From: Tilman Schmidt <tilman@imap.cc>
Date: Mon, 5 Jul 2010 14:18:27 +0000 (+0000)
Subject: isdn: avoid calling tty_ldisc_flush() in atomic context
X-Git-Tag: v2.6.36-rc1~571^2~336
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc10f96757bd6ab3721510df8defa8f21c32f974;p=pandora-kernel.git

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 <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
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