From: bugzilla-daemon@kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported
Date: Sun, 12 Nov 2023 20:46:08 +0000 [thread overview]
Message-ID: <bug-215740-208809-VLdvnLcas6@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-215740-208809@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=215740
--- Comment #9 from Ferry Toth (ferry.toth@elsinga.info) ---
Ok, it's different then in #6 above.
smsc95xx behaves as a 5p hub, with an usb to ethernet adapter plugged into 1
port. So, 4 ports remain available to the user. The bug itself is likely
located in hub.c.
I can reproduce this with an ordinary 7p hub (EVB USB2517). Plugging the hub
causes no issues. Then plugging an usb device (in my case I just plugged a
mouse) into a port triggers the "cacheline tracking EEXIST".
The warning occurs only once (regardless unplugging the device or the hub).
Note that on Ubuntu 23.10 the warning does not occur, but they have most debug
options not set. So, likely this is an old bug that has gone undetected for a
long while.
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next prev parent reply other threads:[~2023-11-12 20:46 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 15:18 [Bug 215740] New: kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported bugzilla-daemon
2022-03-31 6:52 ` [Bug 215740] " bugzilla-daemon
2022-03-31 6:54 ` bugzilla-daemon
2022-03-31 7:41 ` [Bug 215740] New: " Thorsten Leemhuis
2022-04-05 5:19 ` Christoph Hellwig
2022-03-31 7:41 ` [Bug 215740] " bugzilla-daemon
2022-03-31 7:54 ` bugzilla-daemon
2022-04-05 5:19 ` bugzilla-daemon
2022-05-04 8:10 ` bugzilla-daemon
2022-05-04 10:17 ` bugzilla-daemon
2023-10-10 20:19 ` bugzilla-daemon
2023-11-12 20:46 ` bugzilla-daemon [this message]
2023-11-13 22:11 ` bugzilla-daemon
2023-11-14 3:25 ` bugzilla-daemon
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