linux-kernel - [PATCH 5.17 499/772] ASoC: sh: rz-ssi: Release the DMA channels in rz_ssi

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Message-Id: <20220607165003.686169970@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:01:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Machek <pavel@...x.de>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 499/772] ASoC: sh: rz-ssi: Release the DMA channels in rz_ssi_probe() error path

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

[ Upstream commit 767e6f26204d3f5406630e86b720d01818b8616d ]

DMA channels requested by rz_ssi_dma_request() in rz_ssi_probe() were
never released in the error path apart from one place. This patch fixes
this issue by calling rz_ssi_release_dma_channels() in the error path.

Fixes: 26ac471c5354 ("ASoC: sh: rz-ssi: Add SSI DMAC support")
Reported-by: Pavel Machek <pavel@...x.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Link: https://lore.kernel.org/r/20220426074922.13319-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/sh/rz-ssi.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index 3b55444a1b58..6d794eaaf4c3 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -982,14 +982,18 @@ static int rz_ssi_probe(struct platform_device *pdev)
 
 	/* Error Interrupt */
 	ssi->irq_int = platform_get_irq_byname(pdev, "int_req");
-	if (ssi->irq_int < 0)
+	if (ssi->irq_int < 0) {
+		rz_ssi_release_dma_channels(ssi);
 		return ssi->irq_int;
+	}
 
 	ret = devm_request_irq(&pdev->dev, ssi->irq_int, &rz_ssi_interrupt,
 			       0, dev_name(&pdev->dev), ssi);
-	if (ret < 0)
+	if (ret < 0) {
+		rz_ssi_release_dma_channels(ssi);
 		return dev_err_probe(&pdev->dev, ret,
 				     "irq request error (int_req)\n");
+	}
 
 	if (!rz_ssi_is_dma_enabled(ssi)) {
 		/* Tx and Rx interrupts (pio only) */
@@ -1017,13 +1021,16 @@ static int rz_ssi_probe(struct platform_device *pdev)
 	}
 
 	ssi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
-	if (IS_ERR(ssi->rstc))
+	if (IS_ERR(ssi->rstc)) {
+		rz_ssi_release_dma_channels(ssi);
 		return PTR_ERR(ssi->rstc);
+	}
 
 	reset_control_deassert(ssi->rstc);
 	pm_runtime_enable(&pdev->dev);
 	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
+		rz_ssi_release_dma_channels(ssi);
 		pm_runtime_disable(ssi->dev);
 		reset_control_assert(ssi->rstc);
 		return dev_err_probe(ssi->dev, ret, "pm_runtime_resume_and_get failed\n");
-- 
2.35.1