diff options
Diffstat (limited to 'package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch b/package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch new file mode 100644 index 0000000000..cae20f5dc3 --- /dev/null +++ b/package/kernel/mac80211/patches/build/101-backport-add-pci_disable_link_state-wrapper-with-ret.patch @@ -0,0 +1,43 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Mon, 28 Oct 2019 15:20:40 +0100 +Subject: [PATCH] backport: add pci_disable_link_state wrapper with return code + +The signature of pci_disable_link_state was changed to indicate if the state +was successfully disabled. Since the old version did not have this, add a +wrapper which checks the pcie register to determine the return code + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/backport-include/linux/pci.h ++++ b/backport-include/linux/pci.h +@@ -236,4 +236,29 @@ static inline struct pci_dev *pcie_find_ + (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX) + #endif + ++#if LINUX_VERSION_IS_LESS(5,3,0) ++ ++static inline int ++LINUX_BACKPORT(pci_disable_link_state)(struct pci_dev *pdev, int state) ++{ ++ u16 aspmc; ++ ++ pci_disable_link_state(pdev, state); ++ ++ pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &aspmc); ++ if ((state & PCIE_LINK_STATE_L0S) && ++ (aspmc & PCI_EXP_LNKCTL_ASPM_L0S)) ++ return -EPERM; ++ ++ if ((state & PCIE_LINK_STATE_L1) && ++ (aspmc & PCI_EXP_LNKCTL_ASPM_L1)) ++ return -EPERM; ++ ++ return 0; ++} ++ ++#define pci_disable_link_state LINUX_BACKPORT(pci_disable_link_state) ++ ++#endif ++ + #endif /* _BACKPORT_LINUX_PCI_H */ |