/*
 * Load Analog Devices SigmaStudio firmware files
 *
 * Copyright 2009-2011 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/export.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/unaligned.h>

#include "sigmadsp.h"

static int sigmadsp_write_i2c(void *control_data,
	unsigned int addr, const uint8_t data[], size_t len)
{
	uint8_t *buf;
	int ret;

	buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA);
	if (!buf)
		return -ENOMEM;

	put_unaligned_be16(addr, buf);
	memcpy(buf + 2, data, len);

	ret = i2c_master_send(control_data, buf, len + 2);

	kfree(buf);

	if (ret < 0)
		return ret;

	return 0;
}

static int sigmadsp_read_i2c(void *control_data,
	unsigned int addr, uint8_t data[], size_t len)
{
	struct i2c_client *client = control_data;
	struct i2c_msg msgs[2];
	uint8_t buf[2];
	int ret;

	put_unaligned_be16(addr, buf);

	msgs[0].addr = client->addr;
	msgs[0].len = sizeof(buf);
	msgs[0].buf = buf;
	msgs[0].flags = 0;

	msgs[1].addr = client->addr;
	msgs[1].len = len;
	msgs[1].buf = data;
	msgs[1].flags = I2C_M_RD;

	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	if (ret < 0)
		return ret;
	else if (ret != ARRAY_SIZE(msgs))
		return -EIO;
	return 0;
}

/**
 * devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
 * @client: The parent I2C device
 * @ops: The sigmadsp_ops to use for this instance
 * @firmware_name: Name of the firmware file to load
 *
 * Allocates a SigmaDSP instance and loads the specified firmware file.
 *
 * Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
 */
struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
	const struct sigmadsp_ops *ops,	const char *firmware_name)
{
	struct sigmadsp *sigmadsp;

	sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
	if (IS_ERR(sigmadsp))
		return sigmadsp;

	sigmadsp->control_data = client;
	sigmadsp->write = sigmadsp_write_i2c;
	sigmadsp->read = sigmadsp_read_i2c;

	return sigmadsp;
}
EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
MODULE_LICENSE("GPL");
?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/firewire/amdtp-stream.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/firewire?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c'>firewire</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/firewire/amdtp-stream.h?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c'>amdtp-stream.h</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/sound/firewire/amdtp-stream.h?h=nds-private-remove&amp;id=3c19bd6c52d441893ba19b3418825b27cfa4fd9c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
alue='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>Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;</td><td class='right'>2017-02-03 17:10:28 +1100</td></tr>
<tr><th>committer</th><td>Michael Ellerman &lt;mpe@ellerman.id.au&gt;</td><td class='right'>2017-02-08 23:36:29 +1100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/vx222/vx222_ops.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>d7df2443cd5f67fc6ee7c05a88e4996e8177f91b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/vx222/vx222_ops.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>098a7c0ca4fceb8a65cb1f693c9d71990388933d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/vx222/vx222_ops.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>sound/pci/vx222/vx222_ops.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/vx222/vx222_ops.c?id=a0615a16f7d0ceb5804d295203c302d496d8ee91'>a0615a16f7d0ceb5804d295203c302d496d8ee91</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/vx222/vx222_ops.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b&amp;id2=a0615a16f7d0ceb5804d295203c302d496d8ee91'>diff</a>)</td></tr></table>
<div class='commit-subject'>powerpc/mm: Fix spurrious segfaults on radix with autonuma</div><div class='commit-msg'>When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it
clears all the protection bits but leave the PTE valid.

With the Radix MMU, an attempt at executing from such a PTE will
take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G".

It is thus incorrect to treat all such faults as errors. We should
pass them to handle_mm_fault() for autonuma to deal with. The case
of pages that are really not executable is handled by the existing
test for VM_EXEC further down.

That leaves us with catching the kernel attempts at executing user
pages. We can catch that earlier, even before we do find_vma.

It is never valid on powerpc for the kernel to take an exec fault
to begin with. So fold that test with the existing test for the
kernel faulting on kernel addresses to bail out early.

Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report")
Signed-off-by: Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;
Reviewed-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Acked-by: Balbir Singh &lt;bsingharora@gmail.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>Diffstat</a> (limited to 'sound/pci/vx222/vx222_ops.c')</div><table summary='diffstat' class='diffstat'>