dsp: ion: avoid dma_buf_put twice when msm_audio_ion_map_buf fails

Update logic to avoid calling dma_buf_put twice
when msm_audio_ion_map_buf fails.

Change-Id: I6958ec55dc78f245e93fbaedf085873fe0f4cb93
Signed-off-by: Meng Wang <mengw@codeaurora.org>

dsp/msm_audio_ion_vm.c

@@ -582,17 +582,13 @@ int msm_audio_ion_alloc(struct dma_buf **dma_buf, size_t bufsz,
 	rc = msm_audio_ion_map_buf(*dma_buf, paddr, plen, vaddr);
 	if (rc) {
 		pr_err("%s: failed to map ION buf, rc = %d\n", __func__, rc);
-		goto err_dma_buf;
+		goto err;
 	}
 	pr_debug("%s: mapped address = %pK, size=%zd\n", __func__,
 		*vaddr, bufsz);
 
 	memset(*vaddr, 0, bufsz);
 
-	return rc;
-
-err_dma_buf:
-	dma_buf_put(*dma_buf);
 err:
 	return rc;
 }