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| author | Tilman Schmidt <tilman@imap.cc> | 2010-07-05 14:18:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-22 11:00:18 -0800 |
| commit | e3a8550880f75c4ca34ac8009b8d8190d36d5c0b (patch) | |
| tree | 7fa310a591ccca702baba8ded858effae75be7e9 | |
| parent | 29d818b400cb9b0a221e1d7d8682e264f24b772e (diff) | |
| download | lwn-e3a8550880f75c4ca34ac8009b8d8190d36d5c0b.tar.gz lwn-e3a8550880f75c4ca34ac8009b8d8190d36d5c0b.zip | |
isdn: avoid calling tty_ldisc_flush() in atomic context
commit bc10f96757bd6ab3721510df8defa8f21c32f974 upstream.
Remove the call to tty_ldisc_flush() from the RESULT_NO_CARRIER
branch of isdn_tty_modem_result(), as already proposed in commit
00409bb045887ec5e7b9e351bc080c38ab6bfd33.
This avoids a "sleeping function called from invalid context" BUG
when the hardware driver calls the statcallb() callback with
command==ISDN_STAT_DHUP in atomic context, which in turn calls
isdn_tty_modem_result(RESULT_NO_CARRIER, ~), and from there,
tty_ldisc_flush() which may sleep.
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/isdn/i4l/isdn_tty.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index fc8454d2eea5..51dc60da333b 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -2636,12 +2636,6 @@ isdn_tty_modem_result(int code, modem_info * info) if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) { return; } -#ifdef CONFIG_ISDN_AUDIO - if ( !info->vonline ) - tty_ldisc_flush(info->tty); -#else - tty_ldisc_flush(info->tty); -#endif if ((info->flags & ISDN_ASYNC_CHECK_CD) && (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) && (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) { |