@@ -128,7 +128,7 @@ static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
runtime->avail = 0;
else
runtime->avail = runtime->buffer_size;
- runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL);
+ runtime->buffer = kvmalloc(runtime->buffer_size, GFP_KERNEL);
if (!runtime->buffer) {
kfree(runtime);
return -ENOMEM;
@@ -142,7 +142,7 @@ static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
{
struct snd_rawmidi_runtime *runtime = substream->runtime;
- kfree(runtime->buffer);
+ kvfree(runtime->buffer);
kfree(runtime);
substream->runtime = NULL;
return 0;
@@ -654,7 +654,7 @@ static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime,
if (params->avail_min < 1 || params->avail_min > params->buffer_size)
return -EINVAL;
if (params->buffer_size != runtime->buffer_size) {
- newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
+ newbuf = kvmalloc(params->buffer_size, GFP_KERNEL);
if (!newbuf)
return -ENOMEM;
spin_lock_irq(&runtime->lock);
@@ -663,7 +663,7 @@ static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime,
runtime->buffer_size = params->buffer_size;
__reset_runtime_ptrs(runtime, is_input);
spin_unlock_irq(&runtime->lock);
- kfree(oldbuf);
+ kvfree(oldbuf);
}
runtime->avail_min = params->avail_min;
return 0;
The size of in-kernel rawmidi buffers may be big up to 1MB, and it can be specified freely by user-space; which implies that user-space may trigger kmalloc() errors frequently. This patch replaces the buffer allocation via kvmalloc() for dealing with bigger buffers gracefully. Signed-off-by: Takashi Iwai <tiwai@suse.de> --- sound/core/rawmidi.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)