Re: [PATCH v3] HID: Add full support for Logitech Unifying receivers

On Thu, Sep 01, 2011 at 02:43:32PM +0200, Benjamin Tissoires wrote:

quoted

+
+       usbhid_submit_report(dj_rcv_hiddev, &report, USB_DIR_OUT);

This is not working when the receiver is paired to a keyboard. When
the session launches, Gnome try to send leds commands to the keyboard
and this results in an oops.

Using a  pointer to the struct hid_report solves the crash.

However, Dmitry, you told us about a DMA stack problem. Can you give
us a better way to handle that?

Actually it is OK, usbhid_submit_report internally allocates DMA_safe
memory for raw report and copies the data for you.

Thanks.

-- 
Dmitry
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