staging: dgap: unwind on error in dgap_found_board()

Adds a label for "kfree(brd)". And also remove
a state value as BOARD_FAILED in brd when dgap_do_remap() is failed.
Because "brd" will free after failure.

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
index af78f6f057a9f7c9fff564729e2c58a92e68e6f7..5556a6ec8a124e2643dfcdd73c821d886e788d38 100644 (file)
--- a/drivers/staging/dgap/dgap.c
+++ b/drivers/staging/dgap/dgap.c
@@ -673,6 +673,7 @@ static int dgap_found_board(struct pci_dev *pdev, int id)
        struct board_t *brd;
        unsigned int pci_irq;
        int i;
+       int ret;
 
        /* get the board structure and prep it */
        brd = kzalloc(sizeof(struct board_t), GFP_KERNEL);
@@ -728,8 +729,10 @@ static int dgap_found_board(struct pci_dev *pdev, int id)
                brd->membase_end = pci_resource_end(pdev, 0);
        }
 
-       if (!brd->membase)
-               return -ENODEV;
+       if (!brd->membase) {
+               ret = -ENODEV;
+               goto free_brd;
+       }
 
        if (brd->membase & 1)
                brd->membase &= ~3;
@@ -770,14 +773,20 @@ static int dgap_found_board(struct pci_dev *pdev, int id)
        tasklet_init(&brd->helper_tasklet, dgap_poll_tasklet,
                        (unsigned long) brd);
 
-       i = dgap_do_remap(brd);
-       if (i)
-               brd->state = BOARD_FAILED;
+       ret = dgap_do_remap(brd);
+       if (ret)
+               goto free_brd;
 
        pr_info("dgap: board %d: %s (rev %d), irq %ld\n",
                dgap_numboards, brd->name, brd->rev, brd->irq);
 
        return 0;
+
+free_brd:
+       kfree(brd);
+       dgap_board[dgap_numboards] = NULL;
+
+       return ret;
 }