4 files changed, 37 insertions, 36 deletions
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 3a3ab05e13fd..2dd175f5debd 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -41,19 +41,8 @@ struct aer_capability_regs {
 };
 
 #if defined(CONFIG_PCIEAER)
-/* PCIe port driver needs this function to enable AER */
-int pci_enable_pcie_error_reporting(struct pci_dev *dev);
-int pci_disable_pcie_error_reporting(struct pci_dev *dev);
 int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
 #else
-static inline int pci_enable_pcie_error_reporting(struct pci_dev *dev)
-{
-	return -EINVAL;
-}
-static inline int pci_disable_pcie_error_reporting(struct pci_dev *dev)
-{
-	return -EINVAL;
-}
 static inline int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
 {
 	return -EINVAL;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7d81aff09153..cf6e0b057752 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -468,6 +468,7 @@ struct pci_dev {
 	pci_dev_flags_t dev_flags;
 	atomic_t	enable_cnt;	/* pci_enable_device has been called */
 
+	spinlock_t	pcie_cap_lock;		/* Protects RMW ops in capability accessors */
 	u32		saved_config_space[16]; /* Config space saved at suspend time */
 	struct hlist_head saved_cap_space;
 	struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
@@ -1217,11 +1218,40 @@ int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
-int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
-				       u16 clear, u16 set);
+int pcie_capability_clear_and_set_word_unlocked(struct pci_dev *dev, int pos,
+						u16 clear, u16 set);
+int pcie_capability_clear_and_set_word_locked(struct pci_dev *dev, int pos,
+					      u16 clear, u16 set);
 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
 					u32 clear, u32 set);
 
+/**
+ * pcie_capability_clear_and_set_word - RMW accessor for PCI Express Capability Registers
+ * @dev:	PCI device structure of the PCI Express device
+ * @pos:	PCI Express Capability Register
+ * @clear:	Clear bitmask
+ * @set:	Set bitmask
+ *
+ * Perform a Read-Modify-Write (RMW) operation using @clear and @set
+ * bitmasks on PCI Express Capability Register at @pos. Certain PCI Express
+ * Capability Registers are accessed concurrently in RMW fashion, hence
+ * require locking which is handled transparently to the caller.
+ */
+static inline int pcie_capability_clear_and_set_word(struct pci_dev *dev,
+						     int pos,
+						     u16 clear, u16 set)
+{
+	switch (pos) {
+	case PCI_EXP_LNKCTL:
+	case PCI_EXP_RTCTL:
+		return pcie_capability_clear_and_set_word_locked(dev, pos,
+								 clear, set);
+	default:
+		return pcie_capability_clear_and_set_word_unlocked(dev, pos,
+								   clear, set);
+	}
+}
+
 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
 					   u16 set)
 {
diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h
index 48fabe36509e..8d8fac1626bd 100644
--- a/include/linux/switchtec.h
+++ b/include/linux/switchtec.h
@@ -41,6 +41,7 @@ enum {
 enum switchtec_gen {
 	SWITCHTEC_GEN3,
 	SWITCHTEC_GEN4,
+	SWITCHTEC_GEN5,
 };
 
 struct mrpc_regs {
diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h
index b4b9137f9792..97129a1bbb7d 100644
--- a/include/linux/vgaarb.h
+++ b/include/linux/vgaarb.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: MIT */
+
 /*
  * The VGA aribiter manages VGA space routing and VGA resource decode to
  * allow multiple VGA devices to be used in a system in a safe way.
@@ -5,27 +7,6 @@
  * (C) Copyright 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>
  * (C) Copyright 2007 Paulo R. Zanoni <przanoni@gmail.com>
  * (C) Copyright 2007, 2009 Tiago Vignatti <vignatti@freedesktop.org>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS
- * IN THE SOFTWARE.
- *
  */
 
 #ifndef LINUX_VGA_H
@@ -96,7 +77,7 @@ static inline int vga_client_register(struct pci_dev *pdev,
 static inline int vga_get_interruptible(struct pci_dev *pdev,
 					unsigned int rsrc)
 {
-       return vga_get(pdev, rsrc, 1);
+	return vga_get(pdev, rsrc, 1);
 }
 
 /**
@@ -111,7 +92,7 @@ static inline int vga_get_interruptible(struct pci_dev *pdev,
 static inline int vga_get_uninterruptible(struct pci_dev *pdev,
 					  unsigned int rsrc)
 {
-       return vga_get(pdev, rsrc, 0);
+	return vga_get(pdev, rsrc, 0);
 }
 
 static inline void vga_client_unregister(struct pci_dev *pdev)