The dgap_init_module() need to unwind for cleanup variables properly.
Because dgap_init_module() calls dgap_cleanup_module() for freeing
variables but this function is possible to free variables
which are not allocated.
Signed-off-by: Daeseok Youn <daeseok.youn@xxxxxxxxx>
---
V2: change ulong which is non-standard to "unsigned long".
drivers/staging/dgap/dgap.c | 27 ++++++++++++++++++++++-----
1 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
index 7c79fe6..290ca3b 100644
--- a/drivers/staging/dgap/dgap.c
+++ b/drivers/staging/dgap/dgap.c
@@ -71,6 +71,7 @@ MODULE_DESCRIPTION("Driver for the Digi International EPCA PCI based product lin
MODULE_SUPPORTED_DEVICE("dgap");
static int dgap_start(void);
+static void dgap_stop(void);
static void dgap_init_globals(void);
static struct board_t *dgap_found_board(struct pci_dev *pdev, int id,
int boardnum);
@@ -479,19 +480,20 @@ static int dgap_init_module(void)
rc = pci_register_driver(&dgap_driver);
if (rc)
- goto err_cleanup;
+ goto err_stop;
rc = dgap_create_driver_sysfiles(&dgap_driver);
if (rc)
- goto err_cleanup;
+ goto err_unregister;
dgap_driver_state = DRIVER_READY;
return 0;
-err_cleanup:
-
- dgap_cleanup_module();
+err_unregister:
+ pci_unregister_driver(&dgap_driver);
+err_stop:
+ dgap_stop();
return rc;
}
@@ -561,6 +563,21 @@ failed_class:
return rc;
}
+static void dgap_stop(void)
+{
+ unsigned long lock_flags;
+
+ spin_lock_irqsave(&dgap_poll_lock, lock_flags);
+ dgap_poll_stop = 1;
+ spin_unlock_irqrestore(&dgap_poll_lock, lock_flags);
+
+ del_timer_sync(&dgap_poll_timer);
+
+ device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 0));
+ class_destroy(dgap_class);
+ unregister_chrdev(DIGI_DGAP_MAJOR, "dgap");
+}
+
static int dgap_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int rc;
--
1.7.1
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