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Message-Id: <1309358377-8537-34-git-send-email-kys@microsoft.com>
Date: Wed, 29 Jun 2011 07:39:31 -0700
From: "K. Y. Srinivasan" <kys@...rosoft.com>
To: gregkh@...e.de, linux-kernel@...r.kernel.org,
devel@...uxdriverproject.org, virtualization@...ts.osdl.org
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Abhishek Kane <v-abkane@...rosoft.com>,
Hank Janssen <hjanssen@...rosoft.com>
Subject: [PATCH 34/40] Staging: hv: storvsc: Add the contents of hyperv_storage.h to storvsc_drv.c
Add the contents of hyperv_storage.h to storvsc_drv.c and cleanup storvsc_drv.c.n
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: Abhishek Kane <v-abkane@...rosoft.com>
Signed-off-by: Hank Janssen <hjanssen@...rosoft.com>
---
drivers/staging/hv/hyperv_storage.h | 355 -----------------------------------
drivers/staging/hv/storvsc_drv.c | 314 ++++++++++++++++++++++++++++++-
2 files changed, 313 insertions(+), 356 deletions(-)
delete mode 100644 drivers/staging/hv/hyperv_storage.h
diff --git a/drivers/staging/hv/hyperv_storage.h b/drivers/staging/hv/hyperv_storage.h
deleted file mode 100644
index 865ede1..0000000
--- a/drivers/staging/hv/hyperv_storage.h
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- *
- * Copyright (c) 2011, Microsoft Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Authors:
- * Haiyang Zhang <haiyangz@...rosoft.com>
- * Hank Janssen <hjanssen@...rosoft.com>
- * K. Y. Srinivasan <kys@...rosoft.com>
- *
- */
-
-#ifndef _HYPERV_STORAGE_H
-#define _HYPERV_STORAGE_H
-
-/*
- * We want to manage the IDE devices using standard Linux SCSI drivers
- * using the storvsc driver.
- * Define special channels to support this.
- */
-
-#define HV_MAX_IDE_DEVICES 4
-#define HV_IDE_BASE_CHANNEL 10
-#define HV_IDE0_DEV1 HV_IDE_BASE_CHANNEL
-#define HV_IDE0_DEV2 (HV_IDE_BASE_CHANNEL + 1)
-#define HV_IDE1_DEV1 (HV_IDE_BASE_CHANNEL + 2)
-#define HV_IDE1_DEV2 (HV_IDE_BASE_CHANNEL + 3)
-
-
-/* vstorage.w revision number. This is used in the case of a version match, */
-/* to alert the user that structure sizes may be mismatched even though the */
-/* protocol versions match. */
-
-
-#define REVISION_STRING(REVISION_) #REVISION_
-#define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \
- do { \
- char *revision_string \
- = REVISION_STRING($Rev : 6 $) + 6; \
- RESULT_LVALUE_ = 0; \
- while (*revision_string >= '0' \
- && *revision_string <= '9') { \
- RESULT_LVALUE_ *= 10; \
- RESULT_LVALUE_ += *revision_string - '0'; \
- revision_string++; \
- } \
- } while (0)
-
-/* Major/minor macros. Minor version is in LSB, meaning that earlier flat */
-/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
-#define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
-#define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff)
-#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
- (((MINOR_) & 0xff)))
-#define VMSTOR_INVALID_PROTOCOL_VERSION (-1)
-
-/* Version history: */
-/* V1 Beta 0.1 */
-/* V1 RC < 2008/1/31 1.0 */
-/* V1 RC > 2008/1/31 2.0 */
-#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
-
-
-
-
-/* This will get replaced with the max transfer length that is possible on */
-/* the host adapter. */
-/* The max transfer length will be published when we offer a vmbus channel. */
-#define MAX_TRANSFER_LENGTH 0x40000
-#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \
- sizeof(struct vstor_packet) + \
- sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
-
-
-/* Packet structure describing virtual storage requests. */
-enum vstor_packet_operation {
- VSTOR_OPERATION_COMPLETE_IO = 1,
- VSTOR_OPERATION_REMOVE_DEVICE = 2,
- VSTOR_OPERATION_EXECUTE_SRB = 3,
- VSTOR_OPERATION_RESET_LUN = 4,
- VSTOR_OPERATION_RESET_ADAPTER = 5,
- VSTOR_OPERATION_RESET_BUS = 6,
- VSTOR_OPERATION_BEGIN_INITIALIZATION = 7,
- VSTOR_OPERATION_END_INITIALIZATION = 8,
- VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
- VSTOR_OPERATION_QUERY_PROPERTIES = 10,
- VSTOR_OPERATION_MAXIMUM = 10
-};
-
-/*
- * Platform neutral description of a scsi request -
- * this remains the same across the write regardless of 32/64 bit
- * note: it's patterned off the SCSI_PASS_THROUGH structure
- */
-#define CDB16GENERIC_LENGTH 0x10
-
-#ifndef SENSE_BUFFER_SIZE
-#define SENSE_BUFFER_SIZE 0x12
-#endif
-
-#define MAX_DATA_BUF_LEN_WITH_PADDING 0x14
-
-struct vmscsi_request {
- unsigned short length;
- unsigned char srb_status;
- unsigned char scsi_status;
-
- unsigned char port_number;
- unsigned char path_id;
- unsigned char target_id;
- unsigned char lun;
-
- unsigned char cdb_length;
- unsigned char sense_info_length;
- unsigned char data_in;
- unsigned char reserved;
-
- unsigned int data_transfer_length;
-
- union {
- unsigned char cdb[CDB16GENERIC_LENGTH];
- unsigned char sense_data[SENSE_BUFFER_SIZE];
- unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING];
- };
-} __attribute((packed));
-
-
-/*
- * This structure is sent during the intialization phase to get the different
- * properties of the channel.
- */
-struct vmstorage_channel_properties {
- unsigned short protocol_version;
- unsigned char path_id;
- unsigned char target_id;
-
- /* Note: port number is only really known on the client side */
- unsigned int port_number;
- unsigned int flags;
- unsigned int max_transfer_bytes;
-
- /* This id is unique for each channel and will correspond with */
- /* vendor specific data in the inquirydata */
- unsigned long long unique_id;
-} __packed;
-
-/* This structure is sent during the storage protocol negotiations. */
-struct vmstorage_protocol_version {
- /* Major (MSW) and minor (LSW) version numbers. */
- unsigned short major_minor;
-
- /*
- * Revision number is auto-incremented whenever this file is changed
- * (See FILL_VMSTOR_REVISION macro above). Mismatch does not
- * definitely indicate incompatibility--but it does indicate mismatched
- * builds.
- */
- unsigned short revision;
-} __packed;
-
-/* Channel Property Flags */
-#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
-#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
-
-struct vstor_packet {
- /* Requested operation type */
- enum vstor_packet_operation operation;
-
- /* Flags - see below for values */
- unsigned int flags;
-
- /* Status of the request returned from the server side. */
- unsigned int status;
-
- /* Data payload area */
- union {
- /*
- * Structure used to forward SCSI commands from the
- * client to the server.
- */
- struct vmscsi_request vm_srb;
-
- /* Structure used to query channel properties. */
- struct vmstorage_channel_properties storage_channel_properties;
-
- /* Used during version negotiations. */
- struct vmstorage_protocol_version version;
- };
-} __packed;
-
-/* Packet flags */
-/*
- * This flag indicates that the server should send back a completion for this
- * packet.
- */
-#define REQUEST_COMPLETION_FLAG 0x1
-
-/* This is the set of flags that the vsc can set in any packets it sends */
-#define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG)
-
-
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include "hyperv_storage.h"
-#include "hyperv.h"
-
-/* Defines */
-#define STORVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
-#define BLKVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
-
-#define STORVSC_MAX_IO_REQUESTS 128
-
-/*
- * In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
- * reality, the path/target is not used (ie always set to 0) so our
- * scsi host adapter essentially has 1 bus with 1 target that contains
- * up to 256 luns.
- */
-#define STORVSC_MAX_LUNS_PER_TARGET 64
-#define STORVSC_MAX_TARGETS 1
-#define STORVSC_MAX_CHANNELS 1
-
-struct hv_storvsc_request;
-
-/* Matches Windows-end */
-enum storvsc_request_type {
- WRITE_TYPE,
- READ_TYPE,
- UNKNOWN_TYPE,
-};
-
-
-struct hv_storvsc_request {
- struct hv_storvsc_request *request;
- struct hv_device *device;
-
- /* Synchronize the request/response if needed */
- struct completion wait_event;
-
- unsigned char *sense_buffer;
- void *context;
- void (*on_io_completion)(struct hv_storvsc_request *request);
- struct hv_multipage_buffer data_buffer;
-
- struct vstor_packet vstor_packet;
-};
-
-
-struct storvsc_device_info {
- u32 ring_buffer_size;
- unsigned int port_number;
- unsigned char path_id;
- unsigned char target_id;
-};
-
-struct storvsc_major_info {
- int major;
- int index;
- bool do_register;
- char *devname;
- char *diskname;
-};
-
-/* A storvsc device is a device object that contains a vmbus channel */
-struct storvsc_device {
- struct hv_device *device;
-
- /* 0 indicates the device is being destroyed */
- int ref_count;
- bool destroy;
- bool drain_notify;
- bool hba_owner;
- atomic_t num_outstanding_req;
-
- wait_queue_head_t waiting_to_drain;
-
- /*
- * Each unique Port/Path/Target represents 1 channel ie scsi
- * controller. In reality, the pathid, targetid is always 0
- * and the port is set by us
- */
- unsigned int port_number;
- unsigned char path_id;
- unsigned char target_id;
-
- /* Used for vsc/vsp channel reset process */
- struct hv_storvsc_request init_request;
- struct hv_storvsc_request reset_request;
-};
-
-
-static inline struct storvsc_device *get_out_stor_device(
- struct hv_device *device)
-{
- struct storvsc_device *stor_device;
- unsigned long flags;
-
- spin_lock_irqsave(&device->ext_lock, flags);
- stor_device = (struct storvsc_device *)device->ext;
- if (stor_device && (stor_device->ref_count) &&
- !stor_device->destroy)
- stor_device->ref_count++;
- else
- stor_device = NULL;
- spin_unlock_irqrestore(&device->ext_lock, flags);
-
- return stor_device;
-}
-
-
-static inline void put_stor_device(struct hv_device *device)
-{
- struct storvsc_device *stor_device;
- unsigned long flags;
-
- spin_lock_irqsave(&device->ext_lock, flags);
- stor_device = (struct storvsc_device *)device->ext;
-
- stor_device->ref_count--;
- spin_unlock_irqrestore(&device->ext_lock, flags);
-}
-
-static inline void storvsc_wait_to_drain(struct storvsc_device *dev)
-{
- dev->drain_notify = true;
- wait_event(dev->waiting_to_drain,
- atomic_read(&dev->num_outstanding_req) == 0);
- dev->drain_notify = false;
-}
-
-/* Interface */
-
-int storvsc_dev_add(struct hv_device *device,
- void *additional_info);
-int storvsc_dev_remove(struct hv_device *device);
-
-int storvsc_do_io(struct hv_device *device,
- struct hv_storvsc_request *request);
-
-int storvsc_get_major_info(struct storvsc_device_info *device_info,
- struct storvsc_major_info *major_info);
-
-#endif /* _HYPERV_STORAGE_H */
diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index 0702dc0..f54f013 100644
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -21,6 +21,7 @@
*/
#include <linux/kernel.h>
+#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/string.h>
@@ -41,7 +42,318 @@
#include <scsi/scsi_dbg.h>
#include "hyperv.h"
-#include "hyperv_storage.h"
+
+
+/*
+ * We want to manage the IDE devices using standard Linux SCSI drivers
+ * using the storvsc driver.
+ * Define special channels to support this.
+ */
+
+#define HV_MAX_IDE_DEVICES 4
+#define HV_IDE_BASE_CHANNEL 10
+#define HV_IDE0_DEV1 HV_IDE_BASE_CHANNEL
+#define HV_IDE0_DEV2 (HV_IDE_BASE_CHANNEL + 1)
+#define HV_IDE1_DEV1 (HV_IDE_BASE_CHANNEL + 2)
+#define HV_IDE1_DEV2 (HV_IDE_BASE_CHANNEL + 3)
+
+
+/* vstorage.w revision number. This is used in the case of a version match, */
+/* to alert the user that structure sizes may be mismatched even though the */
+/* protocol versions match. */
+
+
+#define REVISION_STRING(REVISION_) #REVISION_
+#define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \
+ do { \
+ char *revision_string \
+ = REVISION_STRING($Rev : 6 $) + 6; \
+ RESULT_LVALUE_ = 0; \
+ while (*revision_string >= '0' \
+ && *revision_string <= '9') { \
+ RESULT_LVALUE_ *= 10; \
+ RESULT_LVALUE_ += *revision_string - '0'; \
+ revision_string++; \
+ } \
+ } while (0)
+
+/* Major/minor macros. Minor version is in LSB, meaning that earlier flat */
+/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
+#define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
+#define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff)
+#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
+ (((MINOR_) & 0xff)))
+#define VMSTOR_INVALID_PROTOCOL_VERSION (-1)
+
+/* Version history: */
+/* V1 Beta 0.1 */
+/* V1 RC < 2008/1/31 1.0 */
+/* V1 RC > 2008/1/31 2.0 */
+#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
+
+
+
+
+/* This will get replaced with the max transfer length that is possible on */
+/* the host adapter. */
+/* The max transfer length will be published when we offer a vmbus channel. */
+#define MAX_TRANSFER_LENGTH 0x40000
+#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \
+ sizeof(struct vstor_packet) + \
+ sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
+
+
+/* Packet structure describing virtual storage requests. */
+enum vstor_packet_operation {
+ VSTOR_OPERATION_COMPLETE_IO = 1,
+ VSTOR_OPERATION_REMOVE_DEVICE = 2,
+ VSTOR_OPERATION_EXECUTE_SRB = 3,
+ VSTOR_OPERATION_RESET_LUN = 4,
+ VSTOR_OPERATION_RESET_ADAPTER = 5,
+ VSTOR_OPERATION_RESET_BUS = 6,
+ VSTOR_OPERATION_BEGIN_INITIALIZATION = 7,
+ VSTOR_OPERATION_END_INITIALIZATION = 8,
+ VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
+ VSTOR_OPERATION_QUERY_PROPERTIES = 10,
+ VSTOR_OPERATION_MAXIMUM = 10
+};
+
+/*
+ * Platform neutral description of a scsi request -
+ * this remains the same across the write regardless of 32/64 bit
+ * note: it's patterned off the SCSI_PASS_THROUGH structure
+ */
+#define CDB16GENERIC_LENGTH 0x10
+
+#ifndef SENSE_BUFFER_SIZE
+#define SENSE_BUFFER_SIZE 0x12
+#endif
+
+#define MAX_DATA_BUF_LEN_WITH_PADDING 0x14
+
+struct vmscsi_request {
+ unsigned short length;
+ unsigned char srb_status;
+ unsigned char scsi_status;
+
+ unsigned char port_number;
+ unsigned char path_id;
+ unsigned char target_id;
+ unsigned char lun;
+
+ unsigned char cdb_length;
+ unsigned char sense_info_length;
+ unsigned char data_in;
+ unsigned char reserved;
+
+ unsigned int data_transfer_length;
+
+ union {
+ unsigned char cdb[CDB16GENERIC_LENGTH];
+ unsigned char sense_data[SENSE_BUFFER_SIZE];
+ unsigned char reserved_array[MAX_DATA_BUF_LEN_WITH_PADDING];
+ };
+} __attribute((packed));
+
+
+/*
+ * This structure is sent during the intialization phase to get the different
+ * properties of the channel.
+ */
+struct vmstorage_channel_properties {
+ unsigned short protocol_version;
+ unsigned char path_id;
+ unsigned char target_id;
+
+ /* Note: port number is only really known on the client side */
+ unsigned int port_number;
+ unsigned int flags;
+ unsigned int max_transfer_bytes;
+
+ /* This id is unique for each channel and will correspond with */
+ /* vendor specific data in the inquirydata */
+ unsigned long long unique_id;
+} __packed;
+
+/* This structure is sent during the storage protocol negotiations. */
+struct vmstorage_protocol_version {
+ /* Major (MSW) and minor (LSW) version numbers. */
+ unsigned short major_minor;
+
+ /*
+ * Revision number is auto-incremented whenever this file is changed
+ * (See FILL_VMSTOR_REVISION macro above). Mismatch does not
+ * definitely indicate incompatibility--but it does indicate mismatched
+ * builds.
+ */
+ unsigned short revision;
+} __packed;
+
+/* Channel Property Flags */
+#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
+#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
+
+struct vstor_packet {
+ /* Requested operation type */
+ enum vstor_packet_operation operation;
+
+ /* Flags - see below for values */
+ unsigned int flags;
+
+ /* Status of the request returned from the server side. */
+ unsigned int status;
+
+ /* Data payload area */
+ union {
+ /*
+ * Structure used to forward SCSI commands from the
+ * client to the server.
+ */
+ struct vmscsi_request vm_srb;
+
+ /* Structure used to query channel properties. */
+ struct vmstorage_channel_properties storage_channel_properties;
+
+ /* Used during version negotiations. */
+ struct vmstorage_protocol_version version;
+ };
+} __packed;
+
+/* Packet flags */
+/*
+ * This flag indicates that the server should send back a completion for this
+ * packet.
+ */
+#define REQUEST_COMPLETION_FLAG 0x1
+
+/* This is the set of flags that the vsc can set in any packets it sends */
+#define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG)
+
+
+/* Defines */
+#define STORVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
+#define BLKVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
+
+#define STORVSC_MAX_IO_REQUESTS 128
+
+/*
+ * In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
+ * reality, the path/target is not used (ie always set to 0) so our
+ * scsi host adapter essentially has 1 bus with 1 target that contains
+ * up to 256 luns.
+ */
+#define STORVSC_MAX_LUNS_PER_TARGET 64
+#define STORVSC_MAX_TARGETS 1
+#define STORVSC_MAX_CHANNELS 1
+
+struct hv_storvsc_request;
+
+/* Matches Windows-end */
+enum storvsc_request_type {
+ WRITE_TYPE,
+ READ_TYPE,
+ UNKNOWN_TYPE,
+};
+
+
+struct hv_storvsc_request {
+ struct hv_storvsc_request *request;
+ struct hv_device *device;
+
+ /* Synchronize the request/response if needed */
+ struct completion wait_event;
+
+ unsigned char *sense_buffer;
+ void *context;
+ void (*on_io_completion)(struct hv_storvsc_request *request);
+ struct hv_multipage_buffer data_buffer;
+
+ struct vstor_packet vstor_packet;
+};
+
+
+struct storvsc_device_info {
+ u32 ring_buffer_size;
+ unsigned int port_number;
+ unsigned char path_id;
+ unsigned char target_id;
+};
+
+struct storvsc_major_info {
+ int major;
+ int index;
+ bool do_register;
+ char *devname;
+ char *diskname;
+};
+
+/* A storvsc device is a device object that contains a vmbus channel */
+struct storvsc_device {
+ struct hv_device *device;
+
+ /* 0 indicates the device is being destroyed */
+ int ref_count;
+ bool destroy;
+ bool drain_notify;
+ bool hba_owner;
+ atomic_t num_outstanding_req;
+
+ wait_queue_head_t waiting_to_drain;
+
+ /*
+ * Each unique Port/Path/Target represents 1 channel ie scsi
+ * controller. In reality, the pathid, targetid is always 0
+ * and the port is set by us
+ */
+ unsigned int port_number;
+ unsigned char path_id;
+ unsigned char target_id;
+
+ /* Used for vsc/vsp channel reset process */
+ struct hv_storvsc_request init_request;
+ struct hv_storvsc_request reset_request;
+};
+
+
+static inline struct storvsc_device *get_out_stor_device(
+ struct hv_device *device)
+{
+ struct storvsc_device *stor_device;
+ unsigned long flags;
+
+ spin_lock_irqsave(&device->ext_lock, flags);
+ stor_device = (struct storvsc_device *)device->ext;
+ if (stor_device && (stor_device->ref_count) &&
+ !stor_device->destroy)
+ stor_device->ref_count++;
+ else
+ stor_device = NULL;
+ spin_unlock_irqrestore(&device->ext_lock, flags);
+
+ return stor_device;
+}
+
+
+static inline void put_stor_device(struct hv_device *device)
+{
+ struct storvsc_device *stor_device;
+ unsigned long flags;
+
+ spin_lock_irqsave(&device->ext_lock, flags);
+ stor_device = (struct storvsc_device *)device->ext;
+
+ stor_device->ref_count--;
+ spin_unlock_irqrestore(&device->ext_lock, flags);
+}
+
+static inline void storvsc_wait_to_drain(struct storvsc_device *dev)
+{
+ dev->drain_notify = true;
+ wait_event(dev->waiting_to_drain,
+ atomic_read(&dev->num_outstanding_req) == 0);
+ dev->drain_notify = false;
+}
+
static int storvsc_ringbuffer_size = STORVSC_RING_BUFFER_SIZE;
--
1.7.4.1
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