From c47e6403fa099f200868d6b106701cb42d181d2b Mon Sep 17 00:00:00 2001
From: Tudor Ambarus <tudor.ambarus@microchip.com>
Date: Tue, 25 Oct 2022 12:02:49 +0300
Subject: [PATCH] dmaengine: at_hdmac: Check return code of dma_async_device_register
Git-commit: c47e6403fa099f200868d6b106701cb42d181d2b
Patch-mainline: v6.1-rc5
References: git-fixes

dma_async_device_register() can fail, check the return code and display an
error.

Fixes: dc78baa2b90b ("dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Cc: stable@vger.kernel.org
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20221025090306.297886-1-tudor.ambarus@microchip.com
Link: https://lore.kernel.org/r/20221025090306.297886-16-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/dma/at_hdmac.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index afcbad3e1718..858bd64f1313 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1928,7 +1928,11 @@ static int __init at_dma_probe(struct platform_device *pdev)
 	  dma_has_cap(DMA_SLAVE, atdma->dma_common.cap_mask)  ? "slave " : "",
 	  plat_dat->nr_channels);
 
-	dma_async_device_register(&atdma->dma_common);
+	err = dma_async_device_register(&atdma->dma_common);
+	if (err) {
+		dev_err(&pdev->dev, "Unable to register: %d.\n", err);
+		goto err_dma_async_device_register;
+	}
 
 	/*
 	 * Do not return an error if the dmac node is not present in order to
@@ -1948,6 +1952,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
 
 err_of_dma_controller_register:
 	dma_async_device_unregister(&atdma->dma_common);
+err_dma_async_device_register:
 	dma_pool_destroy(atdma->memset_pool);
 err_memset_pool_create:
 	dma_pool_destroy(atdma->dma_desc_pool);
-- 
2.35.3