| From 26989b5e7c85ac1d5715a5ef2667335061920e96 Mon Sep 17 00:00:00 2001 |
| From: Lei YU <mine260309@gmail.com> |
| Date: Thu, 23 Nov 2017 16:14:51 +0800 |
| Subject: [PATCH] sysfs: Return -ETIMEDOUT instead of throw exception |
| |
| Aspeed fan tach gives ETIMEDOUT error when host is powered off, it |
| causes phosphor-hwmon exit with read failure exception. |
| Make it return -ETIMEDOUT so that it gives negative value for fan speed |
| as workaround. |
| |
| Signed-off-by: Lei YU <mine260309@gmail.com> |
| --- |
| sysfs.cpp | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| diff --git a/sysfs.cpp b/sysfs.cpp |
| index 369d2e7..f390de6 100644 |
| --- a/sysfs.cpp |
| +++ b/sysfs.cpp |
| @@ -308,6 +308,12 @@ uint32_t HwmonIO::read( |
| throw std::system_error(rc, std::generic_category()); |
| } |
| |
| + if (rc == ETIMEDOUT) |
| + { |
| + // Workaround for AST fan tach driver |
| + // that returns -ETIMEDOUT when fan is not runnings |
| + return -rc; |
| + } |
| --retries; |
| std::this_thread::sleep_for(delay); |
| continue; |
| -- |
| 1.9.1 |
| |