From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4E71B1C68F for ; Tue, 9 Sep 2025 21:16:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757452587; cv=none; b=AqA3E4NVcbvYKXvJ3v28yL1Wcr1/1Cyc1/h/mw6iF/L9opbYmC/SPCIcXhA35fKcu1/WsiCjGgbgcSPz0vWvJFPyxhuogBj7+8INgGlBlqZCoAWI1XOF6EszYQLE2eJPSlthrrUkPTOk456PsqxFzvmWiYG5Giq2nRIaYcLABD0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757452587; c=relaxed/simple; bh=5KFUyCUtRozKEBd1I1Tvh0Jn9MZriF2eUaNMkE9RULk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=VQYm0WQEHSVFqnZrSG6ua9ECsxXq+3TM1G4H/959LxQxYe9a7wZIWr7db+4c5Q83GWBacRm3Mb7lVyMFtzufYjIbNssR6Vd9EIUdd99UFyl8A9bzr/u9zrrKsLHAnGMMAmzO5SNfXMUMpGCmwCZJs9DHf7GqQL/onnn3736mwbg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qnhv7Rt0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qnhv7Rt0" Received: by smtp.kernel.org (Postfix) with ESMTPS id D18B0C4CEF8 for ; Tue, 9 Sep 2025 21:16:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757452586; bh=5KFUyCUtRozKEBd1I1Tvh0Jn9MZriF2eUaNMkE9RULk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=qnhv7Rt0N0pOQudeg5SeyVJWzqPIB5goJbKg2QScoZcPRVYF7uqboGWx7SmgNfmAA t9eN5OIXVK7LvRMyhXyOBj23s/bEjHISsUBUzgFNs3gBVokuP8LL7J51CGAZrZZaaS 3LWx73vAkpZNQ+dkC17ERylmyd+fzDtyTCUt1cAlSDNCBX+2dm+GwgoMXdFotMhE1R J3xjoXSlsPg3OaUVn5yoU0JWcJi8QYpTB+aO8BgmYiqnCCduWCgI9/w51u51yTFkbf gzYVjCPc5IOA01Rl+wMl2WqJC/MQ/pYI8aeXV+oh0vYDApvsq7nuTVaxpRVjE2nyMW +QJadApdV6c+w== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id C064BC41612; Tue, 9 Sep 2025 21:16:26 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 220491] usb_storage connected SD card disconnects/reconnects on resume from suspend Date: Tue, 09 Sep 2025 21:16:26 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paula@alumni.cse.ucsc.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220491 --- Comment #53 from Paul Ausbeck (paula@alumni.cse.ucsc.edu) --- Created attachment 308646 --> https://bugzilla.kernel.org/attachment.cgi?id=3D308646&action=3Dedit kdb triggered disconnect, dmesg tail I have correlated disconnection of the USB connected SD card with stalling = the kernel with kdb. Thus far, a long kdb stall, perhaps as long as overnight, = is necessary for the SD card to disconnect upon resuming kernel operation. Interestingly, the disconnection is not immediate, minutes elapse between kernel resumption and device disconnection. Also interesting is that once t= he device starts disconnecting, it will disconnect several times, maybe indefinitely, with several minutes elapsed time between each hit of the usb_disconnect breakpoint. When the usb_disconnect breakpoint it hit, backt= race shows hub_event as the calling routine. The attached file is a dmesg fragment starting upon kernel resumption via t= he kdb "go" command. The previous attachment is a usbmon trace of the same activity period. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=