From: Brian Russell <bruss...@brocade.com> In virtio_read_caps, rte_pci_read_config returns the number of bytes read from PCI config or < 0 on error. If less than the expected number of bytes are read then log the failure and return rather than carrying on with garbage.
Signed-off-by: Brian Russell <bruss...@brocade.com> --- Follow-up from: http://mails.dpdk.org/archives/dev/2017-June/067278.html https://patches.dpdk.org/patch/25056/ drivers/net/virtio/virtio_pci.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c index 6bd22e54a6..a10698aed8 100644 --- a/drivers/net/virtio/virtio_pci.c +++ b/drivers/net/virtio/virtio_pci.c @@ -567,16 +567,18 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw) } ret = rte_pci_read_config(dev, &pos, 1, PCI_CAPABILITY_LIST); - if (ret < 0) { - PMD_INIT_LOG(DEBUG, "failed to read pci capability list"); + if (ret != 1) { + PMD_INIT_LOG(DEBUG, + "failed to read pci capability list, ret %d", ret); return -1; } while (pos) { ret = rte_pci_read_config(dev, &cap, sizeof(cap), pos); - if (ret < 0) { - PMD_INIT_LOG(ERR, - "failed to read pci cap at pos: %x", pos); + if (ret != sizeof(cap)) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos: %x ret %d", + pos, ret); break; } -- 2.18.0
