linux-kernel - [PATCH 6.6 220/638] soc: qcom: llcc: Check return value on Broadcast

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Date: Sun, 24 Mar 2024 18:54:17 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Unnathi Chalicheemala <quic_uchalich@...cinc.com>,
	Elliot Berman <quic_eberman@...cinc.com>,
	Mukesh Ojha <quic_mojha@...cinc.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.6 220/638] soc: qcom: llcc: Check return value on Broadcast_OR reg read

From: Unnathi Chalicheemala <quic_uchalich@...cinc.com>

[ Upstream commit ceeaddc19a90039861564d8e1078b778a8f95101 ]

Commit c72ca343f911 ("soc: qcom: llcc: Add v4.1 HW version support")
introduced a new 4.1 if statement in llcc_update_act_ctrl() without
considering that ret might be overwritten. So, add return value check
after Broadcast_OR register read in llcc_update_act_ctrl().

Fixes: c72ca343f911 ("soc: qcom: llcc: Add v4.1 HW version support")
Signed-off-by: Unnathi Chalicheemala <quic_uchalich@...cinc.com>
Reviewed-by: Elliot Berman <quic_eberman@...cinc.com>
Reviewed-by: Mukesh Ojha <quic_mojha@...cinc.com>
Link: https://lore.kernel.org/r/20240212183515.433873-1-quic_uchalich@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/qcom/llcc-qcom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index e877aace11555..03d5de759b256 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -610,6 +610,8 @@ static int llcc_update_act_ctrl(u32 sid,
 	ret = regmap_read_poll_timeout(drv_data->bcast_regmap, status_reg,
 				      slice_status, !(slice_status & status),
 				      0, LLCC_STATUS_READ_DELAY);
+	if (ret)
+		return ret;
 
 	if (drv_data->version >= LLCC_VERSION_4_1_0_0)
 		ret = regmap_write(drv_data->bcast_regmap, act_clear_reg,
-- 
2.43.0