From: Colin King <colin.king@canonical.com>
To: Zhang Rui <rui.zhang@intel.com>,
Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
linux-pm@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][V2] drivers: thermal: processor_thermal_device: fix missing bitwise-or operators
Date: Mon, 29 Jul 2019 13:03:23 +0100 [thread overview]
Message-ID: <20190729120323.15838-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
The variable val is having the top 8 bits cleared and then the variable is being
re-assinged and setting just the top 8 bits. I believe the intention was bitwise-or
in the top 8 bits. Fix this by replacing the = operators with &= and |= instead.
Addresses-Coverity: ("Unused value")
Fixes: b0c74b08517e ("drivers: thermal: processor_thermal_device: Export sysfs inteface for TCC offset")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
V2: Add in &= operator missing from V1. Doh.
---
.../thermal/intel/int340x_thermal/processor_thermal_device.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
index 6f6ac6a8e82d..97333fc4be42 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
@@ -163,8 +163,8 @@ static int tcc_offset_update(int tcc)
if (err)
return err;
- val = ~GENMASK_ULL(31, 24);
- val = (tcc & 0xff) << 24;
+ val &= ~GENMASK_ULL(31, 24);
+ val |= (tcc & 0xff) << 24;
err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
if (err)
--
2.20.1
next reply other threads:[~2019-07-29 12:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 12:03 Colin King [this message]
2019-07-29 12:34 ` [PATCH][V2] drivers: thermal: processor_thermal_device: fix missing bitwise-or operators walter harms
2019-07-29 21:09 ` Srinivas Pandruvada
2019-08-19 6:32 ` Zhang Rui
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