/*
 * Copyright 2016, Cyril Bur, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Sending one self a signal should always get delivered.
 */

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <altivec.h>

#include "utils.h"

#define MAX_ATTEMPT 500000
#define TIMEOUT 5

extern long signal_self(pid_t pid, int sig);

static sig_atomic_t signaled;
static sig_atomic_t fail;

static void signal_handler(int sig)
{
	if (sig == SIGUSR1)
		signaled = 1;
	else
		fail = 1;
}

static int test_signal()
{
	int i;
	struct sigaction act;
	pid_t ppid = getpid();
	pid_t pid;

	act.sa_handler = signal_handler;
	act.sa_flags = 0;
	sigemptyset(&act.sa_mask);
	if (sigaction(SIGUSR1, &act, NULL) < 0) {
		perror("sigaction SIGUSR1");
		exit(1);
	}
	if (sigaction(SIGALRM, &act, NULL) < 0) {
		perror("sigaction SIGALRM");
		exit(1);
	}

	/* Don't do this for MAX_ATTEMPT, its simply too long */
	for(i  = 0; i < 1000; i++) {
		pid = fork();
		if (pid == -1) {
			perror("fork");
			exit(1);
		}
		if (pid == 0) {
			signal_self(ppid, SIGUSR1);
			exit(1);
		} else {
			alarm(0); /* Disable any pending */
			alarm(2);
			while (!signaled && !fail)
				asm volatile("": : :"memory");
			if (!signaled) {
				fprintf(stderr, "Didn't get signal from child\n");
				FAIL_IF(1); /* For the line number */
			}
			/* Otherwise we'll loop too fast and fork() will eventually fail */
			waitpid(pid, NULL, 0);
		}
	}

	for (i = 0; i < MAX_ATTEMPT; i++) {
		long rc;

		alarm(0); /* Disable any pending */
		signaled = 0;
		alarm(TIMEOUT);
		rc = signal_self(ppid, SIGUSR1);
		if (rc) {
			fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
					i, fail, rc);
			FAIL_IF(1); /* For the line number */
		}
		while (!signaled && !fail)
			asm volatile("": : :"memory");
		if (!signaled) {
			fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
					i, fail, rc);
			FAIL_IF(1); /* For the line number */
		}
	}

	return 0;
}

int main(void)
{
	test_harness_set_timeout(300);
	return test_harness(test_signal, "signal");
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=889711a03e0fba427fb85317900e93c74e3be02a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=889711a03e0fba427fb85317900e93c74e3be02a'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=889711a03e0fba427fb85317900e93c74e3be02a'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget?id=889711a03e0fba427fb85317900e93c74e3be02a'>gadget</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/function?id=889711a03e0fba427fb85317900e93c74e3be02a'>function</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a'>f_hid.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='889711a03e0fba427fb85317900e93c74e3be02a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-01 12:46:17 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-01 12:46:17 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a'>889711a03e0fba427fb85317900e93c74e3be02a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=889711a03e0fba427fb85317900e93c74e3be02a'>05af2eda6502a95cf11935cce1e9b25a1340e7ca</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a'>drivers/usb/gadget/function/f_hid.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/function/f_hid.c?id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>ff1176f6164f3d151ee64c05d3f7b6662a81b982</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a&amp;id2=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/function/f_hid.c?id=7243a1af37a4dc9225004546d9d0756c529ad3ce'>7243a1af37a4dc9225004546d9d0756c529ad3ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/gadget/function/f_hid.c?id=889711a03e0fba427fb85317900e93c74e3be02a&amp;id2=7243a1af37a4dc9225004546d9d0756c529ad3ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'wireless-drivers-next-for-davem-2017-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next</div><div class='commit-msg'>Kalle Valo says:

====================
wireless-drivers-next patches for 4.11

It's nice to see rt2x00 development has becoming active, for example
adding support for a new chip version. Also wcn36xx has been converted
to use the recently merged QCOM_SMD subsystem. Otherwise new features
and fixes it lots of drivers.

Major changes:

iwlwifi

* some more work in preparation for A000 family support
* add support for radiotap timestamps
* some work on our firmware debugging capabilities

wcn36xx

* convert to a proper QCOM_SMD driver (from the platform_driver interface)

ath10k

* VHT160 support
* dump Copy Engine registers during firmware crash
* search board file extension from SMBIOS

wil6210

* add disable_ap_sme module parameter

rt2x00

* support RT3352 with external PA
* support for RT3352 with 20MHz crystal
* add support for RT5350 WiSoC

brcmfmac

* add support for BCM43455 sdio device

rtl8xxxu

* add support for D-Link DWA-131 rev E1, TP-Link TL-WN822N v4 and others
====================

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=889711a03e0fba427fb85317900e93c74e3be02a'>Diffstat</a> (limited to 'drivers/usb/gadget/function/f_hid.c')</div><table summary='diffstat' class='diffstat'>