hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

media: solo6x10: get rid of an address space warning 

Instead of using an ancillary function to avoid duplicating
a small portion of code that copies data either to kernelspace
or between userspace-kernelspace, duplicate the code,
as it prevents static analyzers to complain about it:

	drivers/media/pci/solo6x10/solo6x10-g723.c:260:46: warning: cast removes address space of expression

The hole idea of using __user is to make sure that the code is
doing the right thing with address space, so there's no
sense on use casting.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2018-03-23 07:24:16 -04:00
parent 70ae6a049f
commit 43e69758e6
1 changed files with 24 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/media/pci/solo6x10/solo6x10-g723.c
View File

@ -223,9 +223,9 @@ static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
return idx * G723_FRAMES_PER_PAGE;
}
static int __snd_solo_pcm_copy(struct snd_pcm_substream *ss,
unsigned long pos, void *dst,
unsigned long count, bool in_kernel)
static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel,
unsigned long pos, void __user *dst,
unsigned long count)
{
struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
struct solo_dev *solo_dev = solo_pcm->solo_dev;
@ -242,10 +242,7 @@ static int __snd_solo_pcm_copy(struct snd_pcm_substream *ss,
if (err)
return err;
if (in_kernel)
memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES);
else if (copy_to_user((void __user *)dst,
solo_pcm->g723_buf, G723_PERIOD_BYTES))
if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES))
return -EFAULT;
dst += G723_PERIOD_BYTES;
}
@ -253,18 +250,30 @@ static int __snd_solo_pcm_copy(struct snd_pcm_substream *ss,
return 0;
}
static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel,
unsigned long pos, void __user *dst,
unsigned long count)
{
return __snd_solo_pcm_copy(ss, pos, (void *)dst, count, false);
}
static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel,
unsigned long pos, void *dst,
unsigned long count)
{
return __snd_solo_pcm_copy(ss, pos, dst, count, true);
struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
struct solo_dev *solo_dev = solo_pcm->solo_dev;
int err, i;
for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
int page = (pos / G723_FRAMES_PER_PAGE) + i;
err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
SOLO_G723_EXT_ADDR(solo_dev) +
(page * G723_PERIOD_BLOCK) +
(ss->number * G723_PERIOD_BYTES),
G723_PERIOD_BYTES, 0, 0);
if (err)
return err;
memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES);
dst += G723_PERIOD_BYTES;
}
return 0;
}
static const struct snd_pcm_ops snd_solo_pcm_ops = {