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authorEdgar E. Iglesias <edgar.iglesias@xilinx.com>2016-02-16 12:42:49 +0100
committerEdgar E. Iglesias <edgar.iglesias@xilinx.com>2016-02-20 00:17:48 +0100
commitc3bce9d5f986bc22b0692a8fa9d26ce6d304375c (patch)
tree43c3c4ae44721518b0f1be0b874fa7a0798ddfca /hw/dma
parent586d1a99ff1253ac97c07459743e952abfff2a54 (diff)
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etraxfs_dma: Dont forward zero-length payload to clients
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Diffstat (limited to 'hw/dma')
-rw-r--r--hw/dma/etraxfs_dma.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/hw/dma/etraxfs_dma.c b/hw/dma/etraxfs_dma.c
index 9cbb165..d5650eb 100644
--- a/hw/dma/etraxfs_dma.c
+++ b/hw/dma/etraxfs_dma.c
@@ -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;