From: Greg KH <gregkh@linuxfoundation.org>
To: Wentao Guan <guanwentao@uniontech.com>
Cc: oneukum@suse.com, carvsdriver@gmail.com,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH RFC] USB: cdc-acm: Fix bit overlap and move quirk definitions to header
Date: Thu, 21 May 2026 16:55:00 +0200 [thread overview]
Message-ID: <2026052144-unwritten-washing-df27@gregkh> (raw)
In-Reply-To: <20260506093213.1473262-1-guanwentao@uniontech.com>
On Wed, May 06, 2026 at 05:32:13PM +0800, Wentao Guan wrote:
> The VENDOR_CLASS_DATA_IFACE and ALWAYS_POLL_CTRL quirk flags added in
> commit f58752ebcb35 ("USB: cdc-acm: Add quirks for Yoga Book 9 14IAH10
> INGENIC touchscreen") were placed inside the acm_ctrl_msg() function
> rather than in the header with the other quirk flags. Then, their
> values (BIT(9) and BIT(10)) collided with NO_UNION_12 which is already
> BIT(9).
>
> Move the definitions to drivers/usb/class/cdc-acm.h where they belong
> and shift them to BIT(10) and BIT(11) to avoid the overlap.
>
> Fixes: f58752ebcb35 ("USB: cdc-acm: Add quirks for Yoga Book 9 14IAH10 INGENIC touchscreen")
> Cc: stable@vger.kernel.org
Why is this needed for stable? What bug does this "fix"?
thanks,
greg k-h
next prev parent reply other threads:[~2026-05-21 14:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-06 9:32 [PATCH RFC] USB: cdc-acm: Fix bit overlap and move quirk definitions to header Wentao Guan
2026-05-21 14:55 ` Greg KH [this message]
2026-05-21 15:03 ` Wentao Guan
2026-05-22 4:45 ` Greg KH
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