Author: dchagin
Date: Sat Mar 26 19:16:53 2016
New Revision: 297297
URL: https://svnweb.freebsd.org/changeset/base/297297
Log:
When write(2) on eventfd object fails with the error EAGAIN do not return
the number of bytes written.
MFC after: 1 week
Modified:
head/sys/compat/linux/linux_event.c
Modified: head/sys/compat/linux/linux_event.c
==============================================================================
--- head/sys/compat/linux/linux_event.c Sat Mar 26 19:15:23 2016
(r297296)
+++ head/sys/compat/linux/linux_event.c Sat Mar 26 19:16:53 2016
(r297297)
@@ -751,6 +751,8 @@ retry:
if (UINT64_MAX - efd->efd_count <= count) {
if ((efd->efd_flags & LINUX_O_NONBLOCK) != 0) {
mtx_unlock(&efd->efd_lock);
+ /* Do not not return the number of bytes written */
+ uio->uio_resid += sizeof(eventfd_t);
return (EAGAIN);
}
error = mtx_sleep(&efd->efd_count, &efd->efd_lock,
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