linux-kernel - [PATCH 5.11 256/775] ASoC: qcom: Fix typo error in HDMI regmap config callbacks

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Message-Id: <20210301161214.285808997@linuxfoundation.org>
Date:   Mon,  1 Mar 2021 17:07:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 256/775] ASoC: qcom: Fix typo error in HDMI regmap config callbacks

From: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>

[ Upstream commit e681b1a6d706b4e54c3847bb822531b4660234f3 ]

Had a typo in lpass platform driver that resulted in crash
during suspend/resume with an HDMI dongle connected.

The regmap read/write/volatile regesters validation callbacks in lpass-cpu
were using MI2S rdma_channels count instead of hdmi_rdma_channels.

This typo error causing to read registers from the regmap beyond the length
of the mapping created by ioremap().

This fix avoids the need for reducing number hdmi_rdma_channels,
which is done in
commit 7dfe20ee92f6 ("ASoC: qcom: Fix number of HDMI RDMA channels on sc7180").
So reverting the same.

Fixes: 7cb37b7bd0d3c ("ASoC: qcom: Add support for lpass hdmi driver")
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Link: https://lore.kernel.org/r/20210202062727.22469-1-srivasam@codeaurora.org
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Tested-by: Stephen Boyd <swboyd@...omium.org>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/qcom/lpass-cpu.c    | 8 ++++----
 sound/soc/qcom/lpass-sc7180.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 73ca24c0a08b7..8e5415c9234f1 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -594,7 +594,7 @@ static bool lpass_hdmi_regmap_writeable(struct device *dev, unsigned int reg)
 			return true;
 	}
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACTL_REG(v, i))
 			return true;
 		if (reg == LPAIF_HDMI_RDMABASE_REG(v, i))
@@ -640,7 +640,7 @@ static bool lpass_hdmi_regmap_readable(struct device *dev, unsigned int reg)
 	if (reg == LPASS_HDMITX_APP_IRQSTAT_REG(v))
 		return true;
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACTL_REG(v, i))
 			return true;
 		if (reg == LPAIF_HDMI_RDMABASE_REG(v, i))
@@ -667,7 +667,7 @@ static bool lpass_hdmi_regmap_volatile(struct device *dev, unsigned int reg)
 	if (reg == LPASS_HDMI_TX_LEGACY_ADDR(v))
 		return true;
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACURR_REG(v, i))
 			return true;
 	}
@@ -817,7 +817,7 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 		}
 
 		lpass_hdmi_regmap_config.max_register = LPAIF_HDMI_RDMAPER_REG(variant,
-					variant->hdmi_rdma_channels);
+					variant->hdmi_rdma_channels - 1);
 		drvdata->hdmiif_map = devm_regmap_init_mmio(dev, drvdata->hdmiif,
 					&lpass_hdmi_regmap_config);
 		if (IS_ERR(drvdata->hdmiif_map)) {
diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
index 735c9dac28f26..8c168d3c589e9 100644
--- a/sound/soc/qcom/lpass-sc7180.c
+++ b/sound/soc/qcom/lpass-sc7180.c
@@ -171,7 +171,7 @@ static struct lpass_variant sc7180_data = {
 	.rdma_channels		= 5,
 	.hdmi_rdma_reg_base		= 0x64000,
 	.hdmi_rdma_reg_stride	= 0x1000,
-	.hdmi_rdma_channels		= 3,
+	.hdmi_rdma_channels		= 4,
 	.dmactl_audif_start	= 1,
 	.wrdma_reg_base		= 0x18000,
 	.wrdma_reg_stride	= 0x1000,
-- 
2.27.0