[SCSI] zfcp: Remove unnecessary default case and assignments

enum dma_data_direction only has the 4 values DMA_BIDIRECTIONAL,
DMA_TO_DEVICE, DMA_FROM_DEVICE and DMA_NONE. No need to have the
default case. While changing this, setup sbtype in one place to make
sparse happy.

The default value of retval is already -EIO, so remove the
additional assignment for these two cases.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 74dee32..8411730 100644 (file)
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -2314,7 +2314,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
 {
        struct zfcp_fsf_req *req;
        struct fcp_cmnd_iu *fcp_cmnd_iu;
-       unsigned int sbtype;
+       unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
        int real_bytes, retval = -EIO;
        struct zfcp_adapter *adapter = unit->port->adapter;
 
@@ -2356,11 +2356,9 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
        switch (scsi_cmnd->sc_data_direction) {
        case DMA_NONE:
                req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
-               sbtype = SBAL_FLAGS0_TYPE_READ;
                break;
        case DMA_FROM_DEVICE:
                req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
-               sbtype = SBAL_FLAGS0_TYPE_READ;
                fcp_cmnd_iu->rddata = 1;
                break;
        case DMA_TO_DEVICE:
@@ -2369,8 +2367,6 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
                fcp_cmnd_iu->wddata = 1;
                break;
        case DMA_BIDIRECTIONAL:
-       default:
-               retval = -EIO;
                goto failed_scsi_cmnd;
        }
 
@@ -2394,9 +2390,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
                                             scsi_sglist(scsi_cmnd),
                                             FSF_MAX_SBALS_PER_REQ);
        if (unlikely(real_bytes < 0)) {
-               if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
-                       retval = -EIO;
-               else {
+               if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
                        dev_err(&adapter->ccw_device->dev,
                                "Oversize data package, unit 0x%016Lx "
                                "on port 0x%016Lx closed\n",