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Commit c1036889 authored by Ravindra Lokhande's avatar Ravindra Lokhande Committed by Takashi Iwai
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ALSA: compress: add support for 32bit calls in a 64bit kernel 



Compress offload does not support ioctl calls from a 32bit userspace
in a 64 bit kernel. This patch adds support for ioctls from a 32bit
userspace in a 64bit kernel

Signed-off-by: default avatarRavindra Lokhande <rlokhande@nvidia.com>
Acked-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6603249d

sound/core/compress_offload.c

+13 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/uio.h>

#include <linux/uaccess.h>

#include <linux/module.h>

#include <linux/compat.h>

#include <sound/core.h>

#include <sound/initval.h>

#include <sound/info.h>
@@ -848,6 +849,15 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 
	return retval;

}



/* support of 32bit userspace on 64bit platforms */

#ifdef CONFIG_COMPAT

static long snd_compr_ioctl_compat(struct file *file, unsigned int cmd,

						unsigned long arg)

{

	return snd_compr_ioctl(file, cmd, (unsigned long)compat_ptr(arg));

}

#endif



static const struct file_operations snd_compr_file_ops = {

		.owner =	THIS_MODULE,

		.open =		snd_compr_open,
@@ -855,6 +865,9 @@ static const struct file_operations snd_compr_file_ops = { 
		.write =	snd_compr_write,

		.read =		snd_compr_read,

		.unlocked_ioctl = snd_compr_ioctl,

#ifdef CONFIG_COMPAT

		.compat_ioctl = snd_compr_ioctl_compat,

#endif

		.mmap =		snd_compr_mmap,

		.poll =		snd_compr_poll,

};