This patch converts the SB Emu8000 driver code to use the new unified PCM copy callback. The conversion is a bit complicated because of many open code in emu8000_pcm.c. GET_VAL() and LOOP_WRITE() macros were rewritten / simplified with copy_from_iter(). As copy_from_iter() updates the internal offset value, we can drop the corresponding part, too.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/isa/sb/emu8000_pcm.c | 74 +++++++++----------------------------- 1 file changed, 16 insertions(+), 58 deletions(-)
diff --git a/sound/isa/sb/emu8000_pcm.c b/sound/isa/sb/emu8000_pcm.c index c8afc4347c54..9e59d0b2a3fe 100644 --- a/sound/isa/sb/emu8000_pcm.c +++ b/sound/isa/sb/emu8000_pcm.c @@ -409,39 +409,25 @@ do { \ return -EAGAIN;\ } while (0)
-enum { - COPY_USER, COPY_KERNEL, FILL_SILENCE, -}; - -#define GET_VAL(sval, buf, mode) \ +#define GET_VAL(sval, iter) \ do { \ - switch (mode) { \ - case FILL_SILENCE: \ + if (!iter) \ sval = 0; \ - break; \ - case COPY_KERNEL: \ - sval = *buf++; \ - break; \ - default: \ - if (get_user(sval, (unsigned short __user *)buf)) \ - return -EFAULT; \ - buf++; \ - break; \ - } \ + else if (!copy_from_iter(&sval, 2, iter)) \ + return -EFAULT; \ } while (0)
#ifdef USE_NONINTERLEAVE
-#define LOOP_WRITE(rec, offset, _buf, count, mode) \ +#define LOOP_WRITE(rec, offset, iter, count) \ do { \ struct snd_emu8000 *emu = (rec)->emu; \ - unsigned short *buf = (__force unsigned short *)(_buf); \ snd_emu8000_write_wait(emu, 1); \ EMU8000_SMALW_WRITE(emu, offset); \ while (count > 0) { \ unsigned short sval; \ CHECK_SCHEDULER(); \ - GET_VAL(sval, buf, mode); \ + GET_VAL(sval, iter); \ EMU8000_SMLD_WRITE(emu, sval); \ count--; \ } \ @@ -450,27 +436,14 @@ enum { /* copy one channel block */ static int emu8k_pcm_copy(struct snd_pcm_substream *subs, int voice, unsigned long pos, - void __user *src, unsigned long count) + struct iov_iter *src, unsigned long count) { struct snd_emu8k_pcm *rec = subs->runtime->private_data;
/* convert to word unit */ pos = (pos << 1) + rec->loop_start[voice]; count <<= 1; - LOOP_WRITE(rec, pos, src, count, COPY_USER); - return 0; -} - -static int emu8k_pcm_copy_kernel(struct snd_pcm_substream *subs, - int voice, unsigned long pos, - void *src, unsigned long count) -{ - struct snd_emu8k_pcm *rec = subs->runtime->private_data; - - /* convert to word unit */ - pos = (pos << 1) + rec->loop_start[voice]; - count <<= 1; - LOOP_WRITE(rec, pos, src, count, COPY_KERNEL); + LOOP_WRITE(rec, pos, src, count); return 0; }
@@ -483,16 +456,15 @@ static int emu8k_pcm_silence(struct snd_pcm_substream *subs, /* convert to word unit */ pos = (pos << 1) + rec->loop_start[voice]; count <<= 1; - LOOP_WRITE(rec, pos, NULL, count, FILL_SILENCE); + LOOP_WRITE(rec, pos, USER_SOCKPTR(NULL), count); return 0; }
#else /* interleave */
-#define LOOP_WRITE(rec, pos, _buf, count, mode) \ +#define LOOP_WRITE(rec, pos, iter, count) \ do { \ struct snd_emu8000 *emu = rec->emu; \ - unsigned short *buf = (__force unsigned short *)(_buf); \ snd_emu8000_write_wait(emu, 1); \ EMU8000_SMALW_WRITE(emu, pos + rec->loop_start[0]); \ if (rec->voices > 1) \ @@ -500,11 +472,11 @@ static int emu8k_pcm_silence(struct snd_pcm_substream *subs, while (count > 0) { \ unsigned short sval; \ CHECK_SCHEDULER(); \ - GET_VAL(sval, buf, mode); \ + GET_VAL(sval, iter); \ EMU8000_SMLD_WRITE(emu, sval); \ if (rec->voices > 1) { \ CHECK_SCHEDULER(); \ - GET_VAL(sval, buf, mode); \ + GET_VAL(sval, iter); \ EMU8000_SMRD_WRITE(emu, sval); \ } \ count--; \ @@ -518,27 +490,14 @@ static int emu8k_pcm_silence(struct snd_pcm_substream *subs, */ static int emu8k_pcm_copy(struct snd_pcm_substream *subs, int voice, unsigned long pos, - void __user *src, unsigned long count) + struct iov_iter *src, unsigned long count) { struct snd_emu8k_pcm *rec = subs->runtime->private_data;
/* convert to frames */ pos = bytes_to_frames(subs->runtime, pos); count = bytes_to_frames(subs->runtime, count); - LOOP_WRITE(rec, pos, src, count, COPY_USER); - return 0; -} - -static int emu8k_pcm_copy_kernel(struct snd_pcm_substream *subs, - int voice, unsigned long pos, - void *src, unsigned long count) -{ - struct snd_emu8k_pcm *rec = subs->runtime->private_data; - - /* convert to frames */ - pos = bytes_to_frames(subs->runtime, pos); - count = bytes_to_frames(subs->runtime, count); - LOOP_WRITE(rec, pos, src, count, COPY_KERNEL); + LOOP_WRITE(rec, pos, src, count); return 0; }
@@ -550,7 +509,7 @@ static int emu8k_pcm_silence(struct snd_pcm_substream *subs, /* convert to frames */ pos = bytes_to_frames(subs->runtime, pos); count = bytes_to_frames(subs->runtime, count); - LOOP_WRITE(rec, pos, NULL, count, FILL_SILENCE); + LOOP_WRITE(rec, pos, NULL, count); return 0; } #endif @@ -666,8 +625,7 @@ static const struct snd_pcm_ops emu8k_pcm_ops = { .prepare = emu8k_pcm_prepare, .trigger = emu8k_pcm_trigger, .pointer = emu8k_pcm_pointer, - .copy_user = emu8k_pcm_copy, - .copy_kernel = emu8k_pcm_copy_kernel, + .copy = emu8k_pcm_copy, .fill_silence = emu8k_pcm_silence, };