Messages in this thread Patch in this message | | | From | Peter Hurley <> | Subject | [PATCH 05/14] tty: core: Add helper fn to deref tty driver name | Date | Sun, 8 Nov 2015 13:01:12 -0500 |
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Similar to tty_name(), add tty_driver_name() helper to safely dereference tty->driver->name (otherwise return empty string).
Signed-off-by: Peter Hurley <peter@hurleysoftware.com> --- drivers/tty/tty_io.c | 7 +++++++ include/linux/tty.h | 1 + 2 files changed, 8 insertions(+)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index f463894..7a7b77d 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -256,6 +256,13 @@ const char *tty_name(const struct tty_struct *tty) EXPORT_SYMBOL(tty_name); +const char *tty_driver_name(const struct tty_struct *tty) +{ + if (!tty || !tty->driver) + return ""; + return tty->driver->name; +} + static int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, const char *routine) { diff --git a/include/linux/tty.h b/include/linux/tty.h index 0532465..a9c1af9 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -420,6 +420,7 @@ static inline struct tty_struct *tty_kref_get(struct tty_struct *tty) } extern const char *tty_name(const struct tty_struct *tty); +extern const char *tty_driver_name(const struct tty_struct *tty); extern void tty_wait_until_sent(struct tty_struct *tty, long timeout); extern int __tty_check_change(struct tty_struct *tty, int sig); extern int tty_check_change(struct tty_struct *tty); -- 2.6.3
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