staging/comedi: Add macro for registering a comedi PCMCIA driver

This patch introduces a new macro 'module_comedi_pcmcia_driver'
for comedi PCMCIA drivers which do not do anything special in module
init/exit. This eliminates a lot of boilerplate.

Adapted from 'module_comedi_pci_driver'

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 85b84b0..6211d44 100644 (file)
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -316,6 +316,27 @@ void comedi_pci_driver_unregister(struct comedi_driver *, struct pci_driver *);
        module_driver(__comedi_driver, comedi_pci_driver_register, \
                        comedi_pci_driver_unregister, &(__pci_driver))
 
+struct pcmcia_driver;
+
+int comedi_pcmcia_driver_register(struct comedi_driver *,
+                                       struct pcmcia_driver *);
+void comedi_pcmcia_driver_unregister(struct comedi_driver *,
+                                       struct pcmcia_driver *);
+
+/**
+ * module_comedi_pcmcia_driver() - Helper macro for registering a comedi PCMCIA driver
+ * @__comedi_driver: comedi_driver struct
+ * @__pcmcia_driver: pcmcia_driver struct
+ *
+ * Helper macro for comedi PCMCIA drivers which do not do anything special
+ * in module init/exit. This eliminates a lot of boilerplate. Each
+ * module may only use this macro once, and calling it replaces
+ * module_init() and module_exit()
+ */
+#define module_comedi_pcmcia_driver(__comedi_driver, __pcmcia_driver) \
+       module_driver(__comedi_driver, comedi_pcmcia_driver_register, \
+                       comedi_pcmcia_driver_unregister, &(__pcmcia_driver))
+
 struct usb_driver;
 
 int comedi_usb_driver_register(struct comedi_driver *, struct usb_driver *);

diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index dca26f5..8b681ac 100644 (file)
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -24,6 +24,8 @@
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
 #include <linux/usb.h>
 #include <linux/errno.h>
 #include <linux/kconfig.h>
@@ -556,6 +558,36 @@ void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
 }
 EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
 
+#if IS_ENABLED(CONFIG_PCMCIA)
+int comedi_pcmcia_driver_register(struct comedi_driver *comedi_driver,
+               struct pcmcia_driver *pcmcia_driver)
+{
+       int ret;
+
+       ret = comedi_driver_register(comedi_driver);
+       if (ret < 0)
+               return ret;
+
+       ret = pcmcia_register_driver(pcmcia_driver);
+       if (ret < 0) {
+               comedi_driver_unregister(comedi_driver);
+               return ret;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_register);
+
+void comedi_pcmcia_driver_unregister(struct comedi_driver *comedi_driver,
+               struct pcmcia_driver *pcmcia_driver)
+{
+       pcmcia_unregister_driver(pcmcia_driver);
+       comedi_driver_unregister(comedi_driver);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_unregister);
+
+#endif
+
 #if IS_ENABLED(CONFIG_USB)
 
 int comedi_usb_driver_register(struct comedi_driver *comedi_driver,