| Message ID | 20230814115523.15279-18-tiwai@suse.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | ALSA: Generic PCM copy ops using iov_iter | expand |
On 14/Aug/2023 13:55, Takashi Iwai wrote: > This patch converts the solo6x10 driver code to use the new unified > PCM copy callback. It's a straightforward conversion from *_user() to > *_iter() variants. As copy_to_iter() updates the internal offest at > each write, we can drop the dst counter update in the loop, too. > > Note that copy_from/to_iter() returns the copied bytes, hence the > error condition is inverted from copy_from/to_user(). > > Cc: Bluecherry Maintainers <maintainers@bluecherrydvr.com> > Cc: Anton Sviridenko <anton@corp.bluecherry.net> > Cc: Andrey Utkin <andrey_utkin@fastmail.com> > Cc: Ismael Luceno <ismael@iodev.co.uk> > Cc: Mauro Carvalho Chehab <mchehab@kernel.org> > Cc: linux-media@vger.kernel.org > Signed-off-by: Takashi Iwai <tiwai@suse.de> > --- > drivers/media/pci/solo6x10/solo6x10-g723.c | 38 +++------------------- > 1 file changed, 5 insertions(+), 33 deletions(-) > > diff --git a/drivers/media/pci/solo6x10/solo6x10-g723.c b/drivers/media/pci/solo6x10/solo6x10-g723.c > index 6cebad665565..aceacb822cab 100644 > --- a/drivers/media/pci/solo6x10/solo6x10-g723.c > +++ b/drivers/media/pci/solo6x10/solo6x10-g723.c > @@ -204,9 +204,9 @@ 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_user(struct snd_pcm_substream *ss, int channel, > - unsigned long pos, void __user *dst, > - unsigned long count) > +static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel, > + unsigned long pos, struct iov_iter *dst, > + unsigned long count) > { > struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); > struct solo_dev *solo_dev = solo_pcm->solo_dev; > @@ -223,35 +223,8 @@ static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, > if (err) > return err; > > - if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) > + if (!copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst)) > return -EFAULT; > - dst += G723_PERIOD_BYTES; > - } > - > - return 0; > -} > - > -static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, > - unsigned long pos, void *dst, > - unsigned long count) > -{ > - 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; > @@ -263,8 +236,7 @@ static const struct snd_pcm_ops snd_solo_pcm_ops = { > .prepare = snd_solo_pcm_prepare, > .trigger = snd_solo_pcm_trigger, > .pointer = snd_solo_pcm_pointer, > - .copy_user = snd_solo_pcm_copy_user, > - .copy_kernel = snd_solo_pcm_copy_kernel, > + .copy = snd_solo_pcm_copy, > }; > > static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, > -- > 2.35.3 > Signed-off-by: Ismael Luceno <ismael@iodev.co.uk>
On Mon, 14 Aug 2023 14:15:18 +0200, Ismael Luceno wrote: > > On 14/Aug/2023 13:55, Takashi Iwai wrote: > > This patch converts the solo6x10 driver code to use the new unified > > PCM copy callback. It's a straightforward conversion from *_user() to > > *_iter() variants. As copy_to_iter() updates the internal offest at > > each write, we can drop the dst counter update in the loop, too. > > > > Note that copy_from/to_iter() returns the copied bytes, hence the > > error condition is inverted from copy_from/to_user(). > > > > Cc: Bluecherry Maintainers <maintainers@bluecherrydvr.com> > > Cc: Anton Sviridenko <anton@corp.bluecherry.net> > > Cc: Andrey Utkin <andrey_utkin@fastmail.com> > > Cc: Ismael Luceno <ismael@iodev.co.uk> > > Cc: Mauro Carvalho Chehab <mchehab@kernel.org> > > Cc: linux-media@vger.kernel.org > > Signed-off-by: Takashi Iwai <tiwai@suse.de> > > --- > > drivers/media/pci/solo6x10/solo6x10-g723.c | 38 +++------------------- > > 1 file changed, 5 insertions(+), 33 deletions(-) > > > > diff --git a/drivers/media/pci/solo6x10/solo6x10-g723.c b/drivers/media/pci/solo6x10/solo6x10-g723.c > > index 6cebad665565..aceacb822cab 100644 > > --- a/drivers/media/pci/solo6x10/solo6x10-g723.c > > +++ b/drivers/media/pci/solo6x10/solo6x10-g723.c > > @@ -204,9 +204,9 @@ 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_user(struct snd_pcm_substream *ss, int channel, > > - unsigned long pos, void __user *dst, > > - unsigned long count) > > +static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel, > > + unsigned long pos, struct iov_iter *dst, > > + unsigned long count) > > { > > struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); > > struct solo_dev *solo_dev = solo_pcm->solo_dev; > > @@ -223,35 +223,8 @@ static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, > > if (err) > > return err; > > > > - if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) > > + if (!copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst)) > > return -EFAULT; > > - dst += G723_PERIOD_BYTES; > > - } > > - > > - return 0; > > -} > > - > > -static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, > > - unsigned long pos, void *dst, > > - unsigned long count) > > -{ > > - 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; > > @@ -263,8 +236,7 @@ static const struct snd_pcm_ops snd_solo_pcm_ops = { > > .prepare = snd_solo_pcm_prepare, > > .trigger = snd_solo_pcm_trigger, > > .pointer = snd_solo_pcm_pointer, > > - .copy_user = snd_solo_pcm_copy_user, > > - .copy_kernel = snd_solo_pcm_copy_kernel, > > + .copy = snd_solo_pcm_copy, > > }; > > > > static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, > > -- > > 2.35.3 > > > > Signed-off-by: Ismael Luceno <ismael@iodev.co.uk> You meant Reviewed-by or Acked-by? Signed-off-by is a tag used when you carry a patch. thanks, Takashi
diff --git a/drivers/media/pci/solo6x10/solo6x10-g723.c b/drivers/media/pci/solo6x10/solo6x10-g723.c index 6cebad665565..aceacb822cab 100644 --- a/drivers/media/pci/solo6x10/solo6x10-g723.c +++ b/drivers/media/pci/solo6x10/solo6x10-g723.c @@ -204,9 +204,9 @@ 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_user(struct snd_pcm_substream *ss, int channel, - unsigned long pos, void __user *dst, - unsigned long count) +static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel, + unsigned long pos, struct iov_iter *dst, + unsigned long count) { struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); struct solo_dev *solo_dev = solo_pcm->solo_dev; @@ -223,35 +223,8 @@ static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, if (err) return err; - if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) + if (!copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst)) return -EFAULT; - dst += G723_PERIOD_BYTES; - } - - return 0; -} - -static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, - unsigned long pos, void *dst, - unsigned long count) -{ - 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; @@ -263,8 +236,7 @@ static const struct snd_pcm_ops snd_solo_pcm_ops = { .prepare = snd_solo_pcm_prepare, .trigger = snd_solo_pcm_trigger, .pointer = snd_solo_pcm_pointer, - .copy_user = snd_solo_pcm_copy_user, - .copy_kernel = snd_solo_pcm_copy_kernel, + .copy = snd_solo_pcm_copy, }; static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
This patch converts the solo6x10 driver code to use the new unified PCM copy callback. It's a straightforward conversion from *_user() to *_iter() variants. As copy_to_iter() updates the internal offest at each write, we can drop the dst counter update in the loop, too. Note that copy_from/to_iter() returns the copied bytes, hence the error condition is inverted from copy_from/to_user(). Cc: Bluecherry Maintainers <maintainers@bluecherrydvr.com> Cc: Anton Sviridenko <anton@corp.bluecherry.net> Cc: Andrey Utkin <andrey_utkin@fastmail.com> Cc: Ismael Luceno <ismael@iodev.co.uk> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-media@vger.kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de> --- drivers/media/pci/solo6x10/solo6x10-g723.c | 38 +++------------------- 1 file changed, 5 insertions(+), 33 deletions(-)