From: K. Y. Srinivasan <kys@microsoft.com>
Date: Thu, 18 May 2017 17:46:05 +0000 (-0700)
Subject: drivers: hv: vmbus: Increase the time between retries in vmbus_post_msg()
X-Git-Tag: v5.15~11006^2~125
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e917a5e23a87e24931625c344daea834cd2d6f2f;p=platform%2Fkernel%2Flinux-starfive.git

drivers: hv: vmbus: Increase the time between retries in vmbus_post_msg()

Commit c0bb03924f1a ("Drivers: hv: vmbus: Raise retry/wait limits in
vmbus_post_msg()") increased the retry/wait limits of vmbus_post_msg()
to address the new DoS protection policies in WS2016.
Increase the time between retries to make the
code more robust.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index c2d74ee..59c11ff 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -390,7 +390,7 @@ int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep)
 		else
 			mdelay(usec / 1000);
 
-		if (usec < 256000)
+		if (retries < 22)
 			usec *= 2;
 	}
 	return ret;