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
WARNING: multiple messages have this Message-ID (diff)
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 12:03:23 +0000 [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: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-29 12:03 Colin King [this message] 2019-07-29 12:03 ` [PATCH][V2] drivers: thermal: processor_thermal_device: fix missing bitwise-or operators Colin King 2019-07-29 12:34 ` walter harms 2019-07-29 12:34 ` walter harms 2019-07-29 21:09 ` Srinivas Pandruvada 2019-07-29 21:09 ` Srinivas Pandruvada 2019-08-19 6:32 ` Zhang Rui 2019-08-19 6:32 ` Zhang Rui
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