linux-kernel - [PATCH v3 4/6] phy: rockchip-pcie: Refactor mutex handling in rockchip_pcie_phy_power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241012071919.3726-5-linux.amoon@gmail.com>
Date: Sat, 12 Oct 2024 12:49:06 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	linux-phy@...ts.infradead.org (open list:GENERIC PHY FRAMEWORK),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Rockchip SoC support),
	linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support),
	linux-kernel@...r.kernel.org (open list)
Cc: Anand Moon <linux.amoon@...il.com>,
	Dan Carpenter <dan.carpenter@...aro.org>
Subject: [PATCH v3 4/6] phy: rockchip-pcie: Refactor mutex handling in rockchip_pcie_phy_power_off()

Refactor the mutex handling in the rockchip_pcie_phy_power_off() function
to improve code readability and maintainability. The goto statement has
been removed, and the mutex_unlock call is now directly within the
conditional block.

Return the result of reset_control_assert() function, with 0 indicating
success and an error code indicating failure

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v3: New patch.
---
 drivers/phy/rockchip/phy-rockchip-pcie.c | 26 +++++++++++-------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-pcie.c b/drivers/phy/rockchip/phy-rockchip-pcie.c
index e60f24b0b363..c84a3c209315 100644
--- a/drivers/phy/rockchip/phy-rockchip-pcie.c
+++ b/drivers/phy/rockchip/phy-rockchip-pcie.c
@@ -132,26 +132,24 @@ static int rockchip_pcie_phy_power_off(struct phy *phy)
 				   PHY_LANE_IDLE_MASK,
 				   PHY_LANE_IDLE_A_SHIFT + inst->index));
 
-	if (--rk_phy->pwr_cnt)
-		goto err_out;
+	if (--rk_phy->pwr_cnt) {
+		mutex_unlock(&rk_phy->pcie_mutex);
+		return 0;
+	}
 
 	err = reset_control_assert(rk_phy->phy_rst);
 	if (err) {
 		dev_err(&phy->dev, "assert phy_rst err %d\n", err);
-		goto err_restore;
+		rk_phy->pwr_cnt++;
+		regmap_write(rk_phy->reg_base,
+			     rk_phy->phy_data->pcie_laneoff,
+			     HIWORD_UPDATE(!PHY_LANE_IDLE_OFF,
+					   PHY_LANE_IDLE_MASK,
+					   PHY_LANE_IDLE_A_SHIFT + inst->index));
+		mutex_unlock(&rk_phy->pcie_mutex);
+		return err;
 	}
 
-err_out:
-	mutex_unlock(&rk_phy->pcie_mutex);
-	return 0;
-
-err_restore:
-	rk_phy->pwr_cnt++;
-	regmap_write(rk_phy->reg_base,
-		     rk_phy->phy_data->pcie_laneoff,
-		     HIWORD_UPDATE(!PHY_LANE_IDLE_OFF,
-				   PHY_LANE_IDLE_MASK,
-				   PHY_LANE_IDLE_A_SHIFT + inst->index));
 	mutex_unlock(&rk_phy->pcie_mutex);
 	return err;
 }
-- 
2.44.0