https://github.com/torvalds/linux
Revision 98a226ed21949601b270f7ea20abc9f72f7b0be9 authored by Takashi Iwai on 10 June 2015, 08:27:00 UTC, committed by Takashi Iwai on 10 June 2015, 08:31:10 UTC
Along with the transition to regmap for managing the cached parameter
reads, the caps overwrite was also moved to regmap cache.  The cache
change itself works, but it still tries to write the non-existing verb
(the HDA parameter is read-only) wrongly.  It's harmless in most
cases, but some chips are picky and may result in the codec
communication stall.

This patch avoids it just by adding the missing flag check in
reg_write ops.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 parent 132bd96
Raw File
Tip revision: 98a226ed21949601b270f7ea20abc9f72f7b0be9 authored by Takashi Iwai on 10 June 2015, 08:27:00 UTC
ALSA: hda - Don't actually write registers for caps overwrites
Tip revision: 98a226e
usbdevice_fs.h
/*****************************************************************************/

/*
 *	usbdevice_fs.h  --  USB device file system.
 *
 *	Copyright (C) 2000
 *          Thomas Sailer (sailer@ife.ee.ethz.ch)
 *
 *	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 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  History:
 *   0.1  04.01.2000  Created
 */

/*****************************************************************************/
#ifndef _LINUX_USBDEVICE_FS_H
#define _LINUX_USBDEVICE_FS_H

#include <uapi/linux/usbdevice_fs.h>

#ifdef CONFIG_COMPAT
#include <linux/compat.h>

struct usbdevfs_ctrltransfer32 {
        u8 bRequestType;
        u8 bRequest;
        u16 wValue;
        u16 wIndex;
        u16 wLength;
        u32 timeout;  /* in milliseconds */
        compat_caddr_t data;
};

struct usbdevfs_bulktransfer32 {
        compat_uint_t ep;
        compat_uint_t len;
        compat_uint_t timeout; /* in milliseconds */
        compat_caddr_t data;
};

struct usbdevfs_disconnectsignal32 {
        compat_int_t signr;
        compat_caddr_t context;
};

struct usbdevfs_urb32 {
	unsigned char type;
	unsigned char endpoint;
	compat_int_t status;
	compat_uint_t flags;
	compat_caddr_t buffer;
	compat_int_t buffer_length;
	compat_int_t actual_length;
	compat_int_t start_frame;
	compat_int_t number_of_packets;
	compat_int_t error_count;
	compat_uint_t signr;
	compat_caddr_t usercontext; /* unused */
	struct usbdevfs_iso_packet_desc iso_frame_desc[0];
};

struct usbdevfs_ioctl32 {
	s32 ifno;
	s32 ioctl_code;
	compat_caddr_t data;
};
#endif
#endif /* _LINUX_USBDEVICE_FS_H */
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