Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933085AbbGSTSj (ORCPT ); Sun, 19 Jul 2015 15:18:39 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38793 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932684AbbGSTSe (ORCPT ); Sun, 19 Jul 2015 15:18:34 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bart Van Assche , James Bottomley , Sagi Grimberg , Sebastian Parschauer , Doug Ledford Subject: [PATCH 4.0 44/58] scsi_transport_srp: Fix a race condition Date: Sun, 19 Jul 2015 12:11:22 -0700 Message-Id: <20150719190812.727454166@linuxfoundation.org> X-Mailer: git-send-email 2.4.6 In-Reply-To: <20150719190811.308546345@linuxfoundation.org> References: <20150719190811.308546345@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2199 Lines: 60 4.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bart Van Assche commit 535fb906225fb7436cb658144d0c0cea14a26f3e upstream. Avoid that srp_terminate_io() can get invoked while srp_queuecommand() is in progress. This patch avoids that an I/O timeout can trigger the following kernel warning: WARNING: at drivers/infiniband/ulp/srp/ib_srp.c:1447 srp_terminate_io+0xef/0x100 [ib_srp]() Call Trace: [] dump_stack+0x4e/0x68 [] warn_slowpath_common+0x81/0xa0 [] warn_slowpath_null+0x1a/0x20 [] srp_terminate_io+0xef/0x100 [ib_srp] [] __rport_fail_io_fast+0xba/0xc0 [scsi_transport_srp] [] rport_fast_io_fail_timedout+0xe0/0xf0 [scsi_transport_srp] [] process_one_work+0x1db/0x780 [] worker_thread+0x11b/0x450 [] kthread+0xe4/0x100 [] ret_from_fork+0x7c/0xb0 See also patch "scsi_transport_srp: Add transport layer error handling" (commit ID 29c17324803c). Signed-off-by: Bart Van Assche Cc: James Bottomley Cc: Sagi Grimberg Cc: Sebastian Parschauer Signed-off-by: Doug Ledford Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/scsi_transport_srp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/scsi/scsi_transport_srp.c +++ b/drivers/scsi/scsi_transport_srp.c @@ -439,8 +439,10 @@ static void __rport_fail_io_fast(struct /* Involve the LLD if possible to terminate all I/O on the rport. */ i = to_srp_internal(shost->transportt); - if (i->f->terminate_rport_io) + if (i->f->terminate_rport_io) { + srp_wait_for_queuecommand(shost); i->f->terminate_rport_io(rport); + } } /** -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/