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IB/srpt: Introduce target_reverse_dma_direction() 

Use the function target_reverse_dma_direction() instead of
reimplementing it.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2016-02-11 11:05:01 -08:00 committed by Doug Ledford
parent 33912d7348
commit 671ec1b2d3
1 changed files with 2 additions and 15 deletions
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17
drivers/infiniband/ulp/srpt/ib_srpt.c
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@ -96,19 +96,6 @@ static int srpt_queue_status(struct se_cmd *cmd);
static void srpt_recv_done(struct ib_cq *cq, struct ib_wc *wc);
static void srpt_send_done(struct ib_cq *cq, struct ib_wc *wc);
/**
* opposite_dma_dir() - Swap DMA_TO_DEVICE and DMA_FROM_DEVICE.
*/
static inline
enum dma_data_direction opposite_dma_dir(enum dma_data_direction dir)
{
switch (dir) {
case DMA_TO_DEVICE: return DMA_FROM_DEVICE;
case DMA_FROM_DEVICE: return DMA_TO_DEVICE;
default: return dir;
}
}
static enum rdma_ch_state
srpt_set_ch_state(struct srpt_rdma_ch *ch, enum rdma_ch_state new_state)
{
@ -1049,7 +1036,7 @@ static void srpt_unmap_sg_to_ib_sge(struct srpt_rdma_ch *ch,
dir = ioctx->cmd.data_direction;
BUG_ON(dir == DMA_NONE);
ib_dma_unmap_sg(ch->sport->sdev->device, sg, ioctx->sg_cnt,
opposite_dma_dir(dir));
target_reverse_dma_direction(&ioctx->cmd));
ioctx->mapped_sg_count = 0;
}
}
@ -1086,7 +1073,7 @@ static int srpt_map_sg_to_ib_sge(struct srpt_rdma_ch *ch,
ioctx->sg_cnt = sg_cnt = cmd->t_data_nents;
count = ib_dma_map_sg(ch->sport->sdev->device, sg, sg_cnt,
opposite_dma_dir(dir));
target_reverse_dma_direction(cmd));
if (unlikely(!count))
return -EAGAIN;