1 files changed, 15 insertions, 20 deletions

diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index aec214ac0a14..8f06e1ed028c 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -21,8 +21,6 @@
 #include "conf_space.h"
 #include "conf_space_quirks.h"
 
-#define DRV_NAME        "xen-pciback"
-
 static char *pci_devs_to_hide;
 wait_queue_head_t xen_pcibk_aer_wait_queue;
 /*Add sem for sync AER handling and xen_pcibk remove/reconfigue ops,
@@ -222,6 +220,8 @@ void pcistub_put_pci_dev(struct pci_dev *dev)
         }
 
         spin_unlock_irqrestore(&pcistub_devices_lock, flags);
+        if (WARN_ON(!found_psdev))
+                return;
 
         /*hold this lock for avoiding breaking link between
         * pcistub and xen_pcibk when AER is in processing
@@ -514,12 +514,9 @@ static void kill_domain_by_device(struct pcistub_device *psdev)
         int err;
         char nodename[PCI_NODENAME_MAX];
 
-        if (!psdev)
-                dev_err(&psdev->dev->dev,
-                        "device is NULL when do AER recovery/kill_domain\n");
+        BUG_ON(!psdev);
         snprintf(nodename, PCI_NODENAME_MAX, "/local/domain/0/backend/pci/%d/0",
                 psdev->pdev->xdev->otherend_id);
-        nodename[strlen(nodename)] = '\0';
 
 again:
         err = xenbus_transaction_start(&xbt);
@@ -605,7 +602,7 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
         if (test_bit(_XEN_PCIF_active,
                 (unsigned long *)&psdev->pdev->sh_info->flags)) {
                 dev_dbg(&psdev->dev->dev,
-                        "schedule pci_conf service in xen_pcibk\n");
+                        "schedule pci_conf service in " DRV_NAME "\n");
                 xen_pcibk_test_and_schedule_op(psdev->pdev);
         }
 
@@ -995,8 +992,7 @@ out:
                 err = count;
         return err;
 }
-
-DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
+static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
 
 static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
                                    size_t count)
@@ -1015,8 +1011,7 @@ out:
                 err = count;
         return err;
 }
-
-DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
+static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
 
 static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
 {
@@ -1039,8 +1034,7 @@ static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
 
         return count;
 }
-
-DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
+static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
 
 static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
 {
@@ -1069,8 +1063,7 @@ static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
         spin_unlock_irqrestore(&pcistub_devices_lock, flags);
         return count;
 }
-
-DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
+static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
 
 static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
                                           const char *buf,
@@ -1106,7 +1099,8 @@ out:
                 err = count;
         return err;
 }
-DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL, pcistub_irq_handler_switch);
+static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL,
+                   pcistub_irq_handler_switch);
 
 static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
                                  size_t count)
@@ -1170,8 +1164,8 @@ out:
 
         return count;
 }
-
-DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show, pcistub_quirk_add);
+static DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show,
+                   pcistub_quirk_add);
 
 static ssize_t permissive_add(struct device_driver *drv, const char *buf,
                               size_t count)
@@ -1236,8 +1230,8 @@ static ssize_t permissive_show(struct device_driver *drv, char *buf)
         spin_unlock_irqrestore(&pcistub_devices_lock, flags);
         return count;
 }
-
-DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show, permissive_add);
+static DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show,
+                   permissive_add);
 
 static void pcistub_exit(void)
 {
@@ -1374,3 +1368,4 @@ module_init(xen_pcibk_init);
 module_exit(xen_pcibk_cleanup);
 
 MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("xen-backend:pci");