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Merge pull request #11321 from bergzand/pr/mrf24j40/fix_empty_element

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drivers/mrf24j40: don't load data if iol->iol_len == 0
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MichelRottleuthner 2019-04-01 17:09:15 +02:00 committed by GitHub
commit d77b8e1f52
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1 changed files with 10 additions and 6 deletions
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16
drivers/mrf24j40/mrf24j40_netdev.c
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@ -71,13 +71,17 @@ static int _send(netdev_t *netdev, const iolist_t *iolist)
/* load packet data into FIFO */
for (const iolist_t *iol = iolist; iol; iol = iol->iol_next) {
/* current packet data + FCS too long */
if ((len + iol->iol_len + 2) > IEEE802154_FRAME_LEN_MAX) {
DEBUG("[mrf24j40] error: packet too large (%u byte) to be send\n",
(unsigned)len + 2);
return -EOVERFLOW;
/* Check if there is data to copy, prevents assertion failure in the
* SPI peripheral if there is no data to copy */
if (iol->iol_len) {
/* current packet data + FCS too long */
if ((len + iol->iol_len + 2) > IEEE802154_FRAME_LEN_MAX) {
DEBUG("[mrf24j40] error: packet too large (%u byte) to be send\n",
(unsigned)len + 2);
return -EOVERFLOW;
}
len = mrf24j40_tx_load(dev, iol->iol_base, iol->iol_len, len);
}
len = mrf24j40_tx_load(dev, iol->iol_base, iol->iol_len, len);
/* only on first iteration: */
if (iol == iolist) {
dev->header_len = len;