From 22b52db4842611ac31a356f023fc09595384e2ad Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Thu, 23 May 2019 18:11:22 -0700
Subject: [PATCH] mbim: add an optional TEMP_FAILURE_RETRY macro copy

Fixes build on musl which does not provide this macro

Upstream-Status: Submitted [https://lists.ofono.org/pipermail/ofono/2019-May/019370.html]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 drivers/mbimmodem/mbim-private.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mbimmodem/mbim-private.h b/drivers/mbimmodem/mbim-private.h
index e159235..51693ea 100644
--- a/drivers/mbimmodem/mbim-private.h
+++ b/drivers/mbimmodem/mbim-private.h
@@ -21,6 +21,15 @@
 
 #define align_len(len, boundary) (((len)+(boundary)-1) & ~((boundary)-1))
 
+#ifndef TEMP_FAILURE_RETRY
+#define TEMP_FAILURE_RETRY(expression) ({     \
+  __typeof(expression) __result;              \
+  do {                                        \
+    __result = (expression);                  \
+  } while (__result == -1 && errno == EINTR); \
+  __result; })
+#endif
+
 enum mbim_control_message {
 	MBIM_OPEN_MSG = 0x1,
 	MBIM_CLOSE_MSG = 0x2,
-- 
2.21.0