From: Johan Hovold <jo...@kernel.org>
3.4.106-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit 191252837626fca0de694c18bb2aa64c118eda89 upstream.
Write may be called from interrupt context so make sure to use
GFP_ATOMIC for all allocations in write.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <jo...@kernel.org>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lize...@huawei.com>
---
drivers/usb/serial/kobil_sct.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index 4a9a75e..c3a53ac 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -447,7 +447,7 @@ static int kobil_write(struct tty_struct *tty, struct
usb_serial_port *port,
);
priv->cur_pos = priv->cur_pos + length;
- result = usb_submit_urb(port->write_urb, GFP_NOIO);
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
dbg("%s - port %d Send write URB returns: %i",
__func__, port->number, result);
todo = priv->filled - priv->cur_pos;
@@ -463,7 +463,7 @@ static int kobil_write(struct tty_struct *tty, struct
usb_serial_port *port,
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
result = usb_submit_urb(port->interrupt_in_urb,
- GFP_NOIO);
+ GFP_ATOMIC);
dbg("%s - port %d Send read URB returns: %i",
__func__, port->number, result);
}
--
1.9.1
--
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