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Date: Mon, 24 Feb 2014 00:21:51 +0400
From: Alexey Khoroshilov <khoroshilov@...ras.ru>
To: Todza Louina <lidza.louina@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alexey Khoroshilov <khoroshilov@...ras.ru>,
driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH 1/3] staging: dgap: remove unneeded status variables
dgap_driver_start and dgap_Major_Control_Registered are used
to keep status of initialization of the driver as a whole and its "Major Control".
But the code that checks them is executed once on module init/unload.
That makes no sense in these variables as far as their values are predictable
at any time.
Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
drivers/staging/dgap/dgap_driver.c | 105 ++++++++++++++++---------------------
1 file changed, 46 insertions(+), 59 deletions(-)
diff --git a/drivers/staging/dgap/dgap_driver.c b/drivers/staging/dgap/dgap_driver.c
index 089d017fc291..d7f1e999aaa4 100644
--- a/drivers/staging/dgap/dgap_driver.c
+++ b/drivers/staging/dgap/dgap_driver.c
@@ -117,9 +117,6 @@ int dgap_poll_tick = 20; /* Poll interval - 20 ms */
/*
* Static vars.
*/
-static int dgap_Major_Control_Registered = FALSE;
-static uint dgap_driver_start = FALSE;
-
static struct class * dgap_class;
/*
@@ -283,65 +280,57 @@ static int dgap_start(void)
int rc = 0;
unsigned long flags;
- if (dgap_driver_start == FALSE) {
-
- dgap_driver_start = TRUE;
+ /* make sure that the globals are init'd before we do anything else */
+ dgap_init_globals();
- /* make sure that the globals are init'd before we do anything else */
- dgap_init_globals();
+ dgap_NumBoards = 0;
- dgap_NumBoards = 0;
+ APR(("For the tools package or updated drivers please visit http://www.digi.com\n"));
- APR(("For the tools package or updated drivers please visit http://www.digi.com\n"));
-
- /*
- * Register our base character device into the kernel.
- * This allows the download daemon to connect to the downld device
- * before any of the boards are init'ed.
- */
- if (!dgap_Major_Control_Registered) {
- /*
- * Register management/dpa devices
- */
- rc = register_chrdev(DIGI_DGAP_MAJOR, "dgap", &DgapBoardFops);
- if (rc < 0) {
- APR(("Can't register dgap driver device (%d)\n", rc));
- return (rc);
- }
+ /*
+ * Register our base character device into the kernel.
+ * This allows the download daemon to connect to the downld device
+ * before any of the boards are init'ed.
+ */
- dgap_class = class_create(THIS_MODULE, "dgap_mgmt");
- device_create(dgap_class, NULL,
- MKDEV(DIGI_DGAP_MAJOR, 0),
- NULL, "dgap_mgmt");
- device_create(dgap_class, NULL,
- MKDEV(DIGI_DGAP_MAJOR, 1),
- NULL, "dgap_downld");
- dgap_Major_Control_Registered = TRUE;
- }
+ /*
+ * Register management/dpa devices
+ */
+ rc = register_chrdev(DIGI_DGAP_MAJOR, "dgap", &DgapBoardFops);
+ if (rc < 0) {
+ APR(("Can't register dgap driver device (%d)\n", rc));
+ return (rc);
+ }
- /*
- * Init any global tty stuff.
- */
- rc = dgap_tty_preinit();
+ dgap_class = class_create(THIS_MODULE, "dgap_mgmt");
+ device_create(dgap_class, NULL,
+ MKDEV(DIGI_DGAP_MAJOR, 0),
+ NULL, "dgap_mgmt");
+ device_create(dgap_class, NULL,
+ MKDEV(DIGI_DGAP_MAJOR, 1),
+ NULL, "dgap_downld");
- if (rc < 0) {
- APR(("tty preinit - not enough memory (%d)\n", rc));
- return(rc);
- }
+ /*
+ * Init any global tty stuff.
+ */
+ rc = dgap_tty_preinit();
+ if (rc < 0) {
+ APR(("tty preinit - not enough memory (%d)\n", rc));
+ return(rc);
+ }
- /* Start the poller */
- DGAP_LOCK(dgap_poll_lock, flags);
- init_timer(&dgap_poll_timer);
- dgap_poll_timer.function = dgap_poll_handler;
- dgap_poll_timer.data = 0;
- dgap_poll_time = jiffies + dgap_jiffies_from_ms(dgap_poll_tick);
- dgap_poll_timer.expires = dgap_poll_time;
- DGAP_UNLOCK(dgap_poll_lock, flags);
+ /* Start the poller */
+ DGAP_LOCK(dgap_poll_lock, flags);
+ init_timer(&dgap_poll_timer);
+ dgap_poll_timer.function = dgap_poll_handler;
+ dgap_poll_timer.data = 0;
+ dgap_poll_time = jiffies + dgap_jiffies_from_ms(dgap_poll_tick);
+ dgap_poll_timer.expires = dgap_poll_time;
+ DGAP_UNLOCK(dgap_poll_lock, flags);
- add_timer(&dgap_poll_timer);
+ add_timer(&dgap_poll_timer);
- dgap_driver_state = DRIVER_NEED_CONFIG_LOAD;
- }
+ dgap_driver_state = DRIVER_NEED_CONFIG_LOAD;
return (rc);
}
@@ -409,12 +398,10 @@ void dgap_cleanup_module(void)
dgap_remove_driver_sysfiles(&dgap_driver);
- if (dgap_Major_Control_Registered) {
- device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 0));
- device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 1));
- class_destroy(dgap_class);
- unregister_chrdev(DIGI_DGAP_MAJOR, "dgap");
- }
+ device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 0));
+ device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 1));
+ class_destroy(dgap_class);
+ unregister_chrdev(DIGI_DGAP_MAJOR, "dgap");
kfree(dgap_config_buf);
--
1.8.3.2
--
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