[PATCH 08/20] staging: gasket: apex_clock_gating simplify logic, reduce indentation

From: Todd Poynor <toddpoynor@gmail.com>
To: Rob Springer <rspringer@google.com>,
	John Joseph <jnjoseph@google.com>,
	Ben Chan <benchan@chromium.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Zhongze Hu <frankhu@chromium.org>, Simon Que <sque@chromium.org>,
	Dmitry Torokhov <dtor@chromium.org>,
	Guenter Roeck <groeck@chromium.org>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	Todd Poynor <toddpoynor@google.com>
Subject: [PATCH 08/20] staging: gasket: apex_clock_gating simplify logic, reduce indentation
Date: Thu, 19 Jul 2018 20:49:08 -0700	[thread overview]
Message-ID: <20180720034920.77320-9-toddpoynor@gmail.com> (raw)
In-Reply-To: <20180720034920.77320-1-toddpoynor@gmail.com>

From: Todd Poynor <toddpoynor@google.com>

Collapse together two checks and return immediately, avoid conditional
indentation for most of function code.

Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
 drivers/staging/gasket/apex_driver.c | 43 +++++++++++++---------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/gasket/apex_driver.c b/drivers/staging/gasket/apex_driver.c
index 3a83c3d4d5561..a01b1f2b827ea 100644
--- a/drivers/staging/gasket/apex_driver.c
+++ b/drivers/staging/gasket/apex_driver.c
@@ -666,33 +666,30 @@ static long apex_clock_gating(struct gasket_dev *gasket_dev, ulong arg)
 {
 	struct apex_gate_clock_ioctl ibuf;
 
-	if (bypass_top_level)
+	if (bypass_top_level || !allow_sw_clock_gating)
 		return 0;
 
-	if (allow_sw_clock_gating) {
-		if (copy_from_user(&ibuf, (void __user *)arg, sizeof(ibuf)))
-			return -EFAULT;
+	if (copy_from_user(&ibuf, (void __user *)arg, sizeof(ibuf)))
+		return -EFAULT;
 
-		gasket_log_error(
-			gasket_dev, "%s %llu", __func__, ibuf.enable);
+	gasket_log_error(gasket_dev, "%s %llu", __func__, ibuf.enable);
 
-		if (ibuf.enable) {
-			/* Quiesce AXI, gate GCB clock. */
-			gasket_read_modify_write_32(
-				gasket_dev, APEX_BAR_INDEX,
-				APEX_BAR2_REG_AXI_QUIESCE, 0x1, 1, 16);
-			gasket_read_modify_write_32(
-				gasket_dev, APEX_BAR_INDEX,
-				APEX_BAR2_REG_GCB_CLOCK_GATE, 0x1, 2, 18);
-		} else {
-			/* Un-gate GCB clock, un-quiesce AXI. */
-			gasket_read_modify_write_32(
-				gasket_dev, APEX_BAR_INDEX,
-				APEX_BAR2_REG_GCB_CLOCK_GATE, 0x0, 2, 18);
-			gasket_read_modify_write_32(
-				gasket_dev, APEX_BAR_INDEX,
-				APEX_BAR2_REG_AXI_QUIESCE, 0x0, 1, 16);
-		}
+	if (ibuf.enable) {
+		/* Quiesce AXI, gate GCB clock. */
+		gasket_read_modify_write_32(
+		    gasket_dev, APEX_BAR_INDEX,
+		    APEX_BAR2_REG_AXI_QUIESCE, 0x1, 1, 16);
+		gasket_read_modify_write_32(
+		    gasket_dev, APEX_BAR_INDEX,
+		    APEX_BAR2_REG_GCB_CLOCK_GATE, 0x1, 2, 18);
+	} else {
+		/* Un-gate GCB clock, un-quiesce AXI. */
+		gasket_read_modify_write_32(
+		    gasket_dev, APEX_BAR_INDEX,
+		    APEX_BAR2_REG_GCB_CLOCK_GATE, 0x0, 2, 18);
+		gasket_read_modify_write_32(
+		    gasket_dev, APEX_BAR_INDEX,
+		    APEX_BAR2_REG_AXI_QUIESCE, 0x0, 1, 16);
 	}
 	return 0;
 }
-- 
2.18.0.233.g985f88cf7e-goog

