From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752565AbbCJC3a (ORCPT ); Mon, 9 Mar 2015 22:29:30 -0400 Received: from p3plsmtps2ded04.prod.phx3.secureserver.net ([208.109.80.198]:42495 "EHLO p3plsmtps2ded04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752286AbbCJC3S (ORCPT ); Mon, 9 Mar 2015 22:29:18 -0400 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, apw@canonical.com, vkuznets@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 1/3] scsi: storvsc: Retrieve information about the capability of the target Date: Mon, 9 Mar 2015 20:45:05 -0700 Message-Id: <1425959107-24199-1-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1425958941-23374-1-git-send-email-kys@microsoft.com> References: <1425958941-23374-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The storage protocol informs the guest of the I/O capabilities of the storage stack. Retrieve this information and use it in the guest. Signed-off-by: K. Y. Srinivasan Reviewed-by: Long Li --- drivers/scsi/storvsc_drv.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index be8f12e..5c13eec 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -377,6 +377,10 @@ struct storvsc_device { unsigned char path_id; unsigned char target_id; + /* + * Max I/O, the device can support. + */ + u32 max_transfer_bytes; /* Used for vsc/vsp channel reset process */ struct storvsc_cmd_request init_request; struct storvsc_cmd_request reset_request; @@ -974,6 +978,8 @@ static int storvsc_channel_init(struct hv_device *device) STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL) process_sub_channels = true; } + stor_device->max_transfer_bytes = + vstor_packet->storage_channel_properties.max_transfer_bytes; memset(vstor_packet, 0, sizeof(struct vstor_packet)); vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION; -- 1.7.4.1