tty: serial: Use GFP_ATOMIC instead of GFP_KERNEL in serial8250_em485_init()
authorMatwey V. Kornilov <matwey@sai.msu.ru>
Fri, 19 Feb 2016 05:29:10 +0000 (08:29 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 8 Mar 2016 00:11:14 +0000 (16:11 -0800)
commitb18a183eaac25bd8dc51eab85437c7253f5c31d1
tree05a585eaed87435fa6a845840b602d8bb69f59f9
parentbf2a0be45ffc5ab706f9be71a2cdc3f4600cb444
tty: serial: Use GFP_ATOMIC instead of GFP_KERNEL in serial8250_em485_init()

serial8250_em485_init() is supposed to be protected with
p->port.lock spinlock.
This may lead to issues when kmalloc sleeps, so it is better to use
GFP_ATOMIC in this spinlocked context.

Fixes: e490c9144cfa ("tty: Add software emulated RS485 support for 8250")
Reported-by: Ильяс Гасанов <torso.nafi@gmail.com>
Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/8250/8250_port.c