From bc10f96757bd6ab3721510df8defa8f21c32f974 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Mon, 5 Jul 2010 14:18:27 +0000 Subject: [PATCH] isdn: avoid calling tty_ldisc_flush() in atomic context 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 Signed-off-by: David S. Miller --- drivers/isdn/i4l/isdn_tty.c | 6 ------ 1 file changed, 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)))) { -- 2.20.1