diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/file.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/file.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c index b00653d69c01..505266a568d4 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -63,8 +63,8 @@ static ssize_t spufs_mem_read(struct file *file, char __user *buffer, size_t size, loff_t *pos) { - int ret; struct spu_context *ctx = file->private_data; + ssize_t ret; spu_acquire(ctx); ret = __spufs_mem_read(ctx, buffer, size, pos); @@ -74,25 +74,29 @@ spufs_mem_read(struct file *file, char __user *buffer, static ssize_t spufs_mem_write(struct file *file, const char __user *buffer, - size_t size, loff_t *pos) + size_t size, loff_t *ppos) { struct spu_context *ctx = file->private_data; char *local_store; + loff_t pos = *ppos; int ret; - size = min_t(ssize_t, LS_SIZE - *pos, size); - if (size <= 0) + if (pos < 0) + return -EINVAL; + if (pos > LS_SIZE) return -EFBIG; - *pos += size; + if (size > LS_SIZE - pos) + size = LS_SIZE - pos; spu_acquire(ctx); - local_store = ctx->ops->get_ls(ctx); - ret = copy_from_user(local_store + *pos - size, - buffer, size) ? -EFAULT : size; - + ret = copy_from_user(local_store + pos, buffer, size); spu_release(ctx); - return ret; + + if (ret) + return -EFAULT; + *ppos = pos + size; + return size; } static unsigned long spufs_mem_mmap_nopfn(struct vm_area_struct *vma, |