From: bugzilla-daemon@kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 215945] New: No way to get user buffer in ll_driver->raw_request of hid driver sent via hidraw HIDIOCGFEATURE
Date: Thu, 05 May 2022 14:15:22 +0000 [thread overview]
Message-ID: <bug-215945-208809@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=215945
Bug ID: 215945
Summary: No way to get user buffer in ll_driver->raw_request of
hid driver sent via hidraw HIDIOCGFEATURE
Product: Drivers
Version: 2.5
Kernel Version: 5.17.5
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: USB
Assignee: drivers_usb@kernel-bugs.kernel.org
Reporter: ga2mer@yandex.ru
Regression: No
I am writing support in the custom hid driver for the screen built into the
Thrustmaster T248 steering wheel.
Unfortunately, I can't send what I want in any way and I have to repeat the
flow of their Windows Kernel Driver.
They use a dll to communicate with the screen, which sends a feature report via
HidD_GetFeature, which is sent to their kernel driver and they use one report
id per bunch of actions:
ef 75 .. .. ..
ef 17 .. .. ..
ef 7d .. .. ..
And unfortunately (as I understood from the source code) hidraw_get_report
sends an empty buffer to my raw_request and I can't understand what this report
about.
It would be nice if it was possible to take the user buffer from somewhere.
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reply other threads:[~2022-05-05 14:15 UTC|newest]
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