/*
 * lowlevel.c
 *
 * PURPOSE
 *  Low Level Device Routines for the UDF filesystem
 *
 * COPYRIGHT
 *	This file is distributed under the terms of the GNU General Public
 *	License (GPL). Copies of the GPL can be obtained from:
 *		ftp://prep.ai.mit.edu/pub/gnu/GPL
 *	Each contributing author retains all rights to their own work.
 *
 *  (C) 1999-2001 Ben Fennema
 *
 * HISTORY
 *
 *  03/26/99 blf  Created.
 */

#include "udfdecl.h"

#include <linux/blkdev.h>
#include <linux/cdrom.h>
#include <linux/uaccess.h>

#include "udf_sb.h"

unsigned int udf_get_last_session(struct super_block *sb)
{
	struct cdrom_multisession ms_info;
	unsigned int vol_desc_start;
	struct block_device *bdev = sb->s_bdev;
	int i;

	vol_desc_start = 0;
	ms_info.addr_format = CDROM_LBA;
	i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long)&ms_info);

	if (i == 0) {
		udf_debug("XA disk: %s, vol_desc_start=%d\n",
			  ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba);
		if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
			vol_desc_start = ms_info.addr.lba;
	} else {
		udf_debug("CDROMMULTISESSION not supported: rc=%d\n", i);
	}
	return vol_desc_start;
}

unsigned long udf_get_last_block(struct super_block *sb)
{
	struct block_device *bdev = sb->s_bdev;
	unsigned long lblock = 0;

	/*
	 * ioctl failed or returned obviously bogus value?
	 * Try using the device size...
	 */
	if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
	    lblock == 0)
		lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits;

	if (lblock)
		return lblock - 1;
	else
		return 0;
}
ummary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/scsi/viosrp.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/scsi/viosrp.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/scsi?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>scsi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>viosrp.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3c223c19aea85d3dda1416c187915f4a30b04b1f'/><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>Markus Mayer &lt;mmayer@broadcom.com&gt;</td><td class='right'>2016-12-19 12:10:28 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-01-27 11:43:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>2d2021f8161db3e9ed38b9a966a225b66dff8e58</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>include/scsi/viosrp.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/viosrp.h?id=9b02c54bc951fca884ba5719f42a27e8240965bf'>9b02c54bc951fca884ba5719f42a27e8240965bf</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/scsi/viosrp.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f&amp;id2=9b02c54bc951fca884ba5719f42a27e8240965bf'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: brcmstb-avs-cpufreq: properly retrieve P-state upon suspend</div><div class='commit-msg'>The AVS GET_PMAP command does return a P-state along with the P-map
information. However, that P-state is the initial P-state when the
P-map was first downloaded to AVS. It is *not* the current P-state.

Therefore, we explicitly retrieve the P-state using the GET_PSTATE
command.

Signed-off-by: Markus Mayer &lt;mmayer@broadcom.com&gt;
Acked-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>Diffstat</a> (limited to 'include/scsi/viosrp.h')</div><table summary='diffstat' class='diffstat'>