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Return early from read if kpause is interrupted by a signal.

This commit is contained in:
nat 2017-07-02 05:59:27 +00:00
parent 6d52cc85b8
commit 1d8c132573
1 changed files with 7 additions and 3 deletions
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10
sys/dev/pad/pad.c
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@ -1,4 +1,4 @@
/* $NetBSD: pad.c,v 1.39 2017/07/01 23:31:19 nat Exp $ */
/* $NetBSD: pad.c,v 1.40 2017/07/02 05:59:27 nat Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.39 2017/07/01 23:31:19 nat Exp $");
__KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.40 2017/07/02 05:59:27 nat Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -488,8 +488,12 @@ pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred,
wait_ticks = (hz * sc->sc_remainder) / 1000000;
if (wait_ticks > 0) {
sc->sc_remainder -= wait_ticks * 1000000 / hz;
kpause("padwait", TRUE, wait_ticks,
err = kpause("padwait", TRUE, wait_ticks,
&sc->sc_lock);
if (err != EWOULDBLOCK) {
mutex_exit(&sc->sc_lock);
continue;
}
}
}