down(&ctx->file->mutex); if (ctx->file != file) result = -EINVAL; else result = func(ctx->cm_id, private_data, cmd.len);  up(&ctx->file->mutex); ib_ucm_ctx_put(ctx); /* func reference */ done: 
static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,					const char __user *inbuf, int in_len,					int (*func)(struct ib_cm_id *cm_id,						    const void *private_data,						    u8 private_data_len)){	struct ib_ucm_private_data cmd;	struct ib_ucm_context *ctx;	const void *private_data = NULL;	int result;	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))		return -EFAULT;	result = ib_ucm_alloc_data(&private_data, cmd.data, cmd.len);	if (result)		return result;	ctx = ib_ucm_ctx_get(cmd.id);	if (!ctx) {		result = -ENOENT;		goto done;	} 	down(&ctx->file->mutex);	if (ctx->file != file)		result = -EINVAL;	else		result = func(ctx->cm_id, private_data, cmd.len);	up(&ctx->file->mutex);	ib_ucm_ctx_put(ctx); /* func reference */done:	kfree(private_data);	return result;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/b9ef520f9caf20aba8ac7cb2bbba45b52ff19d53/ucm.c/clean/drivers/infiniband/core/ucm.c