diff options
| author | Amey Narkhede <ameynarkhede03@gmail.com> | 2021-02-11 11:08:19 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-11 11:08:17 +0100 |
| commit | 7c3a0635cd008eaca9a734dc802709ee0b81cac5 (patch) | |
| tree | 67fe052e8124244d3f26470d509721522a28a1fd /drivers | |
| parent | 588007fb8ff8b09508dbfe39c0a8697b3cc2bfae (diff) | |
staging: gdm724x: Fix DMA from stack
Stack allocated buffers cannot be used for DMA
on all architectures so allocate hci_packet buffer
using kmalloc.
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
Link: https://lore.kernel.org/r/20210211053819.34858-1-ameynarkhede03@gmail.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/gdm724x/gdm_usb.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/staging/gdm724x/gdm_usb.c b/drivers/staging/gdm724x/gdm_usb.c index dc4da66c3695..54bdb64f52e8 100644 --- 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; } |