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* [PATCH] soc: ti: Fix NULL vs IS_ERR() checking in dma_init
@ 2021-12-12  7:13 Miaoqian Lin
  2021-12-13 15:59 ` Nishanth Menon
  0 siblings, 1 reply; 4+ messages in thread
From: Miaoqian Lin @ 2021-12-12  7:13 UTC (permalink / raw)
  Cc: linmq006, Nishanth Menon, Santosh Shilimkar, linux-kernel,
	linux-arm-kernel

Since devm_ioremap_resource() function return error pointers.
The pktdma_get_regs() function does not return NULL, It return error
pointers too. Using IS_ERR() to check the return value to fix this.

Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/soc/ti/knav_dma.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c
index 591d14ebcb11..9f82cf906949 100644
--- a/drivers/soc/ti/knav_dma.c
+++ b/drivers/soc/ti/knav_dma.c
@@ -646,31 +646,31 @@ static int dma_init(struct device_node *cloud, struct device_node *dma_node)
 	}
 
 	dma->reg_global	 = pktdma_get_regs(dma, node, 0, &size);
-	if (!dma->reg_global)
-		return -ENODEV;
+	if (IS_ERR(dma->reg_global))
+		return PTR_ERR(dma->reg_global);
 	if (size < sizeof(struct reg_global)) {
 		dev_err(kdev->dev, "bad size %pa for global regs\n", &size);
 		return -ENODEV;
 	}
 
 	dma->reg_tx_chan = pktdma_get_regs(dma, node, 1, &size);
-	if (!dma->reg_tx_chan)
-		return -ENODEV;
+	if (IS_ERR(dma->reg_tx_cha))
+		return PTR_ERR(dma->reg_tx_cha);
 
 	max_tx_chan = size / sizeof(struct reg_chan);
 	dma->reg_rx_chan = pktdma_get_regs(dma, node, 2, &size);
-	if (!dma->reg_rx_chan)
-		return -ENODEV;
+	if (IS_ERR(dma->reg_rx_chan))
+		return PTR_ERR(dma->reg_rx_chan);
 
 	max_rx_chan = size / sizeof(struct reg_chan);
 	dma->reg_tx_sched = pktdma_get_regs(dma, node, 3, &size);
-	if (!dma->reg_tx_sched)
-		return -ENODEV;
+	if (IS_ERR(dma->reg_tx_sched))
+		return PTR_ERR(dma->reg_tx_sched);
 
 	max_tx_sched = size / sizeof(struct reg_tx_sched);
 	dma->reg_rx_flow = pktdma_get_regs(dma, node, 4, &size);
-	if (!dma->reg_rx_flow)
-		return -ENODEV;
+	if (IS_ERR(dma->reg_rx_flow))
+		return PTR_ERR(dma->reg_rx_flow);
 
 	max_rx_flow = size / sizeof(struct reg_rx_flow);
 	dma->rx_priority = DMA_PRIO_DEFAULT;
-- 
2.17.1


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end of thread, other threads:[~2021-12-16 13:15 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-12-12  7:13 [PATCH] soc: ti: Fix NULL vs IS_ERR() checking in dma_init Miaoqian Lin
2021-12-13 15:59 ` Nishanth Menon
2021-12-14  1:55   ` [PATCH v2] " Miaoqian Lin
2021-12-16 12:46     ` Nishanth Menon

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