linux-kernel - [PATCH] intel tracing: consistency and off-by-one fix

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Message-ID: <20190724095841.GA6952@amd>
Date:   Wed, 24 Jul 2019 11:58:41 +0200
From:   Pavel Machek <pavel@....cz>
To:     alexander.shishkin@...ux.intel.com, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...l.org>
Subject: [PATCH] intel tracing: consistency and off-by-one fix


Consistently use "< ... +1" in for loops.

Fix of-by-one in for_each_set_bit().

Signed-off-by: Pavel Machek <pavel@...x.de>

diff --git a/drivers/hwtracing/intel_th/gth.c b/drivers/hwtracing/intel_th/gth.c
index fa9d34a..11bc89c 100644
--- a/drivers/hwtracing/intel_th/gth.c
+++ b/drivers/hwtracing/intel_th/gth.c
@@ -543,7 +543,7 @@ static void intel_th_gth_disable(struct intel_th_device *thdev,
 	output->active = false;
 
 	for_each_set_bit(master, gth->output[output->port].master,
-			 TH_CONFIGURABLE_MASTERS) {
+			 TH_CONFIGURABLE_MASTERS + 1) {
 		gth_master_set(gth, master, -1);
 	}
 	spin_unlock(&gth->gth_lock);
@@ -694,7 +694,7 @@ static void intel_th_gth_unassign(struct intel_th_device *thdev,
 	othdev->output.port = -1;
 	othdev->output.active = false;
 	gth->output[port].output = NULL;
-	for (master = 0; master <= TH_CONFIGURABLE_MASTERS; master++)
+	for (master = 0; master < TH_CONFIGURABLE_MASTERS + 1; master++)
 		if (gth->master[master] == port)
 			gth->master[master] = -1;
 	spin_unlock(&gth->gth_lock);

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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