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tty: do not check tty_unregister_driver's return value 

These drivers check tty_unregister_driver return value. But they don't
handle a failure correctly (they free the driver in any case). So stop
checking tty_unregister_driver return value and remove also the prints.

In the next patch, tty_unregister_driver's return type will be switched
to void.

Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: linux-xtensa@linux-xtensa.org
Cc: Jiri Kosina <jikos@kernel.org>
Cc: David Sterba <dsterba@suse.com>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210302062214.29627-34-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-03-02 07:22:04 +01:00 committed by Greg Kroah-Hartman
parent ba444ea3bc
commit 6c2e6317c9
6 changed files with 7 additions and 27 deletions
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6
arch/xtensa/platforms/iss/console.c
View File

@ -171,11 +171,7 @@ static int __init rs_init(void)
static __exit void rs_exit(void)
{
int error;
if ((error = tty_unregister_driver(serial_driver)))
pr_err("ISS_SERIAL: failed to unregister serial driver (%d)\n",
error);
tty_unregister_driver(serial_driver);
put_tty_driver(serial_driver);
tty_port_destroy(&serial_port);
}

8
drivers/tty/amiserial.c
View File

@ -1622,21 +1622,17 @@ fail_put_tty_driver:
static int __exit amiga_serial_remove(struct platform_device *pdev)
{
int error;
struct serial_state *state = platform_get_drvdata(pdev);
/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
error = tty_unregister_driver(serial_driver);
if (error)
printk("SERIAL: failed to unregister serial driver (%d)\n",
error);
tty_unregister_driver(serial_driver);
put_tty_driver(serial_driver);
tty_port_destroy(&state->tport);
free_irq(IRQ_AMIGA_TBE, state);
free_irq(IRQ_AMIGA_RBF, state);
return error;
return 0;
}
static struct platform_driver amiga_serial_driver = {

7
drivers/tty/ipwireless/tty.c
View File

@ -596,13 +596,8 @@ int ipwireless_tty_init(void)
void ipwireless_tty_release(void)
{
int ret;
ret = tty_unregister_driver(ipw_tty_driver);
tty_unregister_driver(ipw_tty_driver);
put_tty_driver(ipw_tty_driver);
if (ret != 0)
printk(KERN_ERR IPWIRELESS_PCCARD_NAME
": tty_unregister_driver failed with code %d\n", ret);
}
int ipwireless_tty_is_modem(struct ipw_tty *tty)

4
drivers/tty/moxa.c
View File

@ -1118,9 +1118,7 @@ static void __exit moxa_exit(void)
del_timer_sync(&moxaTimer);
if (tty_unregister_driver(moxaDriver))
printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
"serial driver\n");
tty_unregister_driver(moxaDriver);
put_tty_driver(moxaDriver);
}

4
drivers/tty/serial/kgdb_nmi.c
View File

@ -373,9 +373,7 @@ int kgdb_unregister_nmi_console(void)
if (ret)
return ret;
ret = tty_unregister_driver(kgdb_nmi_tty_driver);
if (ret)
return ret;
tty_unregister_driver(kgdb_nmi_tty_driver);
put_tty_driver(kgdb_nmi_tty_driver);
return 0;

5
drivers/tty/synclink_gt.c
View File

@ -3705,7 +3705,6 @@ static const struct tty_operations ops = {
static void slgt_cleanup(void)
{
int rc;
struct slgt_info *info;
struct slgt_info *tmp;
@ -3714,9 +3713,7 @@ static void slgt_cleanup(void)
if (serial_driver) {
for (info=slgt_device_list ; info != NULL ; info=info->next_device)
tty_unregister_device(serial_driver, info->line);
rc = tty_unregister_driver(serial_driver);
if (rc)
DBGERR(("tty_unregister_driver error=%d\n", rc));
tty_unregister_driver(serial_driver);
put_tty_driver(serial_driver);
}