diff options
Diffstat (limited to 'drivers/crypto/talitos.c')
| -rw-r--r-- | drivers/crypto/talitos.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index b44f4ddc565c..a3d2e9b88c41 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -338,20 +338,29 @@ DEF_TALITOS_DONE(ch1_3, TALITOS_ISR_CH_1_3_DONE) static u32 current_desc_hdr(struct device *dev, int ch) { struct talitos_private *priv = dev_get_drvdata(dev); - int tail = priv->chan[ch].tail; + int tail, iter; dma_addr_t cur_desc; - cur_desc = in_be32(priv->chan[ch].reg + TALITOS_CDPR_LO); + cur_desc = ((u64)in_be32(priv->chan[ch].reg + TALITOS_CDPR)) << 32; + cur_desc |= in_be32(priv->chan[ch].reg + TALITOS_CDPR_LO); - while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) { - tail = (tail + 1) & (priv->fifo_len - 1); - if (tail == priv->chan[ch].tail) { + if (!cur_desc) { + dev_err(dev, "CDPR is NULL, giving up search for offending descriptor\n"); + return 0; + } + + tail = priv->chan[ch].tail; + + iter = tail; + while (priv->chan[ch].fifo[iter].dma_desc != cur_desc) { + iter = (iter + 1) & (priv->fifo_len - 1); + if (iter == tail) { dev_err(dev, "couldn't locate current descriptor\n"); return 0; } } - return priv->chan[ch].fifo[tail].desc->hdr; + return priv->chan[ch].fifo[iter].desc->hdr; } /* |