diff --git a/arch/arm/mach-ux500/devices-db8500.c b/arch/arm/mach-ux500/devices-db8500.c
index 7989c564e47a..130f3d9917e7 100644
--- a/arch/arm/mach-ux500/devices-db8500.c
+++ b/arch/arm/mach-ux500/devices-db8500.c
@@ -121,7 +121,6 @@ static const dma_addr_t dma40_rx_map[DB8500_DMA_NR_DEV] = {
 };
 
 static struct stedma40_platform_data dma40_plat_data = {
-	.dev_len = DB8500_DMA_NR_DEV,
 	.dev_rx = dma40_rx_map,
 	.dev_tx = dma40_tx_map,
 	.disabled_channels = {-1},
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 367ef15a3cd8..f25c9ccf28e8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -45,6 +45,9 @@
 #define D40_LCLA_LINK_PER_EVENT_GRP 128
 #define D40_LCLA_END D40_LCLA_LINK_PER_EVENT_GRP
 
+/* Max number of logical channels per physical channel */
+#define D40_MAX_LOG_CHAN_PER_PHY 32
+
 /* Attempts before giving up to trying to get pages that are aligned */
 #define MAX_LCLA_ALLOC_ATTEMPTS 256
 
@@ -3210,6 +3213,8 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
 	else
 		num_phy_chans = 4 * (readl(virtbase + D40_DREG_ICFG) & 0x7) + 4;
 
+	num_log_chans = num_phy_chans * D40_MAX_LOG_CHAN_PER_PHY;
+
 	dev_info(&pdev->dev, "hardware revision: %d @ 0x%x with %d physical channels\n",
 		 rev, res->start, num_phy_chans);
 
@@ -3219,15 +3224,6 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
 		goto failure;
 	}
 
-	/* Count the number of logical channels in use */
-	for (i = 0; i < plat_data->dev_len; i++)
-		if (plat_data->dev_rx[i] != 0)
-			num_log_chans++;
-
-	for (i = 0; i < plat_data->dev_len; i++)
-		if (plat_data->dev_tx[i] != 0)
-			num_log_chans++;
-
 	base = kzalloc(ALIGN(sizeof(struct d40_base), 4) +
 		       (num_phy_chans + num_log_chans + ARRAY_SIZE(dma40_memcpy_channels)) *
 		       sizeof(struct d40_chan), GFP_KERNEL);
@@ -3295,7 +3291,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
 		 * The max number of logical channels are event lines for all
 		 * src devices and dst devices
 		 */
-		base->lookup_log_chans = kzalloc(plat_data->dev_len * 2 *
+		base->lookup_log_chans = kzalloc(num_log_chans *
 						 sizeof(struct d40_chan *),
 						 GFP_KERNEL);
 		if (!base->lookup_log_chans)
diff --git a/include/linux/platform_data/dma-ste-dma40.h b/include/linux/platform_data/dma-ste-dma40.h
index 9e42a67d0cd5..c54af61c9e48 100644
--- a/include/linux/platform_data/dma-ste-dma40.h
+++ b/include/linux/platform_data/dma-ste-dma40.h
@@ -136,7 +136,6 @@ struct stedma40_chan_cfg {
 /**
  * struct stedma40_platform_data - Configuration struct for the dma device.
  *
- * @dev_len: length of dev_tx and dev_rx
  * @dev_tx: mapping between destination event line and io address
  * @dev_rx: mapping between source event line and io address
  * @disabled_channels: A vector, ending with -1, that marks physical channels
@@ -153,7 +152,6 @@ struct stedma40_chan_cfg {
  * for 'multiple of 4' channels, like 8.
  */
 struct stedma40_platform_data {
-	u32				 dev_len;
 	const dma_addr_t		*dev_tx;
 	const dma_addr_t		*dev_rx;
 	int				 disabled_channels[STEDMA40_MAX_PHYS];