Messages in this thread Patch in this message |  | | From | ameynarkhede03@gmail ... | Subject | [PATCH] staging: gdm724x: Fix DMA from stack | Date | Tue, 9 Feb 2021 20:24:15 +0530 |
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From: Amey Narkhede <ameynarkhede03@gmail.com>
Stack allocated buffers cannot be used for DMA on all architectures so allocate usbdev buffer using kmalloc().
Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com> --- drivers/staging/gdm724x/gdm_usb.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/gdm724x/gdm_usb.c b/drivers/staging/gdm724x/gdm_usb.c index dc4da66c3..50dc463d4 100644 --- a/drivers/staging/gdm724x/gdm_usb.c +++ b/drivers/staging/gdm724x/gdm_usb.c @@ -56,7 +56,7 @@ static int gdm_usb_recv(void *priv_dev,
static int request_mac_address(struct lte_udev *udev) { - u8 buf[16] = {0,}; + u8 *buf; struct hci_packet *hci = (struct hci_packet *)buf; struct usb_device *usbdev = udev->usbdev; int actual; @@ -66,6 +66,10 @@ static int request_mac_address(struct lte_udev *udev) hci->len = gdm_cpu_to_dev16(udev->gdm_ed, 1); hci->data[0] = MAC_ADDRESS;
+ buf = kmalloc(16, GFP_KERNEL); + if (!buf) + return -ENOMEM; + ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5, &actual, 1000);
-- 2.30.0
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