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commit 822b7683fff11f152e74c404b3d915f6e5b13698
parent 50a5528a4b19b7324f0796ea2fedf32530a11ff8
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun,  9 Dec 2018 10:24:29 -0800

Merge tag 'tty-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty driver fixes from Greg KH:
 "Here are three small tty driver fixes for 4.20-rc6

  Nothing major, just some bug fixes for reported issues. Full details
  are in the shortlog.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  kgdboc: fix KASAN global-out-of-bounds bug in param_set_kgdboc_var()
  tty: serial: 8250_mtk: always resume the device in probe.
  tty: do not set TTY_IO_ERROR flag if console port

Diffstat:
Mdrivers/tty/serial/8250/8250_mtk.c | 16+++++++---------
Mdrivers/tty/serial/kgdboc.c | 4++--
Mdrivers/tty/tty_port.c | 3++-
3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c @@ -213,17 +213,17 @@ static int mtk8250_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); - pm_runtime_enable(&pdev->dev); - if (!pm_runtime_enabled(&pdev->dev)) { - err = mtk8250_runtime_resume(&pdev->dev); - if (err) - return err; - } + err = mtk8250_runtime_resume(&pdev->dev); + if (err) + return err; data->line = serial8250_register_8250_port(&uart); if (data->line < 0) return data->line; + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + return 0; } @@ -234,13 +234,11 @@ static int mtk8250_remove(struct platform_device *pdev) pm_runtime_get_sync(&pdev->dev); serial8250_unregister_port(data->line); + mtk8250_runtime_suspend(&pdev->dev); pm_runtime_disable(&pdev->dev); pm_runtime_put_noidle(&pdev->dev); - if (!pm_runtime_status_suspended(&pdev->dev)) - mtk8250_runtime_suspend(&pdev->dev); - return 0; } diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c @@ -233,7 +233,7 @@ static void kgdboc_put_char(u8 chr) static int param_set_kgdboc_var(const char *kmessage, const struct kernel_param *kp) { - int len = strlen(kmessage); + size_t len = strlen(kmessage); if (len >= MAX_CONFIG_LEN) { pr_err("config string too long\n"); @@ -254,7 +254,7 @@ static int param_set_kgdboc_var(const char *kmessage, strcpy(config, kmessage); /* Chop out \n char as a result of echo */ - if (config[len - 1] == '\n') + if (len && config[len - 1] == '\n') config[len - 1] = '\0'; if (configured == 1) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c @@ -633,7 +633,8 @@ void tty_port_close(struct tty_port *port, struct tty_struct *tty, if (tty_port_close_start(port, tty, filp) == 0) return; tty_port_shutdown(port, tty); - set_bit(TTY_IO_ERROR, &tty->flags); + if (!port->console) + set_bit(TTY_IO_ERROR, &tty->flags); tty_port_close_end(port, tty); tty_port_tty_set(port, NULL); }