diff options
author | Jiri Slaby <jslaby@suse.cz> | 2012-08-07 21:47:34 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-10 13:27:51 -0700 |
commit | fbf1c247dac8574ef3973adce4b20d40ff22214e (patch) | |
tree | 0b7e03cc3a89eaa237e5ab4aeb2f48034bbd85fa /drivers/misc | |
parent | 3140bae26c9105b4ec8ff4935631f2f09882553d (diff) | |
download | linux-stable-fbf1c247dac8574ef3973adce4b20d40ff22214e.tar.gz linux-stable-fbf1c247dac8574ef3973adce4b20d40ff22214e.tar.bz2 linux-stable-fbf1c247dac8574ef3973adce4b20d40ff22214e.zip |
misc: pti, fix fail paths
Fail paths in ->probe and pti_init are incomplete. Fix that by adding
proper clean-up paths.
Note that we used to leak tty_driver on module unload. This is fixed
here too.
tty_unregister_driver needs not retval checking, so remove that.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/pti.c | 53 |
1 files changed, 25 insertions, 28 deletions
diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index be6e6795d79d..90de855abb90 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -811,7 +811,7 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, __func__, __LINE__); pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - return retval; + goto err; } retval = pci_enable_device(pdev); @@ -819,17 +819,16 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "%s: pci_enable_device() returned error %d\n", __func__, retval); - return retval; + goto err_unreg_misc; } drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL); - if (drv_data == NULL) { retval = -ENOMEM; dev_err(&pdev->dev, "%s(%d): kmalloc() returned NULL memory.\n", __func__, __LINE__); - return retval; + goto err_disable_pci; } drv_data->pti_addr = pci_resource_start(pdev, pci_bar); @@ -838,18 +837,15 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "%s(%d): pci_request_region() returned error %d\n", __func__, __LINE__, retval); - kfree(drv_data); - return retval; + goto err_free_dd; } drv_data->aperture_base = drv_data->pti_addr+APERTURE_14; drv_data->pti_ioaddr = ioremap_nocache((u32)drv_data->aperture_base, APERTURE_LEN); if (!drv_data->pti_ioaddr) { - pci_release_region(pdev, pci_bar); retval = -ENOMEM; - kfree(drv_data); - return retval; + goto err_rel_reg; } pci_set_drvdata(pdev, drv_data); @@ -862,6 +858,16 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, register_console(&pti_console); + return 0; +err_rel_reg: + pci_release_region(pdev, pci_bar); +err_free_dd: + kfree(drv_data); +err_disable_pci: + pci_disable_device(pdev); +err_unreg_misc: + misc_deregister(&pti_char_driver); +err: return retval; } @@ -937,25 +943,24 @@ static int __init pti_init(void) pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - pti_tty_driver = NULL; - return retval; + goto put_tty; } retval = pci_register_driver(&pti_pci_driver); - if (retval) { pr_err("%s(%d): PCI registration failed of pti driver\n", __func__, __LINE__); pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - - tty_unregister_driver(pti_tty_driver); - pr_err("%s(%d): Unregistering TTY part of pti driver\n", - __func__, __LINE__); - pti_tty_driver = NULL; - return retval; + goto unreg_tty; } + return 0; +unreg_tty: + tty_unregister_driver(pti_tty_driver); +put_tty: + put_tty_driver(pti_tty_driver); + pti_tty_driver = NULL; return retval; } @@ -964,17 +969,9 @@ static int __init pti_init(void) */ static void __exit pti_exit(void) { - int retval; - - retval = tty_unregister_driver(pti_tty_driver); - if (retval) { - pr_err("%s(%d): TTY unregistration failed of pti driver\n", - __func__, __LINE__); - pr_err("%s(%d): Error value returned: %d\n", - __func__, __LINE__, retval); - } - + tty_unregister_driver(pti_tty_driver); pci_unregister_driver(&pti_pci_driver); + put_tty_driver(pti_tty_driver); } module_init(pti_init); |