diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:53:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:45 -0700 |
| commit | 978e595f88a1fba5869aa42a4af4fba36f33ecac (patch) | |
| tree | 60848f49949c5b7b518621ee36cdc6d500244539 /drivers/char/synclinkmp.c | |
| parent | ac0e4b7d319bf284bb64bc7e1c051417386b34a4 (diff) | |
tty/serial: lay the foundations for the next set of reworks
- Stop drivers calling their own flush method indirectly, it obfuscates code
and it will change soon anyway
- A few more lock_kernel paths temporarily needed in some driver internal
waiting code
- Remove private put_char method that does a write call for one char - we
have that anyway
- Most but not yet all of the termios copy under lock fixing (some has other
dependencies to follow)
- Note a few locking bugs in drivers found in the process
- Kill remaining [ab]users of TIOCG/SSOFTCAR in the driver, these must go to
fix the termios locking
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/synclinkmp.c')
| -rw-r--r-- | drivers/char/synclinkmp.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c index b716a73a236..2f1988c48ee 100644 --- a/drivers/char/synclinkmp.c +++ b/drivers/char/synclinkmp.c @@ -862,8 +862,7 @@ static void close(struct tty_struct *tty, struct file *filp) if (info->flags & ASYNC_INITIALIZED) wait_until_sent(tty, info->timeout); - if (tty->driver->flush_buffer) - tty->driver->flush_buffer(tty); + flush_buffer(tty); tty_ldisc_flush(tty); @@ -1119,6 +1118,8 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) if (sanity_check(info, tty->name, "wait_until_sent")) return; + lock_kernel(); + if (!(info->flags & ASYNC_INITIALIZED)) goto exit; @@ -1161,6 +1162,7 @@ static void wait_until_sent(struct tty_struct *tty, int timeout) } exit: + unlock_kernel(); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s wait_until_sent() exit\n", __FILE__,__LINE__, info->device_name ); @@ -1176,6 +1178,7 @@ static int write_room(struct tty_struct *tty) if (sanity_check(info, tty->name, "write_room")) return 0; + lock_kernel(); if (info->params.mode == MGSL_MODE_HDLC) { ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; } else { @@ -1183,6 +1186,7 @@ static int write_room(struct tty_struct *tty) if (ret < 0) ret = 0; } + unlock_kernel(); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s write_room()=%d\n", |