From ef7830bb62c9edf34fc4e849a53d7e87bf51de4a Mon Sep 17 00:00:00 2001 From: Harish Zunjarrao Date: Mon, 1 Aug 2011 03:26:14 -0700 Subject: [PATCH] [SCSI] qla4xxx: Code cleanup for read/update flash using BSG - Corrected return status - Added reset active check - Removed unused dma_map_sg calls - Added debug prints on failure Signed-off-by: Harish Zunjarrao Signed-off-by: Vikas Chaudhary Reviewed-by: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/qla4xxx/ql4_bsg.c | 128 ++++++++++++++------------------- drivers/scsi/qla4xxx/ql4_def.h | 10 +++ 2 files changed, 65 insertions(+), 73 deletions(-) diff --git a/drivers/scsi/qla4xxx/ql4_bsg.c b/drivers/scsi/qla4xxx/ql4_bsg.c index daa2b0f8e309..15032f130f22 100644 --- a/drivers/scsi/qla4xxx/ql4_bsg.c +++ b/drivers/scsi/qla4xxx/ql4_bsg.c @@ -16,36 +16,31 @@ qla4xxx_read_flash(struct bsg_job *bsg_job) struct scsi_qla_host *ha = to_qla_host(host); struct iscsi_bsg_reply *bsg_reply = bsg_job->reply; struct iscsi_bsg_request *bsg_req = bsg_job->request; - uint32_t sg_cnt; uint32_t offset = 0; uint32_t length = 0; dma_addr_t flash_dma; uint8_t *flash = NULL; - int rval = 0; + int rval = -EINVAL; bsg_reply->reply_payload_rcv_len = 0; if (unlikely(pci_channel_offline(ha->pdev))) - return -EINVAL; + goto leave; - if (ha->flash_state != QLFLASH_WAITING) - return -EBUSY; - - /* TODO: Add check for adapter online, reset active?? */ - sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list, - bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE); - - if (!sg_cnt) - return -ENOMEM; + if (ql4xxx_reset_active(ha)) { + ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__); + rval = -EBUSY; + goto leave; + } - if (sg_cnt != bsg_job->reply_payload.sg_cnt) { - ql4_printk(KERN_ERR, ha, "dma mapping resulted in different" - " sg counts, sg_cnt: %x dma_sg_cnt: %x\n", - bsg_job->reply_payload.sg_cnt, sg_cnt); - rval = -EAGAIN; - goto unmap_sg; + if (ha->flash_state != QLFLASH_WAITING) { + ql4_printk(KERN_ERR, ha, "%s: another flash operation " + "active\n", __func__); + rval = -EBUSY; + goto leave; } + ha->flash_state = QLFLASH_READING; offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1]; length = bsg_job->reply_payload.payload_len; @@ -55,31 +50,27 @@ qla4xxx_read_flash(struct bsg_job *bsg_job) ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for flash " "data\n", __func__); rval = -ENOMEM; - goto unmap_sg; + goto leave; } - ha->flash_state = QLFLASH_READING; - if (qla4xxx_get_flash(ha, flash_dma, offset, length)) - bsg_reply->result = (DID_ERROR << 16); - else { - sg_copy_from_buffer(bsg_job->reply_payload.sg_list, - bsg_job->reply_payload.sg_cnt, - flash, length); - - bsg_reply->result = DID_OK; - bsg_reply->reply_payload_rcv_len = length; + rval = qla4xxx_get_flash(ha, flash_dma, offset, length); + if (rval) { + ql4_printk(KERN_ERR, ha, "%s: get flash failed\n", __func__); + bsg_reply->result = DID_ERROR << 16; + rval = -EIO; + } else { + bsg_reply->reply_payload_rcv_len = + sg_copy_from_buffer(bsg_job->reply_payload.sg_list, + bsg_job->reply_payload.sg_cnt, + flash, length); + bsg_reply->result = DID_OK << 16; } - if (flash) - dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma); - + bsg_job_done(bsg_job, bsg_reply->result, + bsg_reply->reply_payload_rcv_len); + dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma); +leave: ha->flash_state = QLFLASH_WAITING; -unmap_sg: - dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list, - bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE); - if (!rval) - bsg_job_done(bsg_job, bsg_reply->result, - bsg_reply->reply_payload_rcv_len); return rval; } @@ -90,36 +81,32 @@ qla4xxx_update_flash(struct bsg_job *bsg_job) struct scsi_qla_host *ha = to_qla_host(host); struct iscsi_bsg_reply *bsg_reply = bsg_job->reply; struct iscsi_bsg_request *bsg_req = bsg_job->request; - uint32_t sg_cnt; uint32_t length = 0; uint32_t offset = 0; uint32_t options = 0; dma_addr_t flash_dma; uint8_t *flash = NULL; - int rval = 0; + int rval = -EINVAL; bsg_reply->reply_payload_rcv_len = 0; if (unlikely(pci_channel_offline(ha->pdev))) - return -EINVAL; - - if (ha->flash_state != QLFLASH_WAITING) - return -EBUSY; + goto leave; - sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list, - bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE); - - if (!sg_cnt) - return -ENOMEM; + if (ql4xxx_reset_active(ha)) { + ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__); + rval = -EBUSY; + goto leave; + } - if (sg_cnt != bsg_job->request_payload.sg_cnt) { - ql4_printk(KERN_ERR, ha, "dma mapping resulted in different " - "sg counts request_sg_cnt: %x dma_request_sg_cnt: " - "%x\n", bsg_job->request_payload.sg_cnt, sg_cnt); - rval = -EAGAIN; - goto unmap_sg; + if (ha->flash_state != QLFLASH_WAITING) { + ql4_printk(KERN_ERR, ha, "%s: another flash operation " + "active\n", __func__); + rval = -EBUSY; + goto leave; } + ha->flash_state = QLFLASH_WRITING; length = bsg_job->request_payload.payload_len; offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1]; options = bsg_req->rqst_data.h_vendor.vendor_cmd[2]; @@ -130,30 +117,25 @@ qla4xxx_update_flash(struct bsg_job *bsg_job) ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for flash " "data\n", __func__); rval = -ENOMEM; - goto unmap_sg; + goto leave; } - ha->flash_state = QLFLASH_WRITING; sg_copy_to_buffer(bsg_job->request_payload.sg_list, bsg_job->request_payload.sg_cnt, flash, length); - if (qla4xxx_set_flash(ha, flash_dma, offset, length, options)) - bsg_reply->result = (DID_ERROR << 16); - else { - bsg_reply->result = DID_OK; - bsg_reply->reply_payload_rcv_len = length; - } - - if (flash) - dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma); + rval = qla4xxx_set_flash(ha, flash_dma, offset, length, options); + if (rval) { + ql4_printk(KERN_ERR, ha, "%s: set flash failed\n", __func__); + bsg_reply->result = DID_ERROR << 16; + rval = -EIO; + } else + bsg_reply->result = DID_OK << 16; + + bsg_job_done(bsg_job, bsg_reply->result, + bsg_reply->reply_payload_rcv_len); + dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma); +leave: ha->flash_state = QLFLASH_WAITING; -unmap_sg: - dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list, - bsg_job->reply_payload.sg_cnt, DMA_TO_DEVICE); - - if (!rval) - bsg_job_done(bsg_job, bsg_reply->result, - bsg_reply->reply_payload_rcv_len); return rval; } diff --git a/drivers/scsi/qla4xxx/ql4_def.h b/drivers/scsi/qla4xxx/ql4_def.h index 90dc621a926a..74c71af7cb5d 100644 --- a/drivers/scsi/qla4xxx/ql4_def.h +++ b/drivers/scsi/qla4xxx/ql4_def.h @@ -803,6 +803,16 @@ static inline void ql4xxx_unlock_drvr(struct scsi_qla_host *a) ql4xxx_sem_unlock(a, QL4022_DRVR_SEM_MASK); } +static inline int ql4xxx_reset_active(struct scsi_qla_host *ha) +{ + return test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) || + test_bit(DPC_RESET_HA, &ha->dpc_flags) || + test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || + test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) || + test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags); + +} /*---------------------------------------------------------------------------*/ /* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */ -- 2.20.1