From: Amey Narkhede <ameynarkhed...@gmail.com> commit 7c3a0635cd008eaca9a734dc802709ee0b81cac5 upstream.
Stack allocated buffers cannot be used for DMA on all architectures so allocate hci_packet buffer using kmalloc. Reviewed-by: Dan Carpenter <dan.carpen...@oracle.com> Signed-off-by: Amey Narkhede <ameynarkhed...@gmail.com> Link: https://lore.kernel.org/r/20210211053819.34858-1-ameynarkhed...@gmail.com Cc: stable <sta...@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/staging/gdm724x/gdm_usb.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/staging/gdm724x/gdm_usb.c +++ b/drivers/staging/gdm724x/gdm_usb.c @@ -56,20 +56,24 @@ static int gdm_usb_recv(void *priv_dev, static int request_mac_address(struct lte_udev *udev) { - u8 buf[16] = {0,}; - struct hci_packet *hci = (struct hci_packet *)buf; + struct hci_packet *hci; struct usb_device *usbdev = udev->usbdev; int actual; int ret = -1; + hci = kmalloc(struct_size(hci, data, 1), GFP_KERNEL); + if (!hci) + return -ENOMEM; + hci->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_GET_INFORMATION); hci->len = gdm_cpu_to_dev16(udev->gdm_ed, 1); hci->data[0] = MAC_ADDRESS; - ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5, + ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), hci, 5, &actual, 1000); udev->request_mac_addr = 1; + kfree(hci); return ret; }
