target/linux/generic/pending-4.14/811-pci_disable_usb_common_quirks.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Subject: debloat: disable common USB quirks
   3
   4 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   5 ---
   6  drivers/usb/host/pci-quirks.c | 16 ++++++++++++++++
   7  drivers/usb/host/pci-quirks.h | 18 +++++++++++++++++-
   8  include/linux/usb/hcd.h       |  7 +++++++
   9  3 files changed, 40 insertions(+), 1 deletion(-)
  10
  11 --- a/drivers/usb/host/pci-quirks.c
  12 +++ b/drivers/usb/host/pci-quirks.c
  13 @@ -107,6 +107,8 @@ struct amd_chipset_type {
  14         u8 rev;
  15  };
  16
  17 +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
  18 +
  19  static struct amd_chipset_info {
  20         struct pci_dev  *nb_dev;
  21         struct pci_dev  *smbus_dev;
  22 @@ -511,6 +513,10 @@ void usb_amd_dev_put(void)
  23  }
  24  EXPORT_SYMBOL_GPL(usb_amd_dev_put);
  25
  26 +#endif /* CONFIG_PCI_DISABLE_COMMON_QUIRKS */
  27 +
  28 +#if IS_ENABLED(CONFIG_USB_UHCI_HCD)
  29 +
  30  /*
  31   * Make sure the controller is completely inactive, unable to
  32   * generate interrupts or do DMA.
  33 @@ -590,8 +596,17 @@ reset_needed:
  34         uhci_reset_hc(pdev, base);
  35         return 1;
  36  }
  37 +#else
  38 +int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base)
  39 +{
  40 +       return 0;
  41 +}
  42 +
  43 +#endif
  44  EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
  45
  46 +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
  47 +
  48  static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
  49  {
  50         u16 cmd;
  51 @@ -1178,3 +1193,4 @@ bool usb_xhci_needs_pci_reset(struct pci
  52         return false;
  53  }
  54  EXPORT_SYMBOL_GPL(usb_xhci_needs_pci_reset);
  55 +#endif
  56 --- a/drivers/usb/host/pci-quirks.h
  57 +++ b/drivers/usb/host/pci-quirks.h
  58 @@ -5,6 +5,9 @@
  59  #ifdef CONFIG_USB_PCI
  60  void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
  61  int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
  62 +#endif  /* CONFIG_USB_PCI */
  63 +
  64 +#if defined(CONFIG_USB_PCI) && !defined(CONFIG_PCI_DISABLE_COMMON_QUIRKS)
  65  int usb_amd_find_chipset_info(void);
  66  int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev);
  67  bool usb_amd_hang_symptom_quirk(void);
  68 @@ -19,12 +22,26 @@ void sb800_prefetch(struct device *dev,
  69  bool usb_xhci_needs_pci_reset(struct pci_dev *pdev);
  70  #else
  71  struct pci_dev;
  72 +static inline int usb_amd_find_chipset_info(void)
  73 +{
  74 +       return 0;
  75 +}
  76 +static inline bool usb_amd_hang_symptom_quirk(void)
  77 +{
  78 +       return false;
  79 +}
  80 +static inline bool usb_amd_prefetch_quirk(void)
  81 +{
  82 +       return false;
  83 +}
  84  static inline void usb_amd_quirk_pll_disable(void) {}
  85  static inline void usb_amd_quirk_pll_enable(void) {}
  86  static inline void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev) {}
  87  static inline void usb_amd_dev_put(void) {}
  88  static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
  89  static inline void sb800_prefetch(struct device *dev, int on) {}
  90 +static inline void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev) {}
  91 +static inline bool usb_xhci_needs_pci_reset(struct pci_dev *pdev) {}
  92  #endif  /* CONFIG_USB_PCI */
  93
  94  #endif  /*  __LINUX_USB_PCI_QUIRKS_H  */
  95 --- a/include/linux/usb/hcd.h
  96 +++ b/include/linux/usb/hcd.h
  97 @@ -465,7 +465,14 @@ extern int usb_hcd_pci_probe(struct pci_
  98  extern void usb_hcd_pci_remove(struct pci_dev *dev);
  99  extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 100
 101 +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
 102  extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
 103 +#else
 104 +static inline int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev)
 105 +{
 106 +       return 0;
 107 +}
 108 +#endif
 109
 110  #ifdef CONFIG_PM
 111  extern const struct dev_pm_ops usb_hcd_pci_pm_ops;