From 43f388b02e5c3a10a89f7163f38787a98638eb18 Mon Sep 17 00:00:00 2001 From: Jayamohan Kallickal Date: Fri, 5 Apr 2013 20:38:25 -0700 Subject: [PATCH] [SCSI] be2iscsi: Fix freeing CXN specific driver resources. Free CXN specific resource held by driver when login redirection or connection retry happens. Login redirection was failing because WRB/SGL were not allocated from the CID on which doorbell was rung. Fixed the issue raised by MikeC Signed-off-by: John Soni Jose Signed-off-by: Jayamohan Kallickal Reviewed-by: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/be2iscsi/be_iscsi.c | 15 +++++++ drivers/scsi/be2iscsi/be_main.c | 68 +++++++++++++++++++++----------- drivers/scsi/be2iscsi/be_main.h | 1 + 3 files changed, 62 insertions(+), 22 deletions(-) diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c index 461f859cfbf6..dd5beff92c61 100644 --- a/drivers/scsi/be2iscsi/be_iscsi.c +++ b/drivers/scsi/be2iscsi/be_iscsi.c @@ -990,9 +990,24 @@ static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) { struct beiscsi_hba *phba = beiscsi_ep->phba; + struct beiscsi_conn *beiscsi_conn; beiscsi_put_cid(phba, beiscsi_ep->ep_cid); beiscsi_ep->phba = NULL; + + /** + * Check if any connection resource allocated by driver + * is to be freed.This case occurs when target redirection + * or connection retry is done. + **/ + if (!beiscsi_ep->conn) + return; + + beiscsi_conn = beiscsi_ep->conn; + if (beiscsi_conn->login_in_progress) { + beiscsi_free_mgmt_task_handles(beiscsi_conn); + beiscsi_conn->login_in_progress = 0; + } } /** diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 72e4052238cd..75d7186723c1 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -4065,6 +4065,49 @@ static void beiscsi_clean_port(struct beiscsi_hba *phba) kfree(phba->ep_array); } +/** + * beiscsi_free_mgmt_task_handles()- Free driver CXN resources + * @beiscsi_conn: ptr to the conn to be cleaned up + * + * Free driver mgmt resources binded to CXN. + **/ +void +beiscsi_free_mgmt_task_handles(struct beiscsi_conn *beiscsi_conn) +{ + struct beiscsi_io_task *io_task; + struct beiscsi_hba *phba = beiscsi_conn->phba; + struct hwi_wrb_context *pwrb_context; + struct hwi_controller *phwi_ctrlr; + + phwi_ctrlr = phba->phwi_ctrlr; + pwrb_context = &phwi_ctrlr->wrb_context + [beiscsi_conn->beiscsi_conn_cid + - phba->fw_config.iscsi_cid_start]; + io_task = beiscsi_conn->task->dd_data; + + if (io_task->pwrb_handle) { + memset(io_task->pwrb_handle->pwrb, 0, + sizeof(struct iscsi_wrb)); + free_wrb_handle(phba, pwrb_context, + io_task->pwrb_handle); + io_task->pwrb_handle = NULL; + } + + if (io_task->psgl_handle) { + spin_lock_bh(&phba->mgmt_sgl_lock); + free_mgmt_sgl_handle(phba, + io_task->psgl_handle); + spin_unlock_bh(&phba->mgmt_sgl_lock); + io_task->psgl_handle = NULL; + } + + if (io_task->mtask_addr) + pci_unmap_single(phba->pcidev, + io_task->mtask_addr, + io_task->mtask_data_count, + PCI_DMA_TODEVICE); +} + /** * beiscsi_cleanup_task()- Free driver resources of the task * @task: ptr to the iscsi task @@ -4104,27 +4147,8 @@ static void beiscsi_cleanup_task(struct iscsi_task *task) io_task->psgl_handle = NULL; } } else { - if (!beiscsi_conn->login_in_progress) { - if (io_task->pwrb_handle) { - free_wrb_handle(phba, pwrb_context, - io_task->pwrb_handle); - io_task->pwrb_handle = NULL; - } - if (io_task->psgl_handle) { - spin_lock(&phba->mgmt_sgl_lock); - free_mgmt_sgl_handle(phba, - io_task->psgl_handle); - spin_unlock(&phba->mgmt_sgl_lock); - io_task->psgl_handle = NULL; - } - if (io_task->mtask_addr) { - pci_unmap_single(phba->pcidev, - io_task->mtask_addr, - io_task->mtask_data_count, - PCI_DMA_TODEVICE); - io_task->mtask_addr = 0; - } - } + if (!beiscsi_conn->login_in_progress) + beiscsi_free_mgmt_task_handles(beiscsi_conn); } } @@ -4237,6 +4261,7 @@ static int beiscsi_alloc_pdu(struct iscsi_task *task, uint8_t opcode) } else { io_task->scsi_cmnd = NULL; if ((opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGIN) { + beiscsi_conn->task = task; if (!beiscsi_conn->login_in_progress) { spin_lock(&phba->mgmt_sgl_lock); io_task->psgl_handle = (struct sgl_handle *) @@ -4279,7 +4304,6 @@ static int beiscsi_alloc_pdu(struct iscsi_task *task, uint8_t opcode) io_task->pwrb_handle = beiscsi_conn->plogin_wrb_handle; } - beiscsi_conn->task = task; } else { spin_lock(&phba->mgmt_sgl_lock); io_task->psgl_handle = alloc_mgmt_sgl_handle(phba); diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h index e53d08777c01..b098b5b7d188 100644 --- a/drivers/scsi/be2iscsi/be_main.h +++ b/drivers/scsi/be2iscsi/be_main.h @@ -749,6 +749,7 @@ void free_mgmt_sgl_handle(struct beiscsi_hba *phba, struct sgl_handle *psgl_handle); void beiscsi_process_all_cqs(struct work_struct *work); +void beiscsi_free_mgmt_task_handles(struct beiscsi_conn *beiscsi_conn); static inline bool beiscsi_error(struct beiscsi_hba *phba) { -- 2.20.1