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usb: cdns3: Fix issue with using incorrect PCI device function

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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: <stable@vger.kernel.org>
Fixes: 7733f6c32e ("usb: cdns3: Add Cadence USB3 DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20230308124427.311245-1-pawell@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pawel Laszczak 2023-03-08 07:44:27 -05:00 • committed by Greg Kroah-Hartman
commit 0b2a56fe46
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/cdns3/cdns3-pci-wrap.c
View file

@ -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;
}