[media] cx88: convert struct cx88_core.refcount from atomic_t to refcount_t

refcount_t is better suitable for counting references than atomic_t.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/pci/cx88/cx88-cards.c b/drivers/media/pci/cx88/cx88-cards.c
index 61e1803..73cc7a6 100644 (file)
--- a/drivers/media/pci/cx88/cx88-cards.c
+++ b/drivers/media/pci/cx88/cx88-cards.c
@@ -3670,7 +3670,7 @@ struct cx88_core *cx88_core_create(struct pci_dev *pci, int nr)
        if (!core)
                return NULL;
 
-       atomic_inc(&core->refcount);
+       refcount_set(&core->refcount, 1);
        core->pci_bus  = pci->bus->number;
        core->pci_slot = PCI_SLOT(pci->devfn);
        core->pci_irqmask = PCI_INT_RISC_RD_BERRINT | PCI_INT_RISC_WR_BERRINT |

diff --git a/drivers/media/pci/cx88/cx88-core.c b/drivers/media/pci/cx88/cx88-core.c
index 973a9cd..8bfa5b7 100644 (file)
--- a/drivers/media/pci/cx88/cx88-core.c
+++ b/drivers/media/pci/cx88/cx88-core.c
@@ -1052,7 +1052,7 @@ struct cx88_core *cx88_core_get(struct pci_dev *pci)
                        mutex_unlock(&devlist);
                        return NULL;
                }
-               atomic_inc(&core->refcount);
+               refcount_inc(&core->refcount);
                mutex_unlock(&devlist);
                return core;
        }
@@ -1073,7 +1073,7 @@ void cx88_core_put(struct cx88_core *core, struct pci_dev *pci)
        release_mem_region(pci_resource_start(pci, 0),
                           pci_resource_len(pci, 0));
 
-       if (!atomic_dec_and_test(&core->refcount))
+       if (!refcount_dec_and_test(&core->refcount))
                return;
 
        mutex_lock(&devlist);

diff --git a/drivers/media/pci/cx88/cx88.h b/drivers/media/pci/cx88/cx88.h
index 115414c..6777926 100644 (file)
--- a/drivers/media/pci/cx88/cx88.h
+++ b/drivers/media/pci/cx88/cx88.h
@@ -24,6 +24,7 @@
 #include <linux/i2c-algo-bit.h>
 #include <linux/videodev2.h>
 #include <linux/kdev_t.h>
+#include <linux/refcount.h>
 
 #include <media/v4l2-device.h>
 #include <media/v4l2-fh.h>
@@ -339,7 +340,7 @@ struct cx8802_dev;
 
 struct cx88_core {
        struct list_head           devlist;
-       atomic_t                   refcount;
+       refcount_t                 refcount;
 
        /* board name */
        int                        nr;