staging: comedi: drivers: (!foo) preferred over (foo == NULL)

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index e87c68cf11d4751fb65cc43c940f700eb3d52f76..57dcffe00204580129478a202527b56362078726 100644 (file)
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -46,7 +46,7 @@ int comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev)
 {
        if (hw_dev == dev->hw_dev)
                return 0;
-       if (dev->hw_dev != NULL)
+       if (dev->hw_dev)
                return -EEXIST;
        dev->hw_dev = get_device(hw_dev);
        return 0;
@@ -802,7 +802,7 @@ int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                }
                module_put(driv->module);
        }
-       if (driv == NULL) {
+       if (!driv) {
                /*  recognize has failed if we get here */
                /*  report valid board names before returning error */
                for (driv = comedi_drivers; driv; driv = driv->next) {
@@ -814,7 +814,7 @@ int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                ret = -EIO;
                goto out;
        }
-       if (driv->attach == NULL) {
+       if (!driv->attach) {
                /* driver does not support manual configuration */
                dev_warn(dev->class_dev,
                         "driver '%s' does not support attach using comedi_config\n",
@@ -898,7 +898,7 @@ EXPORT_SYMBOL_GPL(comedi_auto_config);
 
 void comedi_auto_unconfig(struct device *hardware_device)
 {
-       if (hardware_device == NULL)
+       if (!hardware_device)
                return;
        comedi_release_hardware_device(hardware_device);
 }