usbnet: fix memory allocation in helpers

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@suse.com>
Link: https://lore.kernel.org/r/20220628093517.7469-1-oneukum@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index af2bbaf..a0ea236 100644 (file)
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -2002,7 +2002,7 @@ static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
                   cmd, reqtype, value, index, size);
 
        if (size) {
-               buf = kmalloc(size, GFP_KERNEL);
+               buf = kmalloc(size, GFP_NOIO);
                if (!buf)
                        goto out;
        }
@@ -2034,7 +2034,7 @@ static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
                   cmd, reqtype, value, index, size);
 
        if (data) {
-               buf = kmemdup(data, size, GFP_KERNEL);
+               buf = kmemdup(data, size, GFP_NOIO);
                if (!buf)
                        goto out;
        } else {