From: Jiri Slaby Date: Wed, 23 Mar 2011 09:48:36 +0000 (+0100) Subject: TTY: plug in deinitialize_tty_struct X-Git-Tag: upstream/snapshot3+hdmi~10347^2~34 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a9dccddb60913056bcadaeeacfe0395447fd2472;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git TTY: plug in deinitialize_tty_struct Used the newly introduced deinitialize_tty_struct to properly shut down ldisc. It is intended to fix the Julian's reported problem. He reports that kmemleak checker warns about memory leak: unreferenced object 0xc0e19860 (size 8): comm cat, pid 1226, jiffies 4294919464 (age 287.476s) hex dump (first 8 bytes): 44 de 2d c1 01 00 00 00 D.-..... backtrace: [] create_object+0x109/0x1ad [] kmem_cache_alloc+0x60/0x68 [] tty_ldisc_get+0x54/0x76 [] tty_ldisc_init+0xa/0x20 [] initialize_tty_struct+0x2d/0x1ac [] tty_init_dev+0x59/0x10d [] tty_open+0x24a/0x3a2 ... Signed-off-by: Jiri Slaby Cc: Alan Cox Reported-by: Julian Anastasov Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index b25d6c4..21bddf3 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -304,7 +304,7 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) the easy way .. */ retval = tty_init_termios(tty); if (retval) - goto err_module_put; + goto err_deinit_tty; retval = tty_init_termios(o_tty); if (retval) @@ -327,7 +327,8 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) return 0; err_free_termios: tty_free_termios(tty); -err_module_put: +err_deinit_tty: + deinitialize_tty_struct(o_tty); module_put(o_tty->driver->owner); err_free_tty: free_tty_struct(o_tty); @@ -592,6 +593,7 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) pty_count++; return 0; err_free_mem: + deinitialize_tty_struct(o_tty); kfree(o_tty->termios); kfree(tty->termios); module_put(o_tty->driver->owner); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index f5dd235..8540f2b 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1399,7 +1399,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, retval = tty_driver_install_tty(driver, tty); if (retval < 0) - goto err_free_tty; + goto err_deinit_tty; /* * Structures all installed ... call the ldisc open routines. @@ -1411,7 +1411,8 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, goto err_release_tty; return tty; -err_free_tty: +err_deinit_tty: + deinitialize_tty_struct(tty); free_tty_struct(tty); err_module_put: module_put(driver->owner);