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Date: Wed, 5 May 2021 11:19:11 +0200
From: Jiri Slaby <jslaby@...e.cz>
To: gregkh@...uxfoundation.org
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
Jiri Slaby <jslaby@...e.cz>,
William Hubbs <w.d.hubbs@...il.com>,
Chris Brannon <chris@...-brannons.com>,
Kirk Reiser <kirk@...sers.ca>,
Samuel Thibault <samuel.thibault@...-lyon.org>,
Marcel Holtmann <marcel@...tmann.org>,
Johan Hedberg <johan.hedberg@...il.com>,
Luiz Augusto von Dentz <luiz.dentz@...il.com>,
Arnd Bergmann <arnd@...db.de>,
Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Andreas Koensgen <ajk@...nets.uni-bremen.de>,
Paul Mackerras <paulus@...ba.org>,
Rodolfo Giometti <giometti@...eenne.com>,
Peter Ujfalusi <peter.ujfalusi@...il.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Subject: [PATCH 18/35] tty: no checking of tty_unregister_ldisc
tty_unregister_ldisc now returns 0 = success. No need to check the
return value. In fact, the users only warned if an error occured and
didn't do anything useful anyway -- the ldisc module was unloaded in any
case.
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: William Hubbs <w.d.hubbs@...il.com>
Cc: Chris Brannon <chris@...-brannons.com>
Cc: Kirk Reiser <kirk@...sers.ca>
Cc: Samuel Thibault <samuel.thibault@...-lyon.org>
Cc: Marcel Holtmann <marcel@...tmann.org>
Cc: Johan Hedberg <johan.hedberg@...il.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Wolfgang Grandegger <wg@...ndegger.com>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Andreas Koensgen <ajk@...nets.uni-bremen.de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Rodolfo Giometti <giometti@...eenne.com>
Cc: Peter Ujfalusi <peter.ujfalusi@...il.com>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
---
drivers/accessibility/speakup/spk_ttyio.c | 3 +--
drivers/bluetooth/hci_ldisc.c | 7 +------
drivers/misc/ti-st/st_core.c | 12 +++---------
drivers/net/can/slcan.c | 4 +---
drivers/net/hamradio/6pack.c | 8 +-------
drivers/net/hamradio/mkiss.c | 8 +-------
drivers/net/ppp/ppp_async.c | 3 +--
drivers/net/ppp/ppp_synctty.c | 3 +--
drivers/net/slip/slip.c | 4 +---
drivers/pps/clients/pps-ldisc.c | 8 +-------
drivers/tty/n_gsm.c | 5 +----
drivers/tty/n_hdlc.c | 8 +-------
sound/soc/ti/ams-delta.c | 4 +---
13 files changed, 15 insertions(+), 62 deletions(-)
diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c
index 0b7f1a87eaeb..0d1f397cd896 100644
--- a/drivers/accessibility/speakup/spk_ttyio.c
+++ b/drivers/accessibility/speakup/spk_ttyio.c
@@ -219,8 +219,7 @@ void spk_ttyio_register_ldisc(void)
void spk_ttyio_unregister_ldisc(void)
{
- if (tty_unregister_ldisc(&spk_ttyio_ldisc_ops))
- pr_warn("speakup: Couldn't unregister ldisc\n");
+ tty_unregister_ldisc(&spk_ttyio_ldisc_ops);
}
static int spk_ttyio_out(struct spk_synth *in_synth, const char ch)
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 31e0c804363c..5ed2cfa7da1d 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -883,8 +883,6 @@ static int __init hci_uart_init(void)
static void __exit hci_uart_exit(void)
{
- int err;
-
#ifdef CONFIG_BT_HCIUART_H4
h4_deinit();
#endif
@@ -916,10 +914,7 @@ static void __exit hci_uart_exit(void)
mrvl_deinit();
#endif
- /* Release tty registration of line discipline */
- err = tty_unregister_ldisc(&hci_uart_ldisc);
- if (err)
- BT_ERR("Can't unregister HCI line discipline (%d)", err);
+ tty_unregister_ldisc(&hci_uart_ldisc);
}
module_init(hci_uart_init);
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
index 174ae8e52805..85315e726644 100644
--- a/drivers/misc/ti-st/st_core.c
+++ b/drivers/misc/ti-st/st_core.c
@@ -872,9 +872,7 @@ int st_core_init(struct st_data_s **core_data)
st_gdata = kzalloc(sizeof(struct st_data_s), GFP_KERNEL);
if (!st_gdata) {
pr_err("memory allocation failed");
- err = tty_unregister_ldisc(&st_ldisc_ops);
- if (err)
- pr_err("unable to un-register ldisc %ld", err);
+ tty_unregister_ldisc(&st_ldisc_ops);
err = -ENOMEM;
return err;
}
@@ -892,9 +890,7 @@ int st_core_init(struct st_data_s **core_data)
if (err) {
pr_err("error during st_ll initialization(%ld)", err);
kfree(st_gdata);
- err = tty_unregister_ldisc(&st_ldisc_ops);
- if (err)
- pr_err("unable to un-register ldisc");
+ tty_unregister_ldisc(&st_ldisc_ops);
return err;
}
@@ -919,9 +915,7 @@ void st_core_exit(struct st_data_s *st_gdata)
kfree_skb(st_gdata->rx_skb);
kfree_skb(st_gdata->tx_skb);
/* TTY ldisc cleanup */
- err = tty_unregister_ldisc(&st_ldisc_ops);
- if (err)
- pr_err("unable to un-register ldisc %ld", err);
+ tty_unregister_ldisc(&st_ldisc_ops);
/* free the global data pointer */
kfree(st_gdata);
}
diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index 03a2dbd3c367..d42ec7d1bc14 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -784,9 +784,7 @@ static void __exit slcan_exit(void)
kfree(slcan_devs);
slcan_devs = NULL;
- i = tty_unregister_ldisc(&slc_ldisc);
- if (i)
- printk(KERN_ERR "slcan: can't unregister ldisc (err %d)\n", i);
+ tty_unregister_ldisc(&slc_ldisc);
}
module_init(slcan_init);
diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index aac24f9caceb..686c38c46113 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -774,15 +774,9 @@ static int __init sixpack_init_driver(void)
return status;
}
-static const char msg_unregfail[] = KERN_ERR \
- "6pack: can't unregister line discipline (err = %d)\n";
-
static void __exit sixpack_exit_driver(void)
{
- int ret;
-
- if ((ret = tty_unregister_ldisc(&sp_ldisc)))
- printk(msg_unregfail, ret);
+ tty_unregister_ldisc(&sp_ldisc);
}
/* encode an AX.25 packet into 6pack */
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 750c6afc9302..e3294a0a9800 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -960,15 +960,9 @@ static int __init mkiss_init_driver(void)
return status;
}
-static const char msg_unregfail[] = KERN_ERR \
- "mkiss: can't unregister line discipline (err = %d)\n";
-
static void __exit mkiss_exit_driver(void)
{
- int ret;
-
- if ((ret = tty_unregister_ldisc(&ax_ldisc)))
- printk(msg_unregfail, ret);
+ tty_unregister_ldisc(&ax_ldisc);
}
MODULE_AUTHOR("Ralf Baechle DL5RB <ralf@...ux-mips.org>");
diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index b2d454d01eba..29a93d6bfe37 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -1016,8 +1016,7 @@ static void async_lcp_peek(struct asyncppp *ap, unsigned char *data,
static void __exit ppp_async_cleanup(void)
{
- if (tty_unregister_ldisc(&ppp_ldisc) != 0)
- printk(KERN_ERR "failed to unregister PPP line discipline\n");
+ tty_unregister_ldisc(&ppp_ldisc);
}
module_init(ppp_async_init);
diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index ca403bde56fb..af3e048695b6 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -727,8 +727,7 @@ ppp_sync_input(struct syncppp *ap, const unsigned char *buf,
static void __exit
ppp_sync_cleanup(void)
{
- if (tty_unregister_ldisc(&ppp_sync_ldisc) != 0)
- printk(KERN_ERR "failed to unregister Sync PPP line discipline\n");
+ tty_unregister_ldisc(&ppp_sync_ldisc);
}
module_init(ppp_sync_init);
diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index 867efff40a0e..dc84cb844319 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -1360,9 +1360,7 @@ static void __exit slip_exit(void)
kfree(slip_devs);
slip_devs = NULL;
- i = tty_unregister_ldisc(&sl_ldisc);
- if (i != 0)
- printk(KERN_ERR "SLIP: can't unregister line discipline (err = %d)\n", i);
+ tty_unregister_ldisc(&sl_ldisc);
}
module_init(slip_init);
diff --git a/drivers/pps/clients/pps-ldisc.c b/drivers/pps/clients/pps-ldisc.c
index 91b947f37774..d73c4c2ed4e1 100644
--- a/drivers/pps/clients/pps-ldisc.c
+++ b/drivers/pps/clients/pps-ldisc.c
@@ -129,13 +129,7 @@ static int __init pps_tty_init(void)
static void __exit pps_tty_cleanup(void)
{
- int err;
-
- err = tty_unregister_ldisc(&pps_ldisc_ops);
- if (err)
- pr_err("can't unregister PPS line discipline\n");
- else
- pr_info("PPS line discipline removed\n");
+ tty_unregister_ldisc(&pps_ldisc_ops);
}
module_init(pps_tty_init);
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index db7d4a30af91..157b26ef6259 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3286,10 +3286,7 @@ static int __init gsm_init(void)
static void __exit gsm_exit(void)
{
- int status = tty_unregister_ldisc(&tty_ldisc_packet);
- if (status != 0)
- pr_err("n_gsm: can't unregister line discipline (err = %d)\n",
- status);
+ tty_unregister_ldisc(&tty_ldisc_packet);
tty_unregister_driver(gsm_tty_driver);
put_tty_driver(gsm_tty_driver);
}
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index c2afbfe0a1d5..d899ee4e0116 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -822,13 +822,7 @@ static int __init n_hdlc_init(void)
static void __exit n_hdlc_exit(void)
{
- int status = tty_unregister_ldisc(&n_hdlc_ldisc);
-
- if (status)
- pr_err("N_HDLC: can't unregister line discipline (err = %d)\n",
- status);
- else
- pr_info("N_HDLC: line discipline unregistered\n");
+ tty_unregister_ldisc(&n_hdlc_ldisc);
}
module_init(n_hdlc_init);
diff --git a/sound/soc/ti/ams-delta.c b/sound/soc/ti/ams-delta.c
index e89548e48364..ecd24d412a9b 100644
--- a/sound/soc/ti/ams-delta.c
+++ b/sound/soc/ti/ams-delta.c
@@ -583,9 +583,7 @@ static int ams_delta_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
- if (tty_unregister_ldisc(&cx81801_ops) != 0)
- dev_warn(&pdev->dev,
- "failed to unregister V253 line discipline\n");
+ tty_unregister_ldisc(&cx81801_ops);
snd_soc_unregister_card(card);
card->dev = NULL;
--
2.31.1
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