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etraxfs_dma: Dont forward zero-length payload to clients

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
Edgar E. Iglesias 2016-02-16 12:42:49 +01:00
parent 586d1a99ff
commit c3bce9d5f9
1 changed files with 8 additions and 5 deletions
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13
hw/dma/etraxfs_dma.c
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@ -440,13 +440,16 @@ static int channel_out_run(struct fs_dma_ctrl *ctrl, int c)
D(printf("channel %d pushes %x %u bytes eop=%u\n", c,
saved_data_buf, len, out_eop));
if (ctrl->channels[c].client->client.push)
ctrl->channels[c].client->client.push(
ctrl->channels[c].client->client.opaque,
buf, len, out_eop);
else
if (ctrl->channels[c].client->client.push) {
if (len > 0) {
ctrl->channels[c].client->client.push(
ctrl->channels[c].client->client.opaque,
buf, len, out_eop);
}
} else {
printf("WARNING: DMA ch%d dataloss,"
" no attached client.\n", c);
}
saved_data_buf += len;