net: chelsio: cxgb3: check the return value of pci_find_capability()

The function pci_find_capability() in t3_prep_adapter() can fail, so its return value should be checked. Fixes: 4d22de3 ("Add support for the latest 1G/10G Chelsio adapter, T3") Reported-by: TOTE Robot <[email protected]> Signed-off-by: Jia-Ju Bai <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Feb 25, 2022 · 767b982 · 767b982
1 parent 5a83dd1
commit 767b982
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c b/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
@@ -3613,6 +3613,8 @@ int t3_prep_adapter(struct adapter *adapter, const struct adapter_info *ai,
 	    MAC_STATS_ACCUM_SECS : (MAC_STATS_ACCUM_SECS * 10);
 	adapter->params.pci.vpd_cap_addr =
 	    pci_find_capability(adapter->pdev, PCI_CAP_ID_VPD);
+	if (!adapter->params.pci.vpd_cap_addr)
+		return -ENODEV;
 	ret = get_vpd_params(adapter, &adapter->params.vpd);
 	if (ret < 0)
 		return ret;