
> if (!fusion->sg_dma_pool) {
>- printk(KERN_DEBUG "megasas: failed to setup request pool "
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "failed to
>setup request pool "
> "fusion\n");
> return -ENOMEM;
> }
>@@ -365,7 +365,7 @@ static int megasas_create_frame_pool_fusion(struct
>megasas_instance *instance)
> SCSI_SENSE_BUFFERSIZE, 64,
>0);
>
> if (!fusion->sense_dma_pool) {
>- printk(KERN_DEBUG "megasas: failed to setup sense pool "
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "failed to
>setup sense pool "
> "fusion\n");
> pci_pool_destroy(fusion->sg_dma_pool);
> fusion->sg_dma_pool = NULL;
>@@ -390,7 +390,7 @@ static int megasas_create_frame_pool_fusion(struct
>megasas_instance *instance)
> * whatever has been allocated
> */
> if (!cmd->sg_frame || !cmd->sense) {
>- printk(KERN_DEBUG "megasas: pci_pool_alloc
>failed\n");
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev,
>"pci_pool_alloc
>+failed\n");
> megasas_teardown_frame_pool_fusion(instance);
> return -ENOMEM;
> }
>@@ -436,7 +436,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> &fusion->req_frames_desc_phys,
>GFP_KERNEL);
>
> if (!fusion->req_frames_desc) {
>- printk(KERN_ERR "megasas; Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "request_frames\n");
> goto fail_req_desc;
> }
>@@ -447,7 +447,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> fusion->reply_alloc_sz * count, 16, 0);
>
> if (!fusion->reply_frames_desc_pool) {
>- printk(KERN_ERR "megasas; Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "reply_frame pool\n");
> goto fail_reply_desc;
> }
>@@ -456,7 +456,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> pci_pool_alloc(fusion->reply_frames_desc_pool,
>GFP_KERNEL,
> &fusion->reply_frames_desc_phys);
> if (!fusion->reply_frames_desc) {
>- printk(KERN_ERR "megasas; Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "reply_frame pool\n");
> pci_pool_destroy(fusion->reply_frames_desc_pool);
> goto fail_reply_desc;
>@@ -473,7 +473,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> fusion->io_frames_alloc_sz, 16, 0);
>
> if (!fusion->io_request_frames_pool) {
>- printk(KERN_ERR "megasas: Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "io_request_frame pool\n");
> goto fail_io_frames;
> }
>@@ -482,7 +482,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> pci_pool_alloc(fusion->io_request_frames_pool,
>GFP_KERNEL,
> &fusion->io_request_frames_phys);
> if (!fusion->io_request_frames) {
>- printk(KERN_ERR "megasas: Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "io_request_frames frames\n");
> pci_pool_destroy(fusion->io_request_frames_pool);
> goto fail_io_frames;
>@@ -497,7 +497,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> * max_cmd, GFP_KERNEL);
>
> if (!fusion->cmd_list) {
>- printk(KERN_DEBUG "megasas: out of memory. Could not
>alloc "
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "out of
>memory. Could not alloc "
> "memory for cmd_list_fusion\n");
> goto fail_cmd_list;
> }
>@@ -507,7 +507,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> fusion->cmd_list[i] = kmalloc(sizeof(struct
>megasas_cmd_fusion),
> GFP_KERNEL);
> if (!fusion->cmd_list[i]) {
>- printk(KERN_ERR "Could not alloc cmd list fusion\n");
>+ dev_err(&instance->pdev->dev, "Could not alloc cmd
>list fusion\n");
>
> for (j = 0; j < i; j++)
> kfree(fusion->cmd_list[j]);
>@@ -551,7 +551,7 @@ megasas_alloc_cmds_fusion(struct megasas_instance
>*instance)
> * Create a frame pool and assign one frame to each cmd
> */
> if (megasas_create_frame_pool_fusion(instance)) {
>- printk(KERN_DEBUG "megasas: Error creating frame DMA
>pool\n");
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "Error
>creating frame
>+DMA pool\n");
> megasas_free_cmds_fusion(instance);
> goto fail_req_desc;
> }
>@@ -639,7 +639,7 @@ megasas_ioc_init_fusion(struct megasas_instance
>*instance)
> cmd = megasas_get_cmd(instance);
>
> if (!cmd) {
>- printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
>+ dev_err(&instance->pdev->dev, "Could not allocate cmd for
>INIT
>+Frame\n");
> ret = 1;
> goto fail_get_cmd;
> }
>@@ -650,7 +650,7 @@ megasas_ioc_init_fusion(struct megasas_instance
>*instance)
> &ioc_init_handle, GFP_KERNEL);
>
> if (!IOCInitMessage) {
>- printk(KERN_ERR "Could not allocate memory for "
>+ dev_err(&instance->pdev->dev, "Could not allocate memory
>for "
> "IOCInitMessage\n");
> ret = 1;
> goto fail_fw_init;
>@@ -729,7 +729,7 @@ megasas_ioc_init_fusion(struct megasas_instance
>*instance)
> ret = 1;
> goto fail_fw_init;
> }
>- printk(KERN_ERR "megasas:IOC Init cmd success\n");
>+ dev_err(&instance->pdev->dev, "Init cmd success\n");
>
> ret = 0;
>
>@@ -772,7 +772,7 @@ megasas_get_ld_map_info(struct megasas_instance
>*instance)
> cmd = megasas_get_cmd(instance);
>
> if (!cmd) {
>- printk(KERN_DEBUG "megasas: Failed to get cmd for map
>info.\n");
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to
>get cmd for
>+map info.\n");
> return -ENOMEM;
> }
>
>@@ -791,7 +791,7 @@ megasas_get_ld_map_info(struct megasas_instance
>*instance)
> ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
>
> if (!ci) {
>- printk(KERN_DEBUG "Failed to alloc mem for
>ld_map_info\n");
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to
>alloc mem for
>+ld_map_info\n");
> megasas_return_cmd(instance, cmd);
> return -ENOMEM;
> }
>@@ -870,7 +870,7 @@ megasas_sync_map_info(struct megasas_instance
>*instance)
> cmd = megasas_get_cmd(instance);
>
> if (!cmd) {
>- printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
>+ dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to
>get cmd for sync"
> "info.\n");
> return -ENOMEM;
> }
>@@ -1107,7 +1107,7 @@ megasas_init_adapter_fusion(struct
>megasas_instance *instance)
> &fusion->ld_map_phys[i],
> GFP_KERNEL);
> if (!fusion->ld_map[i]) {
>- printk(KERN_ERR "megasas: Could not allocate
>memory "
>+ dev_err(&instance->pdev->dev, "Could not allocate
>memory "
> "for map info\n");
> goto fail_map_info;
> }
>@@ -1200,7 +1200,7 @@ map_cmd_status(struct megasas_cmd_fusion
>*cmd, u8 status, u8 ext_status)
> cmd->scmd->result = DID_IMM_RETRY << 16;
> break;
> default:
>- printk(KERN_DEBUG "megasas: FW status %#x\n", status);
>+ dev_printk(KERN_DEBUG, &cmd->instance->pdev->dev, "FW
>status %#x\n",
>+status);
> cmd->scmd->result = DID_ERROR << 16;
> break;
> }
>@@ -1852,7 +1852,7 @@ megasas_build_io_fusion(struct megasas_instance
>*instance,
> &io_request->SGL, cmd);
>
> if (sge_count > instance->max_num_sge) {
>- printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds
>"
>+ dev_err(&instance->pdev->dev, "Error. sge_count (0x%x)
>exceeds "
> "max (0x%x) allowed\n", sge_count,
> instance->max_num_sge);
> return 1;
>@@ -1886,7 +1886,7 @@ megasas_get_request_descriptor(struct
>megasas_instance *instance, u16 index)
> struct fusion_context *fusion;
>
> if (index >= instance->max_fw_cmds) {
>- printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
>+ dev_err(&instance->pdev->dev, "Invalid SMID (0x%x)request
>for "
> "descriptor for scsi%d\n", index,
> instance->host->host_no);
> return NULL;
>@@ -1930,7 +1930,7 @@ megasas_build_and_issue_cmd_fusion(struct
>megasas_instance *instance,
>
> if (megasas_build_io_fusion(instance, scmd, cmd)) {
> megasas_return_cmd_fusion(instance, cmd);
>- printk(KERN_ERR "megasas: Error building command.\n");
>+ dev_err(&instance->pdev->dev, "Error building
>command.\n");
> cmd->request_desc = NULL;
> return 1;
> }
>@@ -1940,7 +1940,7 @@ megasas_build_and_issue_cmd_fusion(struct
>megasas_instance *instance,
>
> if (cmd->io_request->ChainOffset != 0 &&
> cmd->io_request->ChainOffset != 0xF)
>- printk(KERN_ERR "megasas: The chain offset value is not "
>+ dev_err(&instance->pdev->dev, "The chain offset value is not
>"
> "correct : %x\n", cmd->io_request->ChainOffset);
>
> /*
>@@ -2028,7 +2028,7 @@ complete_cmd_fusion(struct megasas_instance
>*instance, u32 MSIxIndex)
> if (reply_descript_type ==
> MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
> if (megasas_dbg_lvl == 5)
>- printk(KERN_ERR "\nmegasas: FAST
>Path "
>+ dev_err(&instance->pdev->dev,
>"\nFAST Path "
> "IO Success\n");
> }
> /* Fall thru and complete IO */
>@@ -2193,7 +2193,7 @@ irqreturn_t megasas_isr_fusion(int irq, void *devp)
> else if (fw_state == MFI_STATE_FAULT)
> schedule_work(&instance->work_init);
> } else if (fw_state == MFI_STATE_FAULT) {
>- printk(KERN_WARNING "megaraid_sas:
>Iop2SysDoorbellInt"
>+ dev_warn(&instance->pdev->dev,
>"Iop2SysDoorbellInt"
> "for scsi%d\n", instance->host->host_no);
> schedule_work(&instance->work_init);
> }
>@@ -2290,7 +2290,7 @@ build_mpt_cmd(struct megasas_instance *instance,
>struct megasas_cmd *cmd)
> u16 index;
>
> if (build_mpt_mfi_pass_thru(instance, cmd)) {
>- printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
>+ dev_err(&instance->pdev->dev, "Couldn't build MFI pass thru
>cmd\n");
> return NULL;
> }
>
>@@ -2324,7 +2324,7 @@ megasas_issue_dcmd_fusion(struct
>megasas_instance *instance,
>
> req_desc = build_mpt_cmd(instance, cmd);
> if (!req_desc) {
>- printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
>+ dev_err(&instance->pdev->dev, "Couldn't issue MFI pass thru
>cmd\n");
> return;
> }
> atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_ATTACHED); @@ -
>2436,7 +2436,7 @@ int megasas_wait_for_outstanding_fusion(struct
>megasas_instance *instance,
> fw_state = instance->instancet->read_fw_status_reg(
> instance->reg_set) & MFI_STATE_MASK;
> if (fw_state == MFI_STATE_FAULT) {
>- printk(KERN_WARNING "megasas: Found FW in
>FAULT state,"
>+ dev_warn(&instance->pdev->dev, "Found FW in
>FAULT state,"
> " will reset adapter scsi%d.\n",
> instance->host->host_no);
> retval = 1;
>@@ -2459,7 +2459,7 @@ int megasas_wait_for_outstanding_fusion(struct
>megasas_instance *instance,
> hb_seconds_missed++;
> if (hb_seconds_missed ==
>
>(MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
>- printk(KERN_WARNING "megasas: SR-
>IOV:"
>+ dev_warn(&instance->pdev->dev,
>"SR-IOV:"
> " Heartbeat never completed "
> " while polling during I/O "
> " timeout handling for "
>@@ -2477,7 +2477,7 @@ int megasas_wait_for_outstanding_fusion(struct
>megasas_instance *instance,
> goto out;
>
> if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
>- printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
>+ dev_notice(&instance->pdev->dev, "[%2d]waiting for
>%d "
> "commands to complete for scsi%d\n", i,
> outstanding, instance->host->host_no);
> megasas_complete_cmd_dpc_fusion(
>@@ -2487,7 +2487,7 @@ int megasas_wait_for_outstanding_fusion(struct
>megasas_instance *instance,
> }
>
> if (atomic_read(&instance->fw_outstanding)) {
>- printk("megaraid_sas: pending commands remain after
>waiting, "
>+ dev_err(&instance->pdev->dev, "pending commands remain
>after waiting, "
> "will reset adapter scsi%d.\n",
> instance->host->host_no);
> retval = 1;
>@@ -2553,7 +2553,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> mutex_lock(&instance->reset_mutex);
>
> if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
>- printk(KERN_WARNING "megaraid_sas: Hardware critical
>error, "
>+ dev_warn(&instance->pdev->dev, "Hardware critical error, "
> "returning FAILED for scsi%d.\n",
> instance->host->host_no);
> mutex_unlock(&instance->reset_mutex);
>@@ -2607,7 +2607,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> if (megasas_wait_for_outstanding_fusion(instance, iotimeout,
> &convert)) {
> instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
>- printk(KERN_WARNING "megaraid_sas: resetting fusion "
>+ dev_warn(&instance->pdev->dev, "resetting fusion "
> "adapter scsi%d.\n", instance->host->host_no);
> if (convert)
> iotimeout = 0;
>@@ -2633,7 +2633,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> if (instance->disableOnlineCtrlReset ||
> (abs_state == MFI_STATE_FAULT && !reset_adapter)) {
> /* Reset not supported, kill adapter */
>- printk(KERN_WARNING "megaraid_sas: Reset not
>supported"
>+ dev_warn(&instance->pdev->dev, "Reset not
>supported"
> ", killing adapter scsi%d.\n",
> instance->host->host_no);
> megaraid_sas_kill_hba(instance);
>@@ -2651,7 +2651,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> instance->hb_host_mem->HB.driverCounter)) {
> instance->hb_host_mem-
>>HB.driverCounter =
> instance->hb_host_mem-
>>HB.fwCounter;
>- printk(KERN_WARNING "megasas: SR-
>IOV:"
>+ dev_warn(&instance->pdev->dev,
>"SR-IOV:"
> "Late FW heartbeat update for "
> "scsi%d.\n",
> instance->host->host_no);
>@@ -2667,8 +2667,8 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> abs_state = status_reg &
> MFI_STATE_MASK;
> if (abs_state == MFI_STATE_READY) {
>- printk(KERN_WARNING
>"megasas"
>- ": SR-IOV: FW was found"
>+ dev_warn(&instance->pdev-
>>dev,
>+ "SR-IOV: FW was found"
> "to be in ready state "
> "for scsi%d.\n",
> instance->host->host_no);
>@@ -2677,7 +2677,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> msleep(20);
> }
> if (abs_state != MFI_STATE_READY) {
>- printk(KERN_WARNING "megasas: SR-
>IOV: "
>+ dev_warn(&instance->pdev->dev,
>"SR-IOV: "
> "FW not in ready state after %d"
> " seconds for scsi%d, status_reg = "
> "0x%x.\n",
>@@ -2719,7 +2719,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> host_diag =
> readl(&instance->reg_set-
>>fusion_host_diag);
> if (retry++ == 100) {
>- printk(KERN_WARNING
>"megaraid_sas: "
>+ dev_warn(&instance->pdev->dev,
> "Host diag unlock failed! "
> "for scsi%d\n",
> instance->host->host_no);
>@@ -2742,7 +2742,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> host_diag =
> readl(&instance->reg_set-
>>fusion_host_diag);
> if (retry++ == 1000) {
>- printk(KERN_WARNING
>"megaraid_sas: "
>+ dev_warn(&instance->pdev->dev,
> "Diag reset adapter never "
> "cleared for scsi%d!\n",
> instance->host->host_no);
>@@ -2765,7 +2765,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> instance->reg_set) &
>MFI_STATE_MASK;
> }
> if (abs_state <= MFI_STATE_FW_INIT) {
>- printk(KERN_WARNING "megaraid_sas:
>firmware "
>+ dev_warn(&instance->pdev->dev, "firmware
>"
> "state < MFI_STATE_FW_INIT, state = "
> "0x%x for scsi%d\n", abs_state,
> instance->host->host_no);
>@@ -2774,7 +2774,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
>
> /* Wait for FW to become ready */
> if (megasas_transition_to_ready(instance, 1)) {
>- printk(KERN_WARNING "megaraid_sas: Failed
>to "
>+ dev_warn(&instance->pdev->dev, "Failed to "
> "transition controller to ready "
> "for scsi%d.\n",
> instance->host->host_no);
>@@ -2783,7 +2783,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
>
> megasas_reset_reply_desc(instance);
> if (megasas_ioc_init_fusion(instance)) {
>- printk(KERN_WARNING "megaraid_sas: "
>+ dev_warn(&instance->pdev->dev,
> "megasas_ioc_init_fusion() failed!"
> " for scsi%d\n",
> instance->host->host_no);
>@@ -2808,7 +2808,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> cmd_mfi-
>>context.smid
> -1);
> if (!req_desc) {
>-
> printk(KERN_WARNING
>+ dev_warn(&instance-
>>pdev->dev,
> "req_desc NULL"
> " for scsi%d\n",
> instance-
>>host->host_no);
>@@ -2861,7 +2861,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> }
>
> /* Adapter reset completed successfully */
>- printk(KERN_WARNING "megaraid_sas: Reset "
>+ dev_warn(&instance->pdev->dev, "Reset "
> "successful for scsi%d.\n",
> instance->host->host_no);
>
>@@ -2877,7 +2877,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost,
>int iotimeout)
> goto out;
> }
> /* Reset failed, kill the adapter */
>- printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
>+ dev_warn(&instance->pdev->dev, "Reset failed, killing "
> "adapter scsi%d.\n", instance->host->host_no);
> megaraid_sas_kill_hba(instance);
> instance->skip_heartbeat_timer_del = 1;
Currently few patches are sent for megaraid_sas driver and after applying
those patches, this patch may not apply cleanly. Once those patches are
accepted, I will rebase and send this patch again.
Thanks,
Sumit
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