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 CD5B313AC5 for ; Mon, 26 Jun 2023 18:26:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A383C433CA; Mon, 26 Jun 2023 18:26:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687803992; bh=zLFmXR4yc5DU/V5y29p2DeWsmiV4dH7qGzetBSpoCIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uw074w/ptesdCbPWzTguxvTrEMim7E0+THuAnBR+AWXytnHR/ezkBgPCPMfjeVTou mEATQLVqNuNKOZxU1ptkERzhAVQTQMxgNsdDi8F40rIBCReLQevOPX8Itv/5FIj1wV AXLyr0dUNckHrO0nY8coA+aG9ckg1R26zeIzgY3E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vineeth Vijayan , Peter Oberparleiter , Alexander Gordeev , Sasha Levin Subject: [PATCH 4.19 35/41] s390/cio: unregister device when the only path is gone Date: Mon, 26 Jun 2023 20:11:58 +0200 Message-ID: <20230626180737.581146563@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180736.243379844@linuxfoundation.org> References: <20230626180736.243379844@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Vineeth Vijayan [ Upstream commit 89c0c62e947a01e7a36b54582fd9c9e346170255 ] Currently, if the device is offline and all the channel paths are either configured or varied offline, the associated subchannel gets unregistered. Don't unregister the subchannel, instead unregister offline device. Signed-off-by: Vineeth Vijayan Reviewed-by: Peter Oberparleiter Signed-off-by: Alexander Gordeev Signed-off-by: Sasha Levin --- drivers/s390/cio/device.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index c9bc9a6bd73b7..ee4338158ae2e 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -1353,6 +1353,7 @@ void ccw_device_set_notoper(struct ccw_device *cdev) enum io_sch_action { IO_SCH_UNREG, IO_SCH_ORPH_UNREG, + IO_SCH_UNREG_CDEV, IO_SCH_ATTACH, IO_SCH_UNREG_ATTACH, IO_SCH_ORPH_ATTACH, @@ -1385,7 +1386,7 @@ static enum io_sch_action sch_get_action(struct subchannel *sch) } if ((sch->schib.pmcw.pam & sch->opm) == 0) { if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) - return IO_SCH_UNREG; + return IO_SCH_UNREG_CDEV; return IO_SCH_DISC; } if (device_is_disconnected(cdev)) @@ -1447,6 +1448,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process) case IO_SCH_ORPH_ATTACH: ccw_device_set_disconnected(cdev); break; + case IO_SCH_UNREG_CDEV: case IO_SCH_UNREG_ATTACH: case IO_SCH_UNREG: if (!cdev) @@ -1480,6 +1482,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process) if (rc) goto out; break; + case IO_SCH_UNREG_CDEV: case IO_SCH_UNREG_ATTACH: spin_lock_irqsave(sch->lock, flags); if (cdev->private->flags.resuming) { -- 2.39.2