[PATCH] ethdev: allow using devices with shortened PCI addresses

[Bruce Richardson <bruce.richardson@intel.com>]

When using a secondary process, e.g. pdump, not all PCI devices will be
probed correctly if the primary process has allowlisted devices using
the shortened syntax, omitting the initial "0000:" domain. This is due
to the strcmp failing to match a full address with a shortened one.

Fix this issue by comparing the device names/addresses normally and then
having a special case second comparison for devices which start with
"0000:".

Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple process model")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/ethdev/ethdev_driver.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/ethdev/ethdev_driver.c b/lib/ethdev/ethdev_driver.c
index 9afef06431..e5590076c1 100644
--- a/lib/ethdev/ethdev_driver.c
+++ b/lib/ethdev/ethdev_driver.c
@@ -156,6 +156,7 @@ rte_eth_dev_attach_secondary(const char *name)
 	uint16_t i;
 	struct rte_eth_dev *eth_dev = NULL;
 
+
 	/* Synchronize port attachment to primary port creation and release. */
 	rte_spinlock_lock(rte_mcfg_ethdev_get_lock());
 
@@ -165,6 +166,11 @@ rte_eth_dev_attach_secondary(const char *name)
 	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 		if (strcmp(eth_dev_shared_data->data[i].name, name) == 0)
 			break;
+
+		/* for PCI devices, allow specifying name without a leading "0000:" */
+		if (strncmp(name, "0000:", 5) == 0 && /* is PCI address */
+				strcmp(eth_dev_shared_data->data[i].name, &name[5]) == 0)
+			break;
 	}
 	if (i == RTE_MAX_ETHPORTS) {
 		RTE_ETHDEV_LOG_LINE(ERR,
-- 
2.43.0