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authorTilman Schmidt <tilman@imap.cc>2010-07-05 14:18:27 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2010-11-22 11:00:18 -0800
commite3a8550880f75c4ca34ac8009b8d8190d36d5c0b (patch)
tree7fa310a591ccca702baba8ded858effae75be7e9
parent29d818b400cb9b0a221e1d7d8682e264f24b772e (diff)
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.c6
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)))) {