/*
 *	linux/drivers/video/bt455.h
 *
 *	Copyright 2003  Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
 *	Copyright 2016  Maciej W. Rozycki <macro@linux-mips.org>
 *
 *	This file is subject to the terms and conditions of the GNU General
 *	Public License. See the file COPYING in the main directory of this
 *	archive for more details.
 */
#include <linux/types.h>

/*
 * Bt455 byte-wide registers, 32-bit aligned.
 */
struct bt455_regs {
	volatile u8 addr_cmap;
	u8 pad0[3];
	volatile u8 addr_cmap_data;
	u8 pad1[3];
	volatile u8 addr_clr;
	u8 pad2[3];
	volatile u8 addr_ovly;
	u8 pad3[3];
};

static inline void bt455_select_reg(struct bt455_regs *regs, int ir)
{
	mb();
	regs->addr_cmap = ir & 0x0f;
}

static inline void bt455_reset_reg(struct bt455_regs *regs)
{
	mb();
	regs->addr_clr = 0;
}

/*
 * Read/write to a Bt455 color map register.
 */
static inline void bt455_read_cmap_next(struct bt455_regs *regs, u8 *grey)
{
	mb();
	regs->addr_cmap_data;
	rmb();
	*grey = regs->addr_cmap_data & 0xf;
	rmb();
	regs->addr_cmap_data;
}

static inline void bt455_write_cmap_next(struct bt455_regs *regs, u8 grey)
{
	wmb();
	regs->addr_cmap_data = 0x0;
	wmb();
	regs->addr_cmap_data = grey & 0xf;
	wmb();
	regs->addr_cmap_data = 0x0;
}

static inline void bt455_write_ovly_next(struct bt455_regs *regs, u8 grey)
{
	wmb();
	regs->addr_ovly = 0x0;
	wmb();
	regs->addr_ovly = grey & 0xf;
	wmb();
	regs->addr_ovly = 0x0;
}

static inline void bt455_read_cmap_entry(struct bt455_regs *regs,
					 int cr, u8 *grey)
{
	bt455_select_reg(regs, cr);
	bt455_read_cmap_next(regs, grey);
}

static inline void bt455_write_cmap_entry(struct bt455_regs *regs,
					  int cr, u8 grey)
{
	bt455_select_reg(regs, cr);
	bt455_write_cmap_next(regs, grey);
}

static inline void bt455_write_ovly_entry(struct bt455_regs *regs, u8 grey)
{
	bt455_reset_reg(regs);
	bt455_write_ovly_next(regs, grey);
}
ve'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/isabelle.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>isabelle.c</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='4d191b1b63c209e37bf27938ef365244d3c41084'/><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>Marc Zyngier &lt;marc.zyngier@arm.com&gt;</td><td class='right'>2017-01-17 14:21:56 +0000</td></tr>
<tr><th>committer</th><td>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-17 08:41:51 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>4d191b1b63c209e37bf27938ef365244d3c41084</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/codecs/isabelle.c?id=4d191b1b63c209e37bf27938ef365244d3c41084'>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=4d191b1b63c209e37bf27938ef365244d3c41084'>f2ab6cdb65ddacdf2e7c019cd55e353f0c16b400</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>sound/soc/codecs/isabelle.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=51ebfc92b72b4f7dac1ab45683bf56741e454b8c'>51ebfc92b72b4f7dac1ab45683bf56741e454b8c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/isabelle.c?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084&amp;id2=51ebfc92b72b4f7dac1ab45683bf56741e454b8c'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI/MSI: pci-xgene-msi: Fix CPU hotplug registration handling</div><div class='commit-msg'>The conversion to the new hotplug state machine introduced a regression
where a successful hotplug registration would be treated as an error,
effectively disabling the MSI driver forever.

Fix it by doing the proper check on the return value.

Fixes: 9c248f8896e6 ("PCI/xgene-msi: Convert to hotplug state machine")
Signed-off-by: Marc Zyngier &lt;marc.zyngier@arm.com&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
Acked-by: Sebastian Andrzej Siewior &lt;bigeasy@linutronix.de&gt;
Tested-by: Duc Dang &lt;dhdang@apm.com&gt;
CC: Thomas Gleixner &lt;tglx@linutronix.de&gt;
CC: stable@vger.kernel.org</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4d191b1b63c209e37bf27938ef365244d3c41084'>Diffstat</a> (limited to 'sound/soc/codecs/isabelle.c')</div><table summary='diffstat' class='diffstat'>