From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754006Ab3BUTgV (ORCPT ); Thu, 21 Feb 2013 14:36:21 -0500 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:54871 "EHLO p3plsmtps2ded02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753054Ab3BUTgR (ORCPT ); Thu, 21 Feb 2013 14:36:17 -0500 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, ohering@suse.com, jbottomley@parallels.com, hch@infradead.org, linux-scsi@vger.kernel.org Cc: "K. Y. Srinivasan" Subject: [PATCH 4/4] Drivers: scsi: storvsc: Handle dynamic resizing of the device Date: Thu, 21 Feb 2013 12:04:53 -0800 Message-Id: <1361477093-17549-4-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1361477093-17549-1-git-send-email-kys@microsoft.com> References: <1361477060-17505-1-git-send-email-kys@microsoft.com> <1361477093-17549-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Handle LUN size changes by re-scanning the device. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang --- drivers/scsi/storvsc_drv.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 16d5aac..16a3a0c 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -201,6 +201,7 @@ enum storvsc_request_type { #define SRB_STATUS_AUTOSENSE_VALID 0x80 #define SRB_STATUS_INVALID_LUN 0x20 #define SRB_STATUS_SUCCESS 0x01 +#define SRB_STATUS_ABORTED 0x02 #define SRB_STATUS_ERROR 0x04 /* @@ -295,6 +296,25 @@ struct storvsc_scan_work { uint lun; }; +static void storvsc_device_scan(struct work_struct *work) +{ + struct storvsc_scan_work *wrk; + uint lun; + struct scsi_device *sdev; + + wrk = container_of(work, struct storvsc_scan_work, work); + lun = wrk->lun; + + sdev = scsi_device_lookup(wrk->host, 0, 0, lun); + if (!sdev) + goto done; + scsi_rescan_device(&sdev->sdev_gendev); + scsi_device_put(sdev); + +done: + kfree(wrk); +} + static void storvsc_bus_scan(struct work_struct *work) { struct storvsc_scan_work *wrk; @@ -791,7 +811,18 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb, do_work = true; process_err_fn = storvsc_remove_lun; break; + case (SRB_STATUS_ABORTED | SRB_STATUS_AUTOSENSE_VALID): + if ((asc == 0x2a) && (ascq == 0x9)) { + do_work = true; + process_err_fn = storvsc_device_scan; + /* + * Retry the I/O that trigerred this. + */ + set_host_byte(scmnd, DID_REQUEUE); + } + break; } + if (!do_work) return; -- 1.7.4.1