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path: root/drivers/net/virtio/virtio_pci.c
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Diffstat (limited to 'drivers/net/virtio/virtio_pci.c')
-rw-r--r--drivers/net/virtio/virtio_pci.c65
1 files changed, 48 insertions, 17 deletions
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 6bd22e54..b6a3c80b 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);
+ ret = rte_pci_read_config(dev, &cap, 2, pos);
+ if (ret != 2) {
+ PMD_INIT_LOG(DEBUG,
+ "failed to read pci cap at pos: %x ret %d",
+ pos, ret);
break;
}
@@ -586,7 +588,16 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw)
* 1st byte is cap ID; 2nd byte is the position of next
* cap; next two bytes are the flags.
*/
- uint16_t flags = ((uint16_t *)&cap)[1];
+ uint16_t flags;
+
+ ret = rte_pci_read_config(dev, &flags, sizeof(flags),
+ pos + 2);
+ if (ret != sizeof(flags)) {
+ PMD_INIT_LOG(DEBUG,
+ "failed to read pci cap at pos:"
+ " %x ret %d", pos + 2, ret);
+ break;
+ }
if (flags & PCI_MSIX_ENABLE)
hw->use_msix = VIRTIO_MSIX_ENABLED;
@@ -601,6 +612,14 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw)
goto next;
}
+ ret = rte_pci_read_config(dev, &cap, sizeof(cap), pos);
+ if (ret != sizeof(cap)) {
+ PMD_INIT_LOG(DEBUG,
+ "failed to read pci cap at pos: %x ret %d",
+ pos, ret);
+ break;
+ }
+
PMD_INIT_LOG(DEBUG,
"[%2x] cfg type: %u, bar: %u, offset: %04x, len: %u",
pos, cap.cfg_type, cap.bar, cap.offset, cap.length);
@@ -689,25 +708,37 @@ enum virtio_msix_status
vtpci_msix_detect(struct rte_pci_device *dev)
{
uint8_t pos;
- struct virtio_pci_cap cap;
int ret;
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 VIRTIO_MSIX_NONE;
}
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);
+ uint8_t cap[2];
+
+ ret = rte_pci_read_config(dev, cap, sizeof(cap), pos);
+ if (ret != sizeof(cap)) {
+ PMD_INIT_LOG(DEBUG,
+ "failed to read pci cap at pos: %x ret %d",
+ pos, ret);
break;
}
- if (cap.cap_vndr == PCI_CAP_ID_MSIX) {
- uint16_t flags = ((uint16_t *)&cap)[1];
+ if (cap[0] == PCI_CAP_ID_MSIX) {
+ uint16_t flags;
+
+ ret = rte_pci_read_config(dev, &flags, sizeof(flags),
+ pos + sizeof(cap));
+ if (ret != sizeof(flags)) {
+ PMD_INIT_LOG(DEBUG,
+ "failed to read pci cap at pos:"
+ " %x ret %d", pos + 2, ret);
+ break;
+ }
if (flags & PCI_MSIX_ENABLE)
return VIRTIO_MSIX_ENABLED;
@@ -715,7 +746,7 @@ vtpci_msix_detect(struct rte_pci_device *dev)
return VIRTIO_MSIX_DISABLED;
}
- pos = cap.cap_next;
+ pos = cap[1];
}
return VIRTIO_MSIX_NONE;