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authorK. Y. Srinivasan <kys@microsoft.com>2014-08-27 16:25:31 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-09-23 23:30:38 -0700
commitfdeebcc62279119dbeafbc1a2e39e773839025fd (patch)
tree73332aa1af3d3c3a988a9bda73541c9361e424ac /drivers/hv
parent06c88b0d7ad87540405aea7f91d98ef43be04c95 (diff)
downloadop-kernel-dev-fdeebcc62279119dbeafbc1a2e39e773839025fd.zip
op-kernel-dev-fdeebcc62279119dbeafbc1a2e39e773839025fd.tar.gz
Drivers: hv: vmbus: Cleanup vmbus_post_msg()
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 <kys@microsoft.com> Cc: <stable@vger.kernel.org> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/connection.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index ae22e3c..e206619 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -427,10 +427,21 @@ 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);
}
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