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authorTakashi Iwai <tiwai@suse.de>2020-06-15 18:00:43 +0200
committerTakashi Iwai <tiwai@suse.de>2020-06-15 18:01:42 +0200
commit28e60dbb83f76b18acade913dfdb029cd908c9b0 (patch)
treefc8191cf2feb2257a8ee5fe85b9d34a1dee4cfab /sound/core
parentd955dab33af4ebff0f6c486da216ebbf590eb7e4 (diff)
ALSA: memalloc: Initialize all fields of snd_dma_buffer properly
Some fields in snd_dma_buffer aren't touched in snd_dma_alloc_pages() and might be left uninitialized. Let's clear all fields properly, so that we can use a NULL check (e.g. dmab->private_data) as conditional in a later patch. Link: https://lore.kernel.org/r/20200615160045.2703-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/memalloc.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index bea46ed157a6..d8f28d030985 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -135,16 +135,17 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
dmab->dev.type = type;
dmab->dev.dev = device;
dmab->bytes = 0;
+ dmab->area = NULL;
+ dmab->addr = 0;
+ dmab->private_data = NULL;
switch (type) {
case SNDRV_DMA_TYPE_CONTINUOUS:
gfp = snd_mem_get_gfp_flags(device, GFP_KERNEL);
dmab->area = alloc_pages_exact(size, gfp);
- dmab->addr = 0;
break;
case SNDRV_DMA_TYPE_VMALLOC:
gfp = snd_mem_get_gfp_flags(device, GFP_KERNEL | __GFP_HIGHMEM);
dmab->area = __vmalloc(size, gfp);
- dmab->addr = 0;
break;
#ifdef CONFIG_HAS_DMA
#ifdef CONFIG_GENERIC_ALLOCATOR
@@ -171,8 +172,6 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
#endif
default:
pr_err("snd-malloc: invalid device type %d\n", type);
- dmab->area = NULL;
- dmab->addr = 0;
return -ENXIO;
}
if (! dmab->area)