diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h
index 2c0a969adc9f..35987a35a848 100644
--- a/drivers/dma/sh/shdma.h
+++ b/drivers/dma/sh/shdma.h
@@ -29,7 +29,7 @@ struct sh_dmae_chan {
 	const struct sh_dmae_slave_config *config; /* Slave DMA configuration */
 	int xmit_shift;			/* log_2(bytes_per_xfer) */
 	void __iomem *base;
-	char dev_id[16];		/* unique name per DMAC of channel */
+	char dev_id[32];		/* unique name per DMAC of channel */
 	int pm_error;
 	dma_addr_t slave_addr;
 };