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| author | Arnd Bergmann <arnd@arndb.de> | 2010-06-01 22:53:10 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 13:47:44 -0700 |
| commit | e142a31da34b42458e10026b554e66127739cf23 (patch) | |
| tree | 1f65a42cd559116223e1fa1db7631cd449c73968 /drivers/char/ip2 | |
| parent | b07471fa51358ce64cc25e1501544502362e4404 (diff) | |
| download | linux-3.10-e142a31da34b42458e10026b554e66127739cf23.tar.gz linux-3.10-e142a31da34b42458e10026b554e66127739cf23.tar.bz2 linux-3.10-e142a31da34b42458e10026b554e66127739cf23.zip | |
tty: release BTM while sleeping in block_til_ready
Most tty drivers may block while opening a device.
Since this possibly depends on another thread
closing it first and both threads may need the BTM,
we need to release it here.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char/ip2')
| -rw-r--r-- | drivers/char/ip2/ip2main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c index 911e1da6def..07f3ea38b58 100644 --- a/drivers/char/ip2/ip2main.c +++ b/drivers/char/ip2/ip2main.c @@ -1486,7 +1486,9 @@ ip2_open( PTTY tty, struct file *pFile ) if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) { if ( pCh->flags & ASYNC_CLOSING ) { + tty_unlock(); schedule(); + tty_lock(); } if ( tty_hung_up_p(pFile) ) { set_current_state( TASK_RUNNING ); @@ -1548,7 +1550,9 @@ ip2_open( PTTY tty, struct file *pFile ) rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS); break; } + tty_unlock(); schedule(); + tty_lock(); } set_current_state( TASK_RUNNING ); remove_wait_queue(&pCh->open_wait, &wait); |