tree adbf26a13d0d50bce4d51196de838260fc3f4b6b
parent 18dc1281fe5af83c1dbb9c8895d7af824d2c1856
author Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com> 1504021321 +0530
committer Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com> 1504364024 +0530

Seek to file offset 0 after reading error file

For a fd watching for data in sysfs file, a poll would return
immediately after read unless file is closed and re-opened OR
stream is seeked to 0. This commit chooses latter.

From stackoverflow:

Once poll/select indicates that the value has changed, you need to close and
re-open the file, or seek to 0 and read again.

Also, use EPOLLPRI | EPOLLERR than EPOLLIN as needed by sysfs_inotify

Change-Id: I243cdfd9a09c567eac5e52abd9980ebf90b94f89
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>