6 files changed, 21 insertions, 26 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7de543d1d0b4..24198ad01976 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -19,6 +19,7 @@
 #include <linux/kdev_t.h>
 #include <linux/notifier.h>
 #include <linux/genhd.h>
+#include <linux/kallsyms.h>
 #include <asm/semaphore.h>
 
 #include "base.h"
@@ -68,6 +69,10 @@ static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr,
 
         if (dev_attr->show)
                 ret = dev_attr->show(dev, dev_attr, buf);
+        if (ret >= (ssize_t)PAGE_SIZE) {
+                print_symbol("dev_attr_show: %s returned bad count\n",
+                                (unsigned long)dev_attr->show);
+        }
         return ret;
 }
 
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 977d29b32295..4cb949f0ebd9 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1097,6 +1097,8 @@ static void iommu_free_domain(struct dmar_domain *domain)
 }
 
 static struct iova_domain reserved_iova_list;
+static struct lock_class_key reserved_alloc_key;
+static struct lock_class_key reserved_rbtree_key;
 
 static void dmar_init_reserved_ranges(void)
 {
@@ -1107,6 +1109,11 @@ static void dmar_init_reserved_ranges(void)
 
         init_iova_domain(&reserved_iova_list, DMA_32BIT_PFN);
 
+        lockdep_set_class(&reserved_iova_list.iova_alloc_lock,
+                &reserved_alloc_key);
+        lockdep_set_class(&reserved_iova_list.iova_rbtree_lock,
+                &reserved_rbtree_key);
+
         /* IOAPIC ranges shouldn't be accessed by DMA */
         iova = reserve_iova(&reserved_iova_list, IOVA_PFN(IOAPIC_RANGE_START),
                 IOVA_PFN(IOAPIC_RANGE_END));
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 183fddaa38b7..a4445b7210bf 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -314,24 +314,6 @@ int pci_find_ht_capability(struct pci_dev *dev, int ht_cap)
 }
 EXPORT_SYMBOL_GPL(pci_find_ht_capability);
 
-void pcie_wait_pending_transaction(struct pci_dev *dev)
-{
-        int pos;
-        u16 reg16;
-
-        pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
-        if (!pos)
-                return;
-        while (1) {
-                pci_read_config_word(dev, pos + PCI_EXP_DEVSTA, &reg16);
-                if (!(reg16 & PCI_EXP_DEVSTA_TRPND))
-                        break;
-                cpu_relax();
-        }
-
-}
-EXPORT_SYMBOL_GPL(pcie_wait_pending_transaction);
-
 /**
  * pci_find_parent_resource - return resource region of parent bus of given region
  * @dev: PCI device structure contains resources to be searched
@@ -936,9 +918,6 @@ pci_disable_device(struct pci_dev *dev)
         if (atomic_sub_return(1, &dev->enable_cnt) != 0)
                 return;
 
-        /* Wait for all transactions are finished before disabling the device */
-        pcie_wait_pending_transaction(dev);
-
         pci_read_config_word(dev, PCI_COMMAND, &pci_command);
         if (pci_command & PCI_COMMAND_MASTER) {
                 pci_command &= ~PCI_COMMAND_MASTER;
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index e8a01f264540..11759080ca54 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -470,6 +470,8 @@ static int uio_mmap_physical(struct vm_area_struct *vma)
 
         vma->vm_flags |= VM_IO | VM_RESERVED;
 
+        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
         return remap_pfn_range(vma,
                                vma->vm_start,
                                idev->info->mem[mi].addr >> PAGE_SHIFT,
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index a271c87c4472..baa663e69388 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 #include <linux/kobject.h>
+#include <linux/kallsyms.h>
 #include <linux/namei.h>
 #include <linux/poll.h>
 #include <linux/list.h>
@@ -86,7 +87,12 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
          * The code works fine with PAGE_SIZE return but it's likely to
          * indicate truncated result or overflow in normal use cases.
          */
-        BUG_ON(count >= (ssize_t)PAGE_SIZE);
+        if (count >= (ssize_t)PAGE_SIZE) {
+                print_symbol("fill_read_buffer: %s returned bad count\n",
+                        (unsigned long)ops->show);
+                /* Try to struggle along */
+                count = PAGE_SIZE - 1;
+        }
         if (count >= 0) {
                 buffer->needs_read_fill = 0;
                 buffer->count = count;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b7e4b633c69b..ea760e519c46 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -513,7 +513,6 @@ int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
 int pci_find_ext_capability(struct pci_dev *dev, int cap);
 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
-void pcie_wait_pending_transaction(struct pci_dev *dev);
 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
 
 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
@@ -884,9 +883,6 @@ static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
         return 0;
 }
 
-static inline void pcie_wait_pending_transaction(struct pci_dev *dev)
-{ }
-
 /* Power management related routines */
 static inline int pci_save_state(struct pci_dev *dev)
 {