usb: gadget: f_hid: fix report descriptor allocation

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commit 61890dc28f upstream.

The commit 89ff3dfac6 ("usb: gadget: f_hid: fix f_hidg lifetime vs
cdev") has introduced a bug that leads to hid device corruption after
the replug operation.
Reverse device managed memory allocation for the report descriptor
to fix the issue.

Tested:
This change was tested on the AMD EthanolX CRB server with the BMC
based on the OpenBMC distribution. The BMC provides KVM functionality
via the USB gadget device:
- before: KVM page refresh results in a broken USB device,
- after: KVM page refresh works without any issues.

Fixes: 89ff3dfac6 ("usb: gadget: f_hid: fix f_hidg lifetime vs cdev")
Cc: stable@vger.kernel.org
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Link: https://lore.kernel.org/r/20231206080744.253-2-aladyshev22@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Konstantin Aladyshev 2023-12-06 11:07:44 +03:00 • committed by Greg Kroah-Hartman

parent c8bf22e0d0

commit 16da1f84f5

1 changed files with 4 additions and 3 deletions

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drivers/usb/gadget/function/f_hid.c

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