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Subject[PATCH] staging: gdm724x: Fix DMA from stack
Date
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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