#include <sys/select.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include "pager.h"
#include "run-command.h"
#include "sigchain.h"
#include "subcmd-config.h"

/*
 * This is split up from the rest of git so that we can do
 * something different on Windows.
 */

static int spawned_pager;
static int pager_columns;

void pager_init(const char *pager_env)
{
	subcmd_config.pager_env = pager_env;
}

static void pager_preexec(void)
{
	/*
	 * Work around bug in "less" by not starting it until we
	 * have real input
	 */
	fd_set in;

	FD_ZERO(&in);
	FD_SET(0, &in);
	select(1, &in, NULL, &in, NULL);

	setenv("LESS", "FRSX", 0);
}

static const char *pager_argv[] = { "sh", "-c", NULL, NULL };
static struct child_process pager_process;

static void wait_for_pager(void)
{
	fflush(stdout);
	fflush(stderr);
	/* signal EOF to pager */
	close(1);
	close(2);
	finish_command(&pager_process);
}

static void wait_for_pager_signal(int signo)
{
	wait_for_pager();
	sigchain_pop(signo);
	raise(signo);
}

void setup_pager(void)
{
	const char *pager = getenv(subcmd_config.pager_env);
	struct winsize sz;

	if (!isatty(1))
		return;
	if (ioctl(1, TIOCGWINSZ, &sz) == 0)
		pager_columns = sz.ws_col;
	if (!pager)
		pager = getenv("PAGER");
	if (!(pager || access("/usr/bin/pager", X_OK)))
		pager = "/usr/bin/pager";
	if (!(pager || access("/usr/bin/less", X_OK)))
		pager = "/usr/bin/less";
	if (!pager)
		pager = "cat";
	if (!*pager || !strcmp(pager, "cat"))
		return;

	spawned_pager = 1; /* means we are emitting to terminal */

	/* spawn the pager */
	pager_argv[2] = pager;
	pager_process.argv = pager_argv;
	pager_process.in = -1;
	pager_process.preexec_cb = pager_preexec;

	if (start_command(&pager_process))
		return;

	/* original process continues, but writes to the pipe */
	dup2(pager_process.in, 1);
	if (isatty(2))
		dup2(pager_process.in, 2);
	close(pager_process.in);

	/* this makes sure that the parent terminates after the pager */
	sigchain_push_common(wait_for_pager_signal);
	atexit(wait_for_pager);
}

int pager_in_use(void)
{
	return spawned_pager;
}

int pager_get_columns(void)
{
	char *s;

	s = getenv("COLUMNS");
	if (s)
		return atoi(s);

	return (pager_columns ? pager_columns : 80) - 2;
}
thod='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/misc'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='4bd888a80b1d48dbd83f1cbf806e923a30051958'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=4bd888a80b1d48dbd83f1cbf806e923a30051958'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers?h=nds-private-remove&amp;id=4bd888a80b1d48dbd83f1cbf806e923a30051958'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb?h=nds-private-remove&amp;id=4bd888a80b1d48dbd83f1cbf806e923a30051958'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/misc?h=nds-private-remove&amp;id=4bd888a80b1d48dbd83f1cbf806e923a30051958'>misc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/misc?h=nds-private-remove&amp;id=4bd888a80b1d48dbd83f1cbf806e923a30051958&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
t:</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>Tony Lindgren &lt;tony@atomide.com&gt;</td><td class='right'>2017-01-24 09:18:57 -0600</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-25 11:02:29 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/ktest?h=nds-private-remove&amp;id=407788b51db6f6aab499d02420082f436abf3238'>407788b51db6f6aab499d02420082f436abf3238</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing/ktest?id=407788b51db6f6aab499d02420082f436abf3238'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=407788b51db6f6aab499d02420082f436abf3238'>b2fb3c885baf47cd2bd8ee0429f423b352e11905</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing/ktest?h=nds-private-remove&amp;id=407788b51db6f6aab499d02420082f436abf3238'>tools/testing/ktest</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/ktest?h=nds-private-remove&amp;id=7a308bb3016f57e5be11a677d15b821536419d36'>7a308bb3016f57e5be11a677d15b821536419d36</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing/ktest?h=nds-private-remove&amp;id=407788b51db6f6aab499d02420082f436abf3238&amp;id2=7a308bb3016f57e5be11a677d15b821536419d36'>diff</a>)</td></tr></table>
<div class='commit-subject'>usb: musb: Fix host mode error -71 regression</div><div class='commit-msg'>Commit 467d5c980709 ("usb: musb: Implement session bit based runtime PM for
musb-core") started implementing musb generic runtime PM support by
introducing devctl register session bit based state control.

This caused a regression where if a USB mass storage device is connected
to a USB hub, we can get:

usb 1-1: reset high-speed USB device number 2 using musb-hdrc
usb 1-1: device descriptor read/64, error -71
usb 1-1.1: new high-speed USB device number 4 using musb-hdrc

This is because before the USB storage device is connected, musb is
in OTG_STATE_A_SUSPEND. And we currently only set need_finish_resume
in musb_stage0_irq() and the related code calling finish_resume_work
in musb_resume() and musb_runtime_resume() never gets called.

To fix the issue, we can call schedule_delayed_work() directly in
musb_stage0_irq() to have finish_resume_work run.

And we should no longer never get interrupts when when suspended.
We have changed musb to no longer need pm_runtime_irqsafe().
The need_finish_resume flag was added in commit 9298b4aad37e ("usb:
musb: fix device hotplug behind hub") and no longer applies as far
as I can tell. So let's just remove the earlier code that no longer
is needed.

Fixes: 467d5c980709 ("usb: musb: Implement session bit based runtime PM for musb-core")
Reported-by: Bin Liu &lt;b-liu@ti.com&gt;
Signed-off-by: Tony Lindgren &lt;tony@atomide.com&gt;
Signed-off-by: Bin Liu &lt;b-liu@ti.com&gt;
Cc: stable &lt;stable@vger.kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=407788b51db6f6aab499d02420082f436abf3238'>Diffstat</a> (limited to 'tools/testing/ktest')</div><table summary='diffstat' class='diffstat'>