From 0b2a56fe465914309cf6e632c8d7f7c68c898130 Mon Sep 17 00:00:00 2001 From: Pawel Laszczak Date: Wed, 8 Mar 2023 07:44:27 -0500 Subject: [PATCH] usb: cdns3: Fix issue with using incorrect PCI device function commit 1272fd652a226ccb34e9f47371b6121948048438 upstream. PCI based platform can have more than two PCI functions. USBSS PCI Glue driver during initialization should consider only DRD/HOST/DEVICE PCI functions and all other should be ignored. This patch adds additional condition which causes that only DRD and HOST/DEVICE function will be accepted. cc: Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") Signed-off-by: Pawel Laszczak Link: https://lore.kernel.org/r/20230308124427.311245-1-pawell@cadence.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/cdns3/cdns3-pci-wrap.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/cdns3/cdns3-pci-wrap.c b/drivers/usb/cdns3/cdns3-pci-wrap.c index b0a29efe7d31..14878e3f8fbf 100644 --- a/drivers/usb/cdns3/cdns3-pci-wrap.c +++ b/drivers/usb/cdns3/cdns3-pci-wrap.c @@ -60,6 +60,11 @@ static struct pci_dev *cdns3_get_second_fun(struct pci_dev *pdev) return NULL; } + if (func->devfn != PCI_DEV_FN_HOST_DEVICE && + func->devfn != PCI_DEV_FN_OTG) { + return NULL; + } + return func; }