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| author | Matwey V. Kornilov <matwey@sai.msu.ru> | 2016-02-19 08:29:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-07 16:11:14 -0800 |
| commit | b18a183eaac25bd8dc51eab85437c7253f5c31d1 (patch) | |
| tree | 05a585eaed87435fa6a845840b602d8bb69f59f9 /drivers/tty | |
| parent | bf2a0be45ffc5ab706f9be71a2cdc3f4600cb444 (diff) | |
| download | lwn-b18a183eaac25bd8dc51eab85437c7253f5c31d1.tar.gz lwn-b18a183eaac25bd8dc51eab85437c7253f5c31d1.zip | |
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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index e376cfaf8ab7..2ffda79a462a 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -588,7 +588,7 @@ int serial8250_em485_init(struct uart_8250_port *p) if (p->em485 != NULL) return 0; - p->em485 = kmalloc(sizeof(struct uart_8250_em485), GFP_KERNEL); + p->em485 = kmalloc(sizeof(struct uart_8250_em485), GFP_ATOMIC); if (p->em485 == NULL) return -ENOMEM; |