Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:
 "The bulk of the s390 updates for v3.14.

  New features are the perf support for the CPU-Measurement Sample
  Facility and the EP11 support for the crypto cards.  And the normal
  cleanups and bug-fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (44 commits)
  s390/cpum_sf: fix printk format warnings
  s390: Fix misspellings using 'codespell' tool
  s390/qdio: bridgeport support - CHSC part
  s390: delete new instances of __cpuinit usage
  s390/compat: fix PSW32_USER_BITS definition
  s390/zcrypt: add support for EP11 coprocessor cards
  s390/mm: optimize randomize_et_dyn for !PF_RANDOMIZE
  s390: use IS_ENABLED to check if a CONFIG is set to y or m
  s390/cio: use device_lock to synchronize calls to the ccwgroup driver
  s390/cio: use device_lock to synchronize calls to the ccw driver
  s390/cio: fix unlocked access of online member
  s390/cpum_sf: Add flag to process full SDBs only
  s390/cpum_sf: Add raw data sampling to support the diagnostic-sampling function
  s390/cpum_sf: Filter perf events based event->attr.exclude_* settings
  s390/cpum_sf: Detect KVM guest samples
  s390/cpum_sf: Add helper to read TOD from trailer entries
  s390/cpum_sf: Atomically reset trailer entry fields of sample-data-blocks
  s390/cpum_sf: Dynamically extend the sampling buffer if overflows occur
  s390/pci: reenable per default
  s390/pci/dma: fix accounting of allocated_pages
  ...

3 files changed, 41 insertions, 14 deletions

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index bf7c73d71eef..0820362c7b0f 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -919,17 +919,23 @@ static void zpci_mem_exit(void)
         kmem_cache_destroy(zdev_fmb_cache);
 }
 
-static unsigned int s390_pci_probe;
+static unsigned int s390_pci_probe = 1;
+static unsigned int s390_pci_initialized;
 
 char * __init pcibios_setup(char *str)
 {
-        if (!strcmp(str, "on")) {
-                s390_pci_probe = 1;
+        if (!strcmp(str, "off")) {
+                s390_pci_probe = 0;
                 return NULL;
         }
         return str;
 }
 
+bool zpci_is_enabled(void)
+{
+        return s390_pci_initialized;
+}
+
 static int __init pci_base_init(void)
 {
         int rc;
@@ -961,6 +967,7 @@ static int __init pci_base_init(void)
         if (rc)
                 goto out_find;
 
+        s390_pci_initialized = 1;
         return 0;
 
 out_find:
@@ -978,5 +985,6 @@ subsys_initcall_sync(pci_base_init);
 
 void zpci_rescan(void)
 {
-        clp_rescan_pci_devices_simple();
+        if (zpci_is_enabled())
+                clp_rescan_pci_devices_simple();
 }
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index 9b83d080902d..60c11a629d96 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -285,7 +285,7 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page,
                 flags |= ZPCI_TABLE_PROTECTED;
 
         if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) {
-                atomic64_add(nr_pages, (atomic64_t *) &zdev->fmb->mapped_pages);
+                atomic64_add(nr_pages, &zdev->fmb->mapped_pages);
                 return dma_addr + (offset & ~PAGE_MASK);
         }
 
@@ -313,7 +313,7 @@ static void s390_dma_unmap_pages(struct device *dev, dma_addr_t dma_addr,
                 zpci_err_hex(&dma_addr, sizeof(dma_addr));
         }
 
-        atomic64_add(npages, (atomic64_t *) &zdev->fmb->unmapped_pages);
+        atomic64_add(npages, &zdev->fmb->unmapped_pages);
         iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
         dma_free_iommu(zdev, iommu_page_index, npages);
 }
@@ -332,7 +332,6 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
         if (!page)
                 return NULL;
 
-        atomic64_add(size / PAGE_SIZE, (atomic64_t *) &zdev->fmb->allocated_pages);
         pa = page_to_phys(page);
         memset((void *) pa, 0, size);
 
@@ -343,6 +342,7 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
                 return NULL;
         }
 
+        atomic64_add(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
         if (dma_handle)
                 *dma_handle = map;
         return (void *) pa;
@@ -352,8 +352,11 @@ static void s390_dma_free(struct device *dev, size_t size,
                           void *pa, dma_addr_t dma_handle,
                           struct dma_attrs *attrs)
 {
-        s390_dma_unmap_pages(dev, dma_handle, PAGE_ALIGN(size),
-                             DMA_BIDIRECTIONAL, NULL);
+        struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
+
+        size = PAGE_ALIGN(size);
+        atomic64_sub(size / PAGE_SIZE, &zdev->fmb->allocated_pages);
+        s390_dma_unmap_pages(dev, dma_handle, size, DMA_BIDIRECTIONAL, NULL);
         free_pages((unsigned long) pa, get_order(size));
 }
 
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 069607209a30..01e251b1da0c 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -43,9 +43,8 @@ struct zpci_ccdf_avail {
         u16 pec;                        /* PCI event code */
 } __packed;
 
-void zpci_event_error(void *data)
+static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
 {
-        struct zpci_ccdf_err *ccdf = data;
         struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
 
         zpci_err("error CCDF:\n");
@@ -58,9 +57,14 @@ void zpci_event_error(void *data)
                pci_name(zdev->pdev), ccdf->pec, ccdf->fid);
 }
 
-void zpci_event_availability(void *data)
+void zpci_event_error(void *data)
+{
+        if (zpci_is_enabled())
+                __zpci_event_error(data);
+}
+
+static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 {
-        struct zpci_ccdf_avail *ccdf = data;
         struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
         struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
         int ret;
@@ -99,8 +103,12 @@ void zpci_event_availability(void *data)
 
                 break;
         case 0x0304: /* Configured -> Standby */
-                if (pdev)
+                if (pdev) {
+                        /* Give the driver a hint that the function is
+                         * already unusable. */
+                        pdev->error_state = pci_channel_io_perm_failure;
                         pci_stop_and_remove_bus_device(pdev);
+                }
 
                 zdev->fh = ccdf->fh;
                 zpci_disable_device(zdev);
@@ -110,6 +118,8 @@ void zpci_event_availability(void *data)
                 clp_rescan_pci_devices();
                 break;
         case 0x0308: /* Standby -> Reserved */
+                if (!zdev)
+                        break;
                 pci_stop_root_bus(zdev->bus);
                 pci_remove_root_bus(zdev->bus);
                 break;
@@ -117,3 +127,9 @@ void zpci_event_availability(void *data)
                 break;
         }
 }
+
+void zpci_event_availability(void *data)
+{
+        if (zpci_is_enabled())
+                __zpci_event_availability(data);
+}