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| author | James Morris <jmorris@namei.org> | 2010-05-06 02:56:07 +0200 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-05-06 02:56:07 +0200 |
| commit | 0ffbe2699cda6afbe08501098dff8a8c2fe6ae09 (patch) | |
| tree | 81b1a2305d16c873371b65c5a863c0268036cefe /sound/pci/mixart/mixart.c | |
| parent | TOMOYO: Use GFP_NOFS rather than GFP_KERNEL. (diff) | |
| parent | Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/air... (diff) | |
| download | linux-0ffbe2699cda6afbe08501098dff8a8c2fe6ae09.tar.xz linux-0ffbe2699cda6afbe08501098dff8a8c2fe6ae09.zip | |
Merge branch 'master' into next
Diffstat (limited to 'sound/pci/mixart/mixart.c')
| -rw-r--r-- | sound/pci/mixart/mixart.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c index 7e8e7da592a9..3be8f97c8bc0 100644 --- a/sound/pci/mixart/mixart.c +++ b/sound/pci/mixart/mixart.c @@ -27,6 +27,7 @@ #include <linux/dma-mapping.h> #include <linux/moduleparam.h> #include <linux/mutex.h> +#include <linux/slab.h> #include <sound/core.h> #include <sound/initval.h> @@ -1161,13 +1162,15 @@ static long snd_mixart_BA0_read(struct snd_info_entry *entry, void *file_private unsigned long count, unsigned long pos) { struct mixart_mgr *mgr = entry->private_data; + unsigned long maxsize; - count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ - if(count <= 0) + if (pos >= MIXART_BA0_SIZE) return 0; - if(pos + count > MIXART_BA0_SIZE) - count = (long)(MIXART_BA0_SIZE - pos); - if(copy_to_user_fromio(buf, MIXART_MEM( mgr, pos ), count)) + maxsize = MIXART_BA0_SIZE - pos; + if (count > maxsize) + count = maxsize; + count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ + if (copy_to_user_fromio(buf, MIXART_MEM(mgr, pos), count)) return -EFAULT; return count; } @@ -1180,13 +1183,15 @@ static long snd_mixart_BA1_read(struct snd_info_entry *entry, void *file_private unsigned long count, unsigned long pos) { struct mixart_mgr *mgr = entry->private_data; + unsigned long maxsize; - count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ - if(count <= 0) + if (pos > MIXART_BA1_SIZE) return 0; - if(pos + count > MIXART_BA1_SIZE) - count = (long)(MIXART_BA1_SIZE - pos); - if(copy_to_user_fromio(buf, MIXART_REG( mgr, pos ), count)) + maxsize = MIXART_BA1_SIZE - pos; + if (count > maxsize) + count = maxsize; + count = count & ~3; /* make sure the read size is a multiple of 4 bytes */ + if (copy_to_user_fromio(buf, MIXART_REG(mgr, pos), count)) return -EFAULT; return count; } |