diff options
| -rw-r--r-- | drivers/crypto/omap-aes-gcm.c | 2 | ||||
| -rw-r--r-- | drivers/crypto/omap-aes.c | 67 |
2 files changed, 42 insertions, 27 deletions
diff --git a/drivers/crypto/omap-aes-gcm.c b/drivers/crypto/omap-aes-gcm.c index 6da05149b195..e92000846f16 100644 --- a/drivers/crypto/omap-aes-gcm.c +++ b/drivers/crypto/omap-aes-gcm.c @@ -244,7 +244,7 @@ static int omap_aes_gcm_handle_queue(struct omap_aes_dev *dd, err = omap_aes_write_ctrl(dd); if (!err) { - if (dd->in_sg_len && dd->out_sg_len) + if (dd->in_sg_len) err = omap_aes_crypt_dma_start(dd); else omap_aes_gcm_dma_out_callback(dd); diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index d63ab370030e..758c93908fa5 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -269,13 +269,14 @@ static int omap_aes_crypt_dma(struct omap_aes_dev *dd, struct scatterlist *out_sg, int in_sg_len, int out_sg_len) { - struct dma_async_tx_descriptor *tx_in, *tx_out; + struct dma_async_tx_descriptor *tx_in, *tx_out = NULL, *cb_desc; struct dma_slave_config cfg; int ret; if (dd->pio_only) { scatterwalk_start(&dd->in_walk, dd->in_sg); - scatterwalk_start(&dd->out_walk, dd->out_sg); + if (out_sg_len) + scatterwalk_start(&dd->out_walk, dd->out_sg); /* Enable DATAIN interrupt and let it take care of the rest */ @@ -312,34 +313,45 @@ static int omap_aes_crypt_dma(struct omap_aes_dev *dd, /* No callback necessary */ tx_in->callback_param = dd; + tx_in->callback = NULL; /* OUT */ - ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); - if (ret) { - dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", - ret); - return ret; - } + if (out_sg_len) { + ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); + if (ret) { + dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", + ret); + return ret; + } - tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len, - DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - if (!tx_out) { - dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); - return -EINVAL; + tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, + out_sg_len, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!tx_out) { + dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); + return -EINVAL; + } + + cb_desc = tx_out; + } else { + cb_desc = tx_in; } if (dd->flags & FLAGS_GCM) - tx_out->callback = omap_aes_gcm_dma_out_callback; + cb_desc->callback = omap_aes_gcm_dma_out_callback; else - tx_out->callback = omap_aes_dma_out_callback; - tx_out->callback_param = dd; + cb_desc->callback = omap_aes_dma_out_callback; + cb_desc->callback_param = dd; + dmaengine_submit(tx_in); - dmaengine_submit(tx_out); + if (tx_out) + dmaengine_submit(tx_out); dma_async_issue_pending(dd->dma_lch_in); - dma_async_issue_pending(dd->dma_lch_out); + if (out_sg_len) + dma_async_issue_pending(dd->dma_lch_out); /* start DMA */ dd->pdata->trigger(dd, dd->total); @@ -361,11 +373,13 @@ int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) return -EINVAL; } - err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, - DMA_FROM_DEVICE); - if (!err) { - dev_err(dd->dev, "dma_map_sg() error\n"); - return -EINVAL; + if (dd->out_sg_len) { + err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); + if (!err) { + dev_err(dd->dev, "dma_map_sg() error\n"); + return -EINVAL; + } } } @@ -373,8 +387,9 @@ int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) dd->out_sg_len); if (err && !dd->pio_only) { dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); - dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, - DMA_FROM_DEVICE); + if (dd->out_sg_len) + dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); } return err; |