diff options
| -rw-r--r-- | sound/core/rawmidi.c | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index f94694cb47f8..f7ea7287c59c 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -911,7 +911,8 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, } static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, - unsigned char *buf, long count, int kernel) + unsigned char __user *userbuf, + unsigned char *kernelbuf, long count) { unsigned long flags; long result = 0, count1; @@ -924,11 +925,11 @@ static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, spin_lock_irqsave(&runtime->lock, flags); if (count1 > (int)runtime->avail) count1 = runtime->avail; - if (kernel) { - memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); - } else { + if (kernelbuf) + memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); + if (userbuf) { spin_unlock_irqrestore(&runtime->lock, flags); - if (copy_to_user((char __user *)buf + result, + if (copy_to_user(userbuf + result, runtime->buffer + runtime->appl_ptr, count1)) { return result > 0 ? result : -EFAULT; } @@ -948,7 +949,7 @@ long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, unsigned char *buf, long count) { snd_rawmidi_input_trigger(substream, 1); - return snd_rawmidi_kernel_read1(substream, buf, count, 1); + return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); } static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, @@ -989,8 +990,9 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun } spin_unlock_irq(&runtime->lock); count1 = snd_rawmidi_kernel_read1(substream, - (unsigned char __force *)buf, - count, 0); + (unsigned char __user *)buf, + NULL/*kernelbuf*/, + count); if (count1 < 0) return result > 0 ? result : count1; result += count1; @@ -1131,13 +1133,15 @@ int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, } static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, - const unsigned char *buf, long count, int kernel) + const unsigned char __user *userbuf, + const unsigned char *kernelbuf, + long count) { unsigned long flags; long count1, result; struct snd_rawmidi_runtime *runtime = substream->runtime; - snd_assert(buf != NULL, return -EINVAL); + snd_assert(kernelbuf != NULL || userbuf != NULL, return -EINVAL); snd_assert(runtime->buffer != NULL, return -EINVAL); result = 0; @@ -1154,12 +1158,13 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, count1 = count; if (count1 > (long)runtime->avail) count1 = runtime->avail; - if (kernel) { - memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); - } else { + if (kernelbuf) + memcpy(runtime->buffer + runtime->appl_ptr, + kernelbuf + result, count1); + else if (userbuf) { spin_unlock_irqrestore(&runtime->lock, flags); if (copy_from_user(runtime->buffer + runtime->appl_ptr, - (char __user *)buf, count1)) { + userbuf + result, count1)) { spin_lock_irqsave(&runtime->lock, flags); result = result > 0 ? result : -EFAULT; goto __end; @@ -1170,7 +1175,6 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, runtime->appl_ptr %= runtime->buffer_size; runtime->avail -= count1; result += count1; - buf += count1; count -= count1; } __end: @@ -1184,7 +1188,7 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, const unsigned char *buf, long count) { - return snd_rawmidi_kernel_write1(substream, buf, count, 1); + return snd_rawmidi_kernel_write1(substream, NULL, buf, count); } static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, @@ -1224,9 +1228,7 @@ static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, spin_lock_irq(&runtime->lock); } spin_unlock_irq(&runtime->lock); - count1 = snd_rawmidi_kernel_write1(substream, - (unsigned char __force *)buf, - count, 0); + count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); if (count1 < 0) return result > 0 ? result : count1; result += count1; |