staging: dgnc: introduce the dgnc_free_irq()

The dgnc_free_irq() will free the requested IRQ from
the dgnc_request_irq().

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c
index 70e68b5..81ce5c4 100644 (file)
--- a/drivers/staging/dgnc/dgnc_driver.c
+++ b/drivers/staging/dgnc/dgnc_driver.c
@@ -38,6 +38,7 @@ MODULE_SUPPORTED_DEVICE("dgnc");
  */
 static int             dgnc_start(void);
 static int dgnc_request_irq(struct dgnc_board *brd);
+static void dgnc_free_irq(struct dgnc_board *brd);
 static struct dgnc_board *dgnc_found_board(struct pci_dev *pdev, int id);
 static void            dgnc_cleanup_board(struct dgnc_board *brd);
 static void            dgnc_poll_handler(ulong dummy);
@@ -305,7 +306,7 @@ static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
        rc = dgnc_tty_init(brd);
        if (rc < 0) {
                pr_err(DRVSTR ": Can't init tty devices (%d)\n", rc);
-               goto unregister_tty;
+               goto free_irq;
        }
 
        brd->state = BOARD_READY;
@@ -317,6 +318,8 @@ static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
        return 0;
 
+free_irq:
+       dgnc_free_irq(brd);
 unregister_tty:
        dgnc_tty_unregister(brd);
 
@@ -577,6 +580,12 @@ static int dgnc_request_irq(struct dgnc_board *brd)
        return rc;
 }
 
+static void dgnc_free_irq(struct dgnc_board *brd)
+{
+       if (brd->irq)
+               free_irq(brd->irq, brd);
+}
+
 /*
  * Remap PCI memory.
  */