Commit a5aadd04 authored Nov 14, 2019 by Tony Truong

msm: pcie: check root pci dev is valid in msm_pcie_set_link_bandwidth



It's possible no root PCI device will be found given a child PCI
device. Add a check to make sure root PCI device is valid in
msm_pcie_set_link_bandwidth.

Change-Id: If6bbf3ec5dbd1475b2860c2532799e2b4873e75b
Signed-off-by: Tony Truong <truong@codeaurora.org>

parent 6da887cb

drivers/pci/host/pci-msm.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -6230,6 +6230,9 @@ int msm_pcie_set_link_bandwidth(struct pci_dev *pci_dev, u16 target_link_speed,
		return -EINVAL;

		root_pci_dev = pci_find_pcie_root_port(pci_dev);
		if (!root_pci_dev)
		return -ENODEV;

		pcie_dev = PCIE_BUS_PRIV_DATA(root_pci_dev->bus);

		pcie_capability_read_word(root_pci_dev, PCI_EXP_LNKSTA, &link_status);