linux-kernel - [PATCH 132/206] Staging: hv: Compute max_outstanding_req_per

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Message-Id: <1304978288-22999-132-git-send-email-kys@microsoft.com>
Date:	Mon,  9 May 2011 14:56:54 -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 132/206] Staging: hv: Compute max_outstanding_req_per_channel where it is needed

Compute max_outstanding_req_per_channel where it is needed.

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/storvsc_drv.c |   30 +++++++++++++++---------------
 1 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index 07db877..7d8b8f9 100644
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -90,20 +90,6 @@ static int storvsc_initialize(struct hv_driver *driver)
 	memcpy(&driver->dev_type, &gStorVscDeviceType,
 	       sizeof(struct hv_guid));
 
-
-	/*
-	 * Divide the ring buffer data size (which is 1 page less
-	 * than the ring buffer size since that page is reserved for
-	 * the ring buffer indices) by the max request size (which is
-	 * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
-	 */
-	stor_driver->max_outstanding_req_per_channel =
-		((stor_driver->ring_buffer_size - PAGE_SIZE) /
-		  ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
-			   sizeof(struct vstor_packet) + sizeof(u64),
-			   sizeof(u64)));
-
-
 	return 0;
 }
 
@@ -797,13 +783,27 @@ static int storvsc_drv_init(void)
 	int ret;
 	struct storvsc_driver *storvsc_drv_obj = &storvsc_drv;
 	struct hv_driver *drv = &storvsc_drv.base;
+	u32 max_outstanding_req_per_channel;
+
+	/*
+	 * Divide the ring buffer data size (which is 1 page less
+	 * than the ring buffer size since that page is reserved for
+	 * the ring buffer indices) by the max request size (which is
+	 * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
+	 */
+
+	max_outstanding_req_per_channel =
+	((storvsc_ringbuffer_size - PAGE_SIZE) /
+	ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
+	sizeof(struct vstor_packet) + sizeof(u64),
+	sizeof(u64)));
 
 	storvsc_drv_obj->ring_buffer_size = storvsc_ringbuffer_size;
 
 	/* Callback to client driver to complete the initialization */
 	storvsc_initialize(&storvsc_drv_obj->base);
 
-	if (storvsc_drv_obj->max_outstanding_req_per_channel <
+	if (max_outstanding_req_per_channel <
 	    STORVSC_MAX_IO_REQUESTS)
 		return -1;
 
-- 
1.7.4.1

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