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staging: gdm724x: Fix DMA from stack

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commit 7c3a0635cd upstream.

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>
This commit is contained in:
Amey Narkhede 2021-02-11 11:08:19 +05:30 committed by Greg Kroah-Hartman
parent 848c87e8d8
commit 4934db348d
1 changed files with 7 additions and 3 deletions
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10
drivers/staging/gdm724x/gdm_usb.c
View File

@ -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;
}