[PATCH] Char: mxser_new, fix twice resource releasing

Because brd->info is not NULLed, resources are released twice.  NULL it in
pci_remove function.  Also take care of retval and releasing in pci_probe --
mxser_initbrd alreasy releases resource, do not do it again in fail path in
probe function.

Cc: Sergei Organov <osv@javad.com>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 042d1381ff6f3479c1d6b018600bdd63f50bf58a..f078ddf48b791ae6b4152ac0bbb753968558ca7b 100644 (file)
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -2403,9 +2403,8 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
                        brd->info->name, brd->irq);
                /* We hold resources, we need to release them. */
                mxser_release_res(brd, pdev, 0);
-               return retval;
        }
-       return 0;
+       return retval;
 }
 
 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
@@ -2590,8 +2589,9 @@ static int __devinit mxser_probe(struct pci_dev *pdev,
        }
 
        /* mxser_initbrd will hook ISR. */
-       if (mxser_initbrd(brd, pdev) < 0)
-               goto err_relvec;
+       retval = mxser_initbrd(brd, pdev);
+       if (retval)
+               goto err_null;
 
        for (i = 0; i < brd->info->nports; i++)
                tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
@@ -2599,10 +2599,9 @@ static int __devinit mxser_probe(struct pci_dev *pdev,
        pci_set_drvdata(pdev, brd);
 
        return 0;
-err_relvec:
-       pci_release_region(pdev, 3);
 err_relio:
        pci_release_region(pdev, 2);
+err_null:
        brd->info = NULL;
 err:
        return retval;
@@ -2620,6 +2619,7 @@ static void __devexit mxser_remove(struct pci_dev *pdev)
                tty_unregister_device(mxvar_sdriver, brd->idx + i);
 
        mxser_release_res(brd, pdev, 1);
+       brd->info = NULL;
 }
 
 static struct pci_driver mxser_driver = {