8 files changed, 103 insertions, 46 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 00b655f117a7..94e3223b2bf4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6465,19 +6465,52 @@ F:	drivers/pci/
 F:      include/linux/pci*
 F:      arch/x86/pci/
 
+PCI DRIVER FOR IMX6
+M:      Richard Zhu <r65037@freescale.com>
+M:      Shawn Guo <shawn.guo@linaro.org>
+L:      linux-pci@vger.kernel.org
+L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:      Maintained
+F:      drivers/pci/host/*imx6*
+
+PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
+M:      Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+M:      Jason Cooper <jason@lakedaemon.net>
+L:      linux-pci@vger.kernel.org
+L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:      Maintained
+F:      drivers/pci/host/*mvebu*
+
 PCI DRIVER FOR NVIDIA TEGRA
 M:      Thierry Reding <thierry.reding@gmail.com>
 L:      linux-tegra@vger.kernel.org
+L:      linux-pci@vger.kernel.org
 S:      Supported
 F:      Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
 F:      drivers/pci/host/pci-tegra.c
 
+PCI DRIVER FOR RENESAS R-CAR
+M:      Simon Horman <horms@verge.net.au>
+L:      linux-pci@vger.kernel.org
+L:      linux-sh@vger.kernel.org
+S:      Maintained
+F:      drivers/pci/host/*rcar*
+
 PCI DRIVER FOR SAMSUNG EXYNOS
 M:      Jingoo Han <jg1.han@samsung.com>
 L:      linux-pci@vger.kernel.org
+L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+L:      linux-samsung-soc@vger.kernel.org (moderated for non-subscribers)
 S:      Maintained
 F:      drivers/pci/host/pci-exynos.c
 
+PCI DRIVER FOR SYNOPSIS DESIGNWARE
+M:      Mohit Kumar <mohit.kumar@st.com>
+M:      Jingoo Han <jg1.han@samsung.com>
+L:      linux-pci@vger.kernel.org
+S:      Maintained
+F:      drivers/pci/host/*designware*
+
 PCMCIA SUBSYSTEM
 P:      Linux PCMCIA Team
 L:      linux-pcmcia@lists.infradead.org
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index c269e430c760..2aa7b77c7c88 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -447,6 +447,11 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port,
                 *value = 0;
                 break;
 
+        case PCI_INTERRUPT_LINE:
+                /* LINE PIN MIN_GNT MAX_LAT */
+                *value = 0;
+                break;
+
         default:
                 *value = 0xffffffff;
                 return PCIBIOS_BAD_REGISTER_NUMBER;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 9042fdbd7244..25f0bc659164 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -19,6 +19,7 @@
 #include <linux/cpu.h>
 #include <linux/pm_runtime.h>
 #include <linux/suspend.h>
+#include <linux/kexec.h>
 #include "pci.h"
 
 struct pci_dynid {
@@ -288,12 +289,27 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
         int error, node;
         struct drv_dev_and_id ddi = { drv, dev, id };
 
-        /* Execute driver initialization on node where the device's
-           bus is attached to.  This way the driver likely allocates
-           its local memory on the right node without any need to
-           change it. */
+        /*
+         * Execute driver initialization on node where the device is
+         * attached.  This way the driver likely allocates its local memory
+         * on the right node.
+         */
         node = dev_to_node(&dev->dev);
-        if (node >= 0) {
+
+        /*
+         * On NUMA systems, we are likely to call a PF probe function using
+         * work_on_cpu().  If that probe calls pci_enable_sriov() (which
+         * adds the VF devices via pci_bus_add_device()), we may re-enter
+         * this function to call the VF probe function.  Calling
+         * work_on_cpu() again will cause a lockdep warning.  Since VFs are
+         * always on the same node as the PF, we can work around this by
+         * avoiding work_on_cpu() when we're already on the correct node.
+         *
+         * Preemption is enabled, so it's theoretically unsafe to use
+         * numa_node_id(), but even if we run the probe function on the
+         * wrong node, it should be functionally correct.
+         */
+        if (node >= 0 && node != numa_node_id()) {
                 int cpu;
 
                 get_online_cpus();
@@ -305,6 +321,7 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
                 put_online_cpus();
         } else
                 error = local_pci_probe(&ddi);
+
         return error;
 }
 
@@ -399,12 +416,17 @@ static void pci_device_shutdown(struct device *dev)
         pci_msi_shutdown(pci_dev);
         pci_msix_shutdown(pci_dev);
 
+#ifdef CONFIG_KEXEC
         /*
-         * Turn off Bus Master bit on the device to tell it to not
-         * continue to do DMA. Don't touch devices in D3cold or unknown states.
+         * If this is a kexec reboot, turn off Bus Master bit on the
+         * device to tell it to not continue to do DMA. Don't touch
+         * devices in D3cold or unknown states.
+         * If it is not a kexec reboot, firmware will hit the PCI
+         * devices with big hammer and stop their DMA any way.
          */
-        if (pci_dev->current_state <= PCI_D3hot)
+        if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
                 pci_clear_master(pci_dev);
+#endif
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 1576851028db..cc9337a71529 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -24,7 +24,7 @@ static void pci_stop_dev(struct pci_dev *dev)
         if (dev->is_added) {
                 pci_proc_detach_device(dev);
                 pci_remove_sysfs_dev_files(dev);
-                device_del(&dev->dev);
+                device_release_driver(&dev->dev);
                 dev->is_added = 0;
         }
 
@@ -34,6 +34,8 @@ static void pci_stop_dev(struct pci_dev *dev)
 
 static void pci_destroy_dev(struct pci_dev *dev)
 {
+        device_del(&dev->dev);
+
         down_write(&pci_bus_sem);
         list_del(&dev->bus_list);
         up_write(&pci_bus_sem);
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index d78d28a733b1..5fd33dc1fe3a 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -198,6 +198,9 @@ extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
 extern size_t vmcoreinfo_size;
 extern size_t vmcoreinfo_max_size;
 
+/* flag to track if kexec reboot is in progress */
+extern bool kexec_in_progress;
+
 int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
                 unsigned long long *crash_size, unsigned long long *crash_base);
 int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 1084a15175e0..eb8078aeadc8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1567,65 +1567,65 @@ enum pci_fixup_pass {
 /* Anonymous variables would be nice... */
 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
                                   class_shift, hook)                    \
-        static const struct pci_fixup __pci_fixup_##name __used         \
+        static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used       \
         __attribute__((__section__(#section), aligned((sizeof(void *)))))    \
                 = { vendor, device, class, class_shift, hook };
 
 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class,            \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,                     \
-                vendor##device##hook, vendor, device, class, class_shift, hook)
+                hook, vendor, device, class, class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class,           \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,                    \
-                vendor##device##hook, vendor, device, class, class_shift, hook)
+                hook, vendor, device, class, class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class,            \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,                     \
-                vendor##device##hook, vendor, device, class, class_shift, hook)
+                hook, vendor, device, class, class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class,           \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,                    \
-                vendor##device##hook, vendor, device, class, class_shift, hook)
+                hook, vendor, device, class, class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class,           \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,                    \
-                resume##vendor##device##hook, vendor, device, class,    \
+                resume##hook, vendor, device, class,    \
                 class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class,     \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,              \
-                resume_early##vendor##device##hook, vendor, device,     \
+                resume_early##hook, vendor, device,     \
                 class, class_shift, hook)
 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class,          \
                                          class_shift, hook)             \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,                   \
-                suspend##vendor##device##hook, vendor, device, class,   \
+                suspend##hook, vendor, device, class,   \
                 class_shift, hook)
 
 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)                   \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,                     \
-                vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
+                hook, vendor, device, PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)                  \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,                    \
-                vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
+                hook, vendor, device, PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)                   \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,                     \
-                vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
+                hook, vendor, device, PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)                  \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,                    \
-                vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
+                hook, vendor, device, PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook)                  \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,                    \
-                resume##vendor##device##hook, vendor, device,           \
+                resume##hook, vendor, device,           \
                 PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook)            \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,              \
-                resume_early##vendor##device##hook, vendor, device,     \
+                resume_early##hook, vendor, device,     \
                 PCI_ANY_ID, 0, hook)
 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook)                 \
         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,                   \
-                suspend##vendor##device##hook, vendor, device,          \
+                suspend##hook, vendor, device,          \
                 PCI_ANY_ID, 0, hook)
 
 #ifdef CONFIG_PCI_QUIRKS
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 490afc03627e..d0d8fca54065 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -47,6 +47,9 @@ u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
 size_t vmcoreinfo_size;
 size_t vmcoreinfo_max_size = sizeof(vmcoreinfo_data);
 
+/* Flag to indicate we are going to kexec a new kernel */
+bool kexec_in_progress = false;
+
 /* Location of the reserved area for the crash kernel */
 struct resource crashk_res = {
         .name  = "Crash kernel",
@@ -1675,6 +1678,7 @@ int kernel_kexec(void)
         } else
 #endif
         {
+                kexec_in_progress = true;
                 kernel_restart_prepare(NULL);
                 printk(KERN_EMERG "Starting new kernel\n");
                 machine_shutdown();
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index c66912be990f..b010eac595d2 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2851,19 +2851,6 @@ already_gone:
         return false;
 }
 
-static bool __flush_work(struct work_struct *work)
-{
-        struct wq_barrier barr;
-
-        if (start_flush_work(work, &barr)) {
-                wait_for_completion(&barr.done);
-                destroy_work_on_stack(&barr.work);
-                return true;
-        } else {
-                return false;
-        }
-}
-
 /**
  * flush_work - wait for a work to finish executing the last queueing instance
  * @work: the work to flush
@@ -2877,10 +2864,18 @@ static bool __flush_work(struct work_struct *work)
  */
 bool flush_work(struct work_struct *work)
 {
+        struct wq_barrier barr;
+
         lock_map_acquire(&work->lockdep_map);
         lock_map_release(&work->lockdep_map);
 
-        return __flush_work(work);
+        if (start_flush_work(work, &barr)) {
+                wait_for_completion(&barr.done);
+                destroy_work_on_stack(&barr.work);
+                return true;
+        } else {
+                return false;
+        }
 }
 EXPORT_SYMBOL_GPL(flush_work);
 
@@ -4832,14 +4827,7 @@ long work_on_cpu(int cpu, long (*fn)(void *), void *arg)
 
         INIT_WORK_ONSTACK(&wfc.work, work_for_cpu_fn);
         schedule_work_on(cpu, &wfc.work);
-
-        /*
-         * The work item is on-stack and can't lead to deadlock through
-         * flushing.  Use __flush_work() to avoid spurious lockdep warnings
-         * when work_on_cpu()s are nested.
-         */
-        __flush_work(&wfc.work);
-
+        flush_work(&wfc.work);
         return wfc.ret;
 }
 EXPORT_SYMBOL_GPL(work_on_cpu);