From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ricardo Ribalda Delgado <ribalda@chromium.org>
Cc: Mathias Nyman <mathias.nyman@intel.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Stephen Boyd <swboyd@chromium.org>
Subject: Re: [PATCH] xhci: Do not create endpoint debugfs while holding the bandwidth mutex
Date: Wed, 31 May 2023 14:10:02 +0100 [thread overview]
Message-ID: <2023053152-pegboard-oncoming-18ce@gregkh> (raw)
In-Reply-To: <20230531-xhci-deadlock-v1-1-57780bff5124@chromium.org>
On Wed, May 31, 2023 at 02:40:02PM +0200, Ricardo Ribalda Delgado wrote:
> xhci_debugfs_create_endpoint needs to take the mm->mmap_sem, which is
> not serialized with the hcd->bandwidth_mutex across the codebase.
>
> Without this patch a deadlock has been observed with the uvc driver at
> the functions v4l2_mmap() and usb_set_interface().
>
> Cc: Stephen Boyd <swboyd@chromium.org
Missing ">" :(
next prev parent reply other threads:[~2023-05-31 13:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 12:40 [PATCH] xhci: Do not create endpoint debugfs while holding the bandwidth mutex Ricardo Ribalda Delgado
2023-05-31 13:10 ` Greg Kroah-Hartman [this message]
2023-06-01 13:45 ` Mathias Nyman
2023-06-01 16:05 ` Ricardo Ribalda
2023-06-12 14:30 ` Mathias Nyman
2023-06-17 12:09 ` Ricardo Ribalda
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