[PATCH v2] sparc64: sunvdc: Complete I/O request if vdisk server error

[chris hyser <chris.hyser@oracle.com>]

Hi Dave,

Sending it again. Thanks.

-chrish

-------- Forwarded Message --------
Subject: [PATCH v2] sparc64: sunvdc: Complete I/O request if vdisk server error
Date: Fri, 21 Nov 2014 16:06:30 -0500
From: chris hyser <chris.hyser@oracle.com>
To: sparclinux@vger.kernel.org

Sorry for the confusion of the prior message. Below was the intended commit message.

-chrish

sparc64: sunvdc: Complete I/O request if vdisk server error

If virtual disk server returns an I/O with an error and 0 data transferred,
complete the I/O with EIO to ensure initiating process does not hang
indefinitely.

Signed-off-by: Chris Hyser <chris.hyser@oracle.com>

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 0ebadf9..17e9a50 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -279,7 +279,12 @@ static void vdc_end_one(struct vdc_port *port, struct vio_dring_state *dr,

  	rqe->req = NULL;

-	__blk_end_request(req, (desc->status ? -EIO : 0), desc->size);
+	if (desc->status && desc->size = 0) {
+		printk(KERN_ERR PFX "virtual disk server I/O error %d\n",
+				desc->status);
+		__blk_end_request_all(req, -EIO);
+	} else
+		__blk_end_request(req, (desc->status ? -EIO : 0) , desc->size);

  	/* restart blk queue when ring is half emptied */
  	if (blk_queue_stopped(port->disk->queue) &&