/*
 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.

 * 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, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.See the GNU General Public License
 * for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __GLOBAL_H__
#define __GLOBAL_H__

#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/console.h>
#include <linux/timer.h>

#include "debug.h"

#include "viafbdev.h"
#include "chip.h"
#include "accel.h"
#include "share.h"
#include "dvi.h"
#include "viamode.h"
#include "hw.h"

#include "lcd.h"
#include "ioctl.h"
#include "via_utility.h"
#include "vt1636.h"
#include "tblDPASetting.h"

/* External struct*/

extern int viafb_platform_epia_dvi;
extern int viafb_device_lcd_dualedge;
extern int viafb_bus_width;
extern int viafb_display_hardware_layout;
extern struct offset offset_reg;
extern struct viafb_par *viaparinfo;
extern struct viafb_par *viaparinfo1;
extern struct fb_info *viafbinfo;
extern struct fb_info *viafbinfo1;
extern int viafb_DeviceStatus;
extern int viafb_refresh;
extern int viafb_refresh1;
extern int viafb_lcd_dsp_method;
extern int viafb_lcd_mode;

extern int viafb_CRT_ON;
extern unsigned int viafb_second_xres;
extern unsigned int viafb_second_yres;
extern int viafb_hotplug_Xres;
extern int viafb_hotplug_Yres;
extern int viafb_hotplug_bpp;
extern int viafb_hotplug_refresh;
extern int viafb_primary_dev;

extern int viafb_lcd_panel_id;

#endif /* __GLOBAL_H__ */
5f2'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/i2c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/i2c?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>i2c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='e185934ff94466b4a449165e5f1c164a44d005f2'/><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>Nicolai Stange &lt;nicstange@gmail.com&gt;</td><td class='right'>2016-12-07 22:21:33 +0100</td></tr>
<tr><th>committer</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2016-12-07 16:29:09 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/i2c?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>e185934ff94466b4a449165e5f1c164a44d005f2</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/i2c?id=e185934ff94466b4a449165e5f1c164a44d005f2'>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=e185934ff94466b4a449165e5f1c164a44d005f2'>c773d05d4c72292e3babd4ce1a8bd56d965ebb4c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/i2c?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>sound/i2c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/i2c?h=nds-private-remove&amp;id=5c3ef39738f74a3759918cc1a1ad099504f9d1b7'>5c3ef39738f74a3759918cc1a1ad099504f9d1b7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/i2c?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2&amp;id2=5c3ef39738f74a3759918cc1a1ad099504f9d1b7'>diff</a>)</td></tr></table>
<div class='commit-subject'>libata-scsi: disable SCT Write Same for the moment</div><div class='commit-msg'>SCT Write Same support had been introduced with
commit 7b2030942859 ("libata: Add support for SCT Write Same")

Some problems, namely excessive userspace segfaults, had been reported at

  http://lkml.kernel.org/r/20160908192736.GA4356@gmail.com

This lead to commit 0ce1b18c42a5 ("libata: Some drives failing on
SCT Write Same") which strived to disable SCT Write Same on !ZAC devices.
Due to the way this was done and to the logic in sd_config_write_same(),
this didn't work for those devices that have
-&gt;max_ws_blocks &gt; SD_MAX_WS10_BLOCKS: for these, -&gt;no_write_same and
-&gt;max_write_same_sectors would still be non-zero,
but -&gt;ws10 == -&gt;ws16 == 0. This would cause sd_setup_write_same_cmnd() to
demultiplex REQ_OP_WRITE_SAME requests to WRITE_SAME, and these in turn
aren't supported by libata-scsi:

  EXT4-fs (dm-1): Delayed block allocation failed for inode 2625094 at
                  logical offset 2032 with max blocks 2 with error 121
  EXT4-fs (dm-1): This should not happen!! Data will be lost

121 == EREMOTEIO is what scsi_io_completion() asserts in case of
invalid opcodes.

Back to the original problem of userspace segfaults: this can be tracked
down to ata_format_sct_write_same() overwriting the input page. Sometimes,
this page is ZERO_PAGE(0) which ceases to be filled with zeros from that
point on. Since ZERO_PAGE(0) is used for userspace .bss mappings, code of
the following is doomed:

  static char *a = NULL; /* .bss */
  ...
  if (a)
    *a = 'a';

This problem is not solved by disabling SCT Write Same for !ZAC devices
only.

It can certainly be fixed, but the final release is quite close -- so
disable SCT Write Same for all ATA devices rather than introducing some
SCT key buffer allocation schemes at this point.

Fixes: 7b2030942859 ("libata: Add support for SCT Write Same")
Signed-off-by: Nicolai Stange &lt;nicstange@gmail.com&gt;
Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e185934ff94466b4a449165e5f1c164a44d005f2'>Diffstat</a> (limited to 'sound/i2c')</div><table summary='diffstat' class='diffstat'>