/*
 * bdc_dbg.c - BRCM BDC USB3.0 device controller debug functions
 *
 * Copyright (C) 2014 Broadcom Corporation
 *
 * Author: Ashwini Pahuja
 *
 * 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.
 *
 */

#include "bdc.h"
#include "bdc_dbg.h"

void bdc_dbg_regs(struct bdc *bdc)
{
	u32 temp;

	dev_vdbg(bdc->dev, "bdc->regs:%p\n", bdc->regs);
	temp = bdc_readl(bdc->regs, BDC_BDCCFG0);
	dev_vdbg(bdc->dev, "bdccfg0:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_BDCCFG1);
	dev_vdbg(bdc->dev, "bdccfg1:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_BDCCAP0);
	dev_vdbg(bdc->dev, "bdccap0:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
	dev_vdbg(bdc->dev, "bdccap1:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_USPC);
	dev_vdbg(bdc->dev, "uspc:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_DVCSA);
	dev_vdbg(bdc->dev, "dvcsa:0x%08x\n", temp);
	temp = bdc_readl(bdc->regs, BDC_DVCSB);
	dev_vdbg(bdc->dev, "dvcsb:0x%x08\n", temp);
}

void bdc_dump_epsts(struct bdc *bdc)
{
	u32 temp;

	temp = bdc_readl(bdc->regs, BDC_EPSTS0(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS0:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS1(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS1:0x%x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS2(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS2:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS3(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS3:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS4(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS4:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS5(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS5:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS6(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS6:0x%08x\n", temp);

	temp = bdc_readl(bdc->regs, BDC_EPSTS7(0));
	dev_vdbg(bdc->dev, "BDC_EPSTS7:0x%08x\n", temp);
}

void bdc_dbg_srr(struct bdc *bdc, u32 srr_num)
{
	struct bdc_sr *sr;
	dma_addr_t addr;
	int i;

	sr = bdc->srr.sr_bds;
	addr = bdc->srr.dma_addr;
	dev_vdbg(bdc->dev, "bdc_dbg_srr sr:%p dqp_index:%d\n",
						sr, bdc->srr.dqp_index);
	for (i = 0; i < NUM_SR_ENTRIES; i++) {
		sr = &bdc->srr.sr_bds[i];
		dev_vdbg(bdc->dev, "%llx %08x %08x %08x %08x\n",
					(unsigned long long)addr,
					le32_to_cpu(sr->offset[0]),
					le32_to_cpu(sr->offset[1]),
					le32_to_cpu(sr->offset[2]),
					le32_to_cpu(sr->offset[3]));
		addr += sizeof(*sr);
	}
}

void bdc_dbg_bd_list(struct bdc *bdc, struct bdc_ep *ep)
{
	struct bd_list *bd_list = &ep->bd_list;
	struct bd_table *bd_table;
	struct bdc_bd *bd;
	int tbi, bdi, gbdi;
	dma_addr_t dma;

	gbdi = 0;
	dev_vdbg(bdc->dev,
		"Dump bd list for %s epnum:%d\n",
		ep->name, ep->ep_num);

	dev_vdbg(bdc->dev,
		"tabs:%d max_bdi:%d eqp_bdi:%d hwd_bdi:%d num_bds_table:%d\n",
		bd_list->num_tabs, bd_list->max_bdi, bd_list->eqp_bdi,
		bd_list->hwd_bdi, bd_list->num_bds_table);

	for (tbi = 0; tbi < bd_list->num_tabs; tbi++) {
		bd_table = bd_list->bd_table_array[tbi];
		for (bdi = 0; bdi < bd_list->num_bds_table; bdi++) {
			bd =  bd_table->start_bd + bdi;
			dma = bd_table->dma + (sizeof(struct bdc_bd) * bdi);
			dev_vdbg(bdc->dev,
				"tbi:%2d bdi:%2d gbdi:%2d virt:%p phys:%llx %08x %08x %08x %08x\n",
				tbi, bdi, gbdi++, bd, (unsigned long long)dma,
				le32_to_cpu(bd->offset[0]),
				le32_to_cpu(bd->offset[1]),
				le32_to_cpu(bd->offset[2]),
				le32_to_cpu(bd->offset[3]));
		}
		dev_vdbg(bdc->dev, "\n\n");
	}
}
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>Rui Miguel Silva &lt;rmfrfs@gmail.com&gt;</td><td class='right'>2017-01-23 16:32:57 +0000</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-25 11:36:59 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ehci.h?id=b17c1bba9cec1727451b906d9a0c209774624873'>b17c1bba9cec1727451b906d9a0c209774624873</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/host/ehci.h?id=b17c1bba9cec1727451b906d9a0c209774624873'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=b17c1bba9cec1727451b906d9a0c209774624873'>f0a0f51d405c884e23f695695858d85f6260fec0</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/ehci.h?id=b17c1bba9cec1727451b906d9a0c209774624873'>drivers/usb/host/ehci.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ehci.h?id=9579c4dc21292f375715d7acca439dac9855b3e9'>9579c4dc21292f375715d7acca439dac9855b3e9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ehci.h?id=b17c1bba9cec1727451b906d9a0c209774624873&amp;id2=9579c4dc21292f375715d7acca439dac9855b3e9'>diff</a>)</td></tr></table>
<div class='commit-subject'>staging: greybus: timesync: validate platform state callback</div><div class='commit-msg'>When tearingdown timesync, and not in arche platform, the state platform
callback is not initialized. That will trigger the following NULL
dereferencing.
CallTrace:

 ? gb_timesync_platform_unlock_bus+0x11/0x20 [greybus]
 gb_timesync_teardown+0x85/0xc0 [greybus]
 gb_timesync_svc_remove+0xab/0x190 [greybus]
 gb_svc_del+0x29/0x110 [greybus]
 gb_hd_del+0x14/0x20 [greybus]
 ap_disconnect+0x24/0x60 [gb_es2]
 usb_unbind_interface+0x7a/0x2c0
 __device_release_driver+0x96/0x150
 device_release_driver+0x1e/0x30
 bus_remove_device+0xe7/0x130
 device_del+0x116/0x230
 usb_disable_device+0x97/0x1f0
 usb_disconnect+0x80/0x260
 hub_event+0x5ca/0x10e0
 process_one_work+0x126/0x3b0
 worker_thread+0x55/0x4c0
 ? process_one_work+0x3b0/0x3b0
 kthread+0xc4/0xe0
 ? kthread_park+0xb0/0xb0
 ret_from_fork+0x22/0x30

So, fix that by adding checks before use the callback.

Fixes: 970dc85bd95d ("greybus: timesync: Add timesync core driver")
Cc: &lt;stable@vger.kernel.org&gt; # 4.9.x
Signed-off-by: Rui Miguel Silva &lt;rmfrfs@gmail.com&gt;
Reviewed-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Reviewed-by: Johan Hovold &lt;johan@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/?id=b17c1bba9cec1727451b906d9a0c209774624873'>Diffstat</a> (limited to 'drivers/usb/host/ehci.h')</div><table summary='diffstat' class='diffstat'>