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When write(2) on eventfd object fails with the error EAGAIN do not return

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the number of bytes written.

MFC after:	1 week
This commit is contained in:
Dmitry Chagin 2016-03-26 19:16:53 +00:00
parent 2bb14e7541
commit 09806d8e3e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=297297
1 changed files with 2 additions and 0 deletions
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sys/compat/linux/linux_event.c
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@ -751,6 +751,8 @@ eventfd_write(struct file *fp, struct uio *uio, struct ucred *active_cred,
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,