[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 <harish.zunjarrao@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla4xxx/ql4_bsg.c b/drivers/scsi/qla4xxx/ql4_bsg.c
index daa2b0f..15032f13 100644
--- a/drivers/scsi/qla4xxx/ql4_bsg.c
+++ b/drivers/scsi/qla4xxx/ql4_bsg.c
@@ -16,36 +16,31 @@
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 (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 (ql4xxx_reset_active(ha)) {
+ ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
+ rval = -EBUSY;
+ goto leave;
}
+ 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 @@
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 @@
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;
+ goto leave;
- if (ha->flash_state != QLFLASH_WAITING)
- return -EBUSY;
-
- 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 (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 (ql4xxx_reset_active(ha)) {
+ ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
+ rval = -EBUSY;
+ goto leave;
}
+ 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 @@
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;
- }
+ 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;
- 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_TO_DEVICE);
-
- if (!rval)
- bsg_job_done(bsg_job, bsg_reply->result,
- bsg_reply->reply_payload_rcv_len);
return rval;
}