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can: peak_usb: fix cleanup sequence order in case of error during init 

This patch sets the correct reverse sequence order to the instructions
set to run, when any failure occurs during the initialization steps.
It also adds the missing unregistration call of the can device if the
failure appears after having been registered.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2014-11-28 13:49:10 +01:00 committed by Marc Kleine-Budde
parent dc50ddcd4c
commit af35d0f1cc
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/can/usb/peak_usb/pcan_usb_core.c
View File

@ -735,7 +735,7 @@ static int peak_usb_create_dev(struct peak_usb_adapter *peak_usb_adapter,
dev->cmd_buf = kmalloc(PCAN_USB_MAX_CMD_LEN, GFP_KERNEL);
if (!dev->cmd_buf) {
err = -ENOMEM;
goto lbl_set_intf_data;
goto lbl_free_candev;
}
dev->udev = usb_dev;
@ -775,7 +775,7 @@ static int peak_usb_create_dev(struct peak_usb_adapter *peak_usb_adapter,
err = register_candev(netdev);
if (err) {
dev_err(&intf->dev, "couldn't register CAN device: %d\n", err);
goto lbl_free_cmd_buf;
goto lbl_restore_intf_data;
}
if (dev->prev_siblings)
@ -788,14 +788,14 @@ static int peak_usb_create_dev(struct peak_usb_adapter *peak_usb_adapter,
if (dev->adapter->dev_init) {
err = dev->adapter->dev_init(dev);
if (err)
goto lbl_free_cmd_buf;
goto lbl_unregister_candev;
}
/* set bus off */
if (dev->adapter->dev_set_bus) {
err = dev->adapter->dev_set_bus(dev, 0);
if (err)
goto lbl_free_cmd_buf;
goto lbl_unregister_candev;
}
/* get device number early */
@ -807,11 +807,14 @@ static int peak_usb_create_dev(struct peak_usb_adapter *peak_usb_adapter,
return 0;
lbl_free_cmd_buf:
lbl_unregister_candev:
unregister_candev(netdev);
lbl_restore_intf_data:
usb_set_intfdata(intf, dev->prev_siblings);
kfree(dev->cmd_buf);
lbl_set_intf_data:
usb_set_intfdata(intf, dev->prev_siblings);
lbl_free_candev:
free_candev(netdev);
return err;