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net_util: Check descriptor size

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There is no point in queueing an empty descriptor in the list of iovecs.
Let's simply ignore such case and avoid some unnecessary processing.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2021-03-24 10:05:14 +01:00
parent 1cd186c83c
commit 63304d0be7
1 changed files with 2 additions and 2 deletions
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4
net_util/src/queue_pair.rs
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@ -43,7 +43,7 @@ impl TxVirtio {
let mut iovecs = Vec::new();
while let Some(desc) = next_desc {
if !desc.is_write_only() {
if !desc.is_write_only() && desc.len > 0 {
let buf = mem
.get_slice(desc.addr, desc.len as usize)
.map_err(NetQueuePairError::GuestMemory)?
@ -118,7 +118,7 @@ impl RxVirtio {
let mut iovecs = Vec::new();
while let Some(desc) = next_desc {
if desc.is_write_only() {
if desc.is_write_only() && desc.len > 0 {
let buf = mem
.get_slice(desc.addr, desc.len as usize)
.map_err(NetQueuePairError::GuestMemory)?