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Revision 070e76cb3ffe43f6855492e77c96680c562598f0 authored by Leonid Yegoshin on 27 November 2014, 11:13:08 UTC, committed by Ralf Baechle on 27 November 2014, 16:21:56 UTC 
MIPS: tlbex: Fix potential HTW race on TLBL/M/S handlers
 
There is a potential race when probing the TLB in TLBL/M/S exception
handlers for a matching entry. Between the time we hit a TLBL/S/M
exception and the time we get to execute the TLBP instruction, the
HTW may have replaced the TLB entry we are interested in hence the TLB
probe may fail. However, in the existing handlers, we never checked the
status of the TLBP (ie check the result in the C0/Index register). We
fix this by adding such a check when the core implements the HTW. If
we couldn't find a matching entry, we return back and try again.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: <stable@vger.kernel.org> # v3.17+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8599/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent b4da18b
Raw File
sh_fsi.h 
#ifndef __SOUND_FSI_H
#define __SOUND_FSI_H

/*
 * Fifo-attached Serial Interface (FSI) support for SH7724
 *
 * Copyright (C) 2009 Renesas Solutions Corp.
 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <sound/soc.h>

/*
 * flags
 */
#define SH_FSI_FMT_SPDIF		(1 << 0) /* spdif for HDMI */
#define SH_FSI_ENABLE_STREAM_MODE	(1 << 1) /* for 16bit data */
#define SH_FSI_CLK_CPG			(1 << 2) /* FSIxCK + FSI-DIV */

struct sh_fsi_port_info {
	unsigned long flags;
	int tx_id;
	int rx_id;
};

struct sh_fsi_platform_info {
	struct sh_fsi_port_info port_a;
	struct sh_fsi_port_info port_b;
};

#endif /* __SOUND_FSI_H */
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