From 9c07ce2f1e4468aa013a52bd9b788b3b1f8cbff3 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Wed, 27 Aug 2014 16:25:31 -0700 Subject: [PATCH] Drivers: hv: vmbus: Cleanup vmbus_post_msg() commit fdeebcc62279119dbeafbc1a2e39e773839025fd upstream. Posting messages to the host can fail because of transient resource related failures. Correctly deal with these failures and increase the number of attempts to post the message before giving up. In this version of the patch, I have normalized the error code to Linux error code. Signed-off-by: K. Y. Srinivasan Tested-by: Sitsofe Wheeler Signed-off-by: Jiri Slaby --- drivers/hv/connection.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 59ef4e7afdd72..30688f6a01610 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -409,10 +409,21 @@ int vmbus_post_msg(void *buffer, size_t buflen) * insufficient resources. Retry the operation a couple of * times before giving up. */ - while (retries < 3) { - ret = hv_post_message(conn_id, 1, buffer, buflen); - if (ret != HV_STATUS_INSUFFICIENT_BUFFERS) + while (retries < 10) { + ret = hv_post_message(conn_id, 1, buffer, buflen); + + switch (ret) { + case HV_STATUS_INSUFFICIENT_BUFFERS: + ret = -ENOMEM; + case -ENOMEM: + break; + case HV_STATUS_SUCCESS: return ret; + default: + pr_err("hv_post_msg() failed; error code:%d\n", ret); + return -EINVAL; + } + retries++; msleep(100); } -- 2.47.3