diff mbox series

[v10,02/19] bus/pci: fix PCI address compare

Message ID 20180709033706.27858-3-qi.z.zhang@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show
Series enable hotplug on multi-process | expand

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail Compilation issues

Commit Message

Zhang, Qi Z July 9, 2018, 3:36 a.m. UTC
When use memcmp to compare two PCI address, sizeof(struct rte_pci_addr)
is 4 bytes aligned, and it is 8. While only 7 byte of struct rte_pci_addr
is valid. So compare the 8th byte will cause the unexpected result, which
happens when repeatedly attach/detach a device.

Fixes: c752998b5e2e ("pci: introduce library and driver")
Cc: stable@dpdk.org

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/bus/pci/linux/pci_vfio.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c
index aeeaa9ed8..dd25c3542 100644
--- a/drivers/bus/pci/linux/pci_vfio.c
+++ b/drivers/bus/pci/linux/pci_vfio.c
@@ -43,6 +43,17 @@  static struct rte_tailq_elem rte_vfio_tailq = {
 };
 EAL_REGISTER_TAILQ(rte_vfio_tailq)
 
+/* Compair two pci address */
+static int pci_addr_cmp(struct rte_pci_addr *addr1, struct rte_pci_addr *addr2)
+{
+	if (addr1->domain == addr2->domain &&
+		addr1->bus == addr2->bus &&
+		addr1->devid == addr2->devid &&
+		addr1->function == addr2->function)
+		return 0;
+	return 1;
+}
+
 int
 pci_vfio_read_config(const struct rte_intr_handle *intr_handle,
 		    void *buf, size_t len, off_t offs)
@@ -642,7 +653,7 @@  pci_vfio_unmap_resource(struct rte_pci_device *dev)
 	vfio_res_list = RTE_TAILQ_CAST(rte_vfio_tailq.head, mapped_pci_res_list);
 	/* Get vfio_res */
 	TAILQ_FOREACH(vfio_res, vfio_res_list, next) {
-		if (memcmp(&vfio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
+		if (pci_addr_cmp(&vfio_res->pci_addr, &dev->addr))
 			continue;
 		break;
 	}