[PATCH 4.19 13/33] usbnet: fix memory allocation in helpers

[Greg Kroah-Hartman]

From: Oliver Neukum <oneukum@xxxxxxxx>

commit e65af5403e462ccd7dff6a045a886c64da598c2e upstream.

usbnet provides some helper functions that are also used in
the context of reset() operations. During a reset the other
drivers on a device are unable to operate. As that can be block
drivers, a driver for another interface cannot use paging
in its memory allocations without risking a deadlock.
Use GFP_NOIO in the helpers.

Fixes: 877bd862f32b8 ("usbnet: introduce usbnet 3 command helpers")
Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx>
Link: https://lore.kernel.org/r/20220628093517.7469-1-oneukum@xxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/usb/usbnet.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1998,7 +1998,7 @@ static int __usbnet_read_cmd(struct usbn
 		   cmd, reqtype, value, index, size);
 
 	if (size) {
-		buf = kmalloc(size, GFP_KERNEL);
+		buf = kmalloc(size, GFP_NOIO);
 		if (!buf)
 			goto out;
 	}
@@ -2030,7 +2030,7 @@ static int __usbnet_write_cmd(struct usb
 		   cmd, reqtype, value, index, size);
 
 	if (data) {
-		buf = kmemdup(data, size, GFP_KERNEL);
+		buf = kmemdup(data, size, GFP_NOIO);
 		if (!buf)
 			goto out;
 	} else {