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 CF1BC16423; Tue, 27 Feb 2024 14:03:11 +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=1709042591; cv=none; b=fj3xvk54ctF4L2awLcHpHLXpHrfoI9nwDUKx5pH61lr/m6J2tF9dSr9rsbTBpVtGdncLGefyNVzD7TPiXqntfHNBUOKfkXxuxhBe+XbDANxtv7Wi/h33jgNMgWCC+qluZBCmCvi9u7cNgD2zNgCoR0lUCqyyHx4MfFhe1se4q7k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709042591; c=relaxed/simple; bh=3vm310UBcmN/IksbUHa0xy5OxH7YOrvAJJwQLScpLF4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VLWC2Oy+cc7CPLSkPXjjLFAs0hcbUXFI+DQHijxkIC2hTwd5i0cZG0Lnn4GuIs2I8tg/Yu9jWnsfeVdvPtiGSC/sFx5zUvA6v9lKFNfBW6EujRz3MyBQVfQ3ljIHG5RagAnludSH/nbzoPaLzP92Df0Yg/yRsn1InJvAtlLxx2Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UrGSCyDB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UrGSCyDB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C544C433F1; Tue, 27 Feb 2024 14:03:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709042591; bh=3vm310UBcmN/IksbUHa0xy5OxH7YOrvAJJwQLScpLF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UrGSCyDBYD5Gd0Pnnyi9XnRtDlBs4th1PqckoNgPt/0V2/Qu0Xes62C1JyNR2OJFj EDQFRtb+rkgeEYFCsC738JhQpsK6N8CQrmga+KzkNAad7XcaoR+p50H7u3zP3VJGKq 8APyH4cytzq+IIml4wgt/Jpx4KjbdxsgtACq9+1s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Christoph Hellwig , Daniel Wagner , Keith Busch , Sasha Levin Subject: [PATCH 5.15 049/245] nvmet-fc: take ref count on tgtport before delete assoc Date: Tue, 27 Feb 2024 14:23:57 +0100 Message-ID: <20240227131616.718514068@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240227131615.098467438@linuxfoundation.org> References: <20240227131615.098467438@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Wagner [ Upstream commit fe506a74589326183297d5abdda02d0c76ae5a8b ] We have to ensure that the tgtport is not going away before be have remove all the associations. Reviewed-by: Christoph Hellwig Signed-off-by: Daniel Wagner Signed-off-by: Keith Busch Signed-off-by: Sasha Levin --- drivers/nvme/target/fc.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 1ef075b159b9d..d3ca59ae4c7af 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -1092,13 +1092,28 @@ nvmet_fc_alloc_hostport(struct nvmet_fc_tgtport *tgtport, void *hosthandle) } static void -nvmet_fc_delete_assoc(struct work_struct *work) +nvmet_fc_delete_assoc(struct nvmet_fc_tgt_assoc *assoc) +{ + nvmet_fc_delete_target_assoc(assoc); + nvmet_fc_tgt_a_put(assoc); +} + +static void +nvmet_fc_delete_assoc_work(struct work_struct *work) { struct nvmet_fc_tgt_assoc *assoc = container_of(work, struct nvmet_fc_tgt_assoc, del_work); + struct nvmet_fc_tgtport *tgtport = assoc->tgtport; - nvmet_fc_delete_target_assoc(assoc); - nvmet_fc_tgt_a_put(assoc); + nvmet_fc_delete_assoc(assoc); + nvmet_fc_tgtport_put(tgtport); +} + +static void +nvmet_fc_schedule_delete_assoc(struct nvmet_fc_tgt_assoc *assoc) +{ + nvmet_fc_tgtport_get(assoc->tgtport); + queue_work(nvmet_wq, &assoc->del_work); } static struct nvmet_fc_tgt_assoc * @@ -1132,7 +1147,7 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *tgtport, void *hosthandle) assoc->a_id = idx; INIT_LIST_HEAD(&assoc->a_list); kref_init(&assoc->ref); - INIT_WORK(&assoc->del_work, nvmet_fc_delete_assoc); + INIT_WORK(&assoc->del_work, nvmet_fc_delete_assoc_work); atomic_set(&assoc->terminating, 0); while (needrandom) { @@ -1491,7 +1506,7 @@ __nvmet_fc_free_assocs(struct nvmet_fc_tgtport *tgtport) list_for_each_entry_rcu(assoc, &tgtport->assoc_list, a_list) { if (!nvmet_fc_tgt_a_get(assoc)) continue; - queue_work(nvmet_wq, &assoc->del_work); + nvmet_fc_schedule_delete_assoc(assoc); nvmet_fc_tgt_a_put(assoc); } rcu_read_unlock(); @@ -1545,7 +1560,7 @@ nvmet_fc_invalidate_host(struct nvmet_fc_target_port *target_port, continue; assoc->hostport->invalid = 1; noassoc = false; - queue_work(nvmet_wq, &assoc->del_work); + nvmet_fc_schedule_delete_assoc(assoc); nvmet_fc_tgt_a_put(assoc); } spin_unlock_irqrestore(&tgtport->lock, flags); @@ -1590,7 +1605,7 @@ nvmet_fc_delete_ctrl(struct nvmet_ctrl *ctrl) nvmet_fc_tgtport_put(tgtport); if (found_ctrl) { - queue_work(nvmet_wq, &assoc->del_work); + nvmet_fc_schedule_delete_assoc(assoc); nvmet_fc_tgt_a_put(assoc); return; } @@ -1897,7 +1912,7 @@ nvmet_fc_ls_disconnect(struct nvmet_fc_tgtport *tgtport, nvmet_fc_xmt_ls_rsp(tgtport, oldls); } - queue_work(nvmet_wq, &assoc->del_work); + nvmet_fc_schedule_delete_assoc(assoc); nvmet_fc_tgt_a_put(assoc); return false; -- 2.43.0