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Commit 35c46414 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "msm: pcie: validate speed switch request"

parents 6c0f766f bf480f17

drivers/pci/host/pci-msm.c

+10 −1
Original line number Diff line number Diff line
@@ -3724,7 +3724,7 @@ static int msm_pcie_get_resources(struct msm_pcie_dev_t *dev, 
		of_property_read_u32_array(pdev->dev.of_node, "qcom,bw-scale",

				(u32 *)dev->bw_scale, size / sizeof(u32));



		dev->bw_gen_max = size / sizeof(u32);

		dev->bw_gen_max = size / sizeof(*dev->bw_scale);

	} else {

		PCIE_DBG(dev, "RC%d: bandwidth scaling is not supported\n",

			dev->rc_idx);
@@ -6450,6 +6450,15 @@ int msm_pcie_set_link_bandwidth(struct pci_dev *pci_dev, u16 target_link_speed, 


	pcie_dev = PCIE_BUS_PRIV_DATA(root_pci_dev->bus);



	if (target_link_speed > pcie_dev->bw_gen_max ||

		(pcie_dev->target_link_speed &&

		target_link_speed > pcie_dev->target_link_speed)) {

		PCIE_DBG(pcie_dev,

			"PCIe: RC%d: invalid target link speed: %d\n",

			pcie_dev->rc_idx, target_link_speed);

		return -EINVAL;

	}



	pcie_capability_read_word(root_pci_dev, PCI_EXP_LNKSTA, &link_status);



	current_link_speed = link_status & PCI_EXP_LNKSTA_CLS;