From: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
To: <hdegoede@redhat.com>, <markgross@kernel.org>
Cc: <platform-driver-x86@vger.kernel.org>, <Patil.Reddy@amd.com>,
"Shyam Sundar S K" <Shyam-sundar.S-k@amd.com>,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH] platform/x86/amd/pmf: Fix clang unused variable warning
Date: Fri, 19 Aug 2022 23:15:58 +0530 [thread overview]
Message-ID: <20220819174559.4029855-1-Shyam-sundar.S-k@amd.com> (raw)
variable 'mode' is used uninitialized whenever switch default is taken
in sps.c which leads to the following clang warning.
---
drivers/platform/x86/amd/pmf/sps.c:96:2: error: variable 'mode' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
default:
^~~~~~~
drivers/platform/x86/amd/pmf/sps.c:101:9: note: uninitialized use occurs here
return mode;
^~~~
drivers/platform/x86/amd/pmf/sps.c:84:9: note: initialize the variable 'mode' to silence this warning
u8 mode;
^
= '\0'
1 error generated.
---
Fix it by returning -EOPNOTSUPP in default case and also change the return
type of the function amd_pmf_get_pprof_modes() to keep it similar like
other drivers which implement platform_profile.
Fixes: 4c71ae414474 ("platform/x86/amd/pmf: Add support SPS PMF feature")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
---
drivers/platform/x86/amd/pmf/pmf.h | 2 +-
drivers/platform/x86/amd/pmf/sps.c | 11 +++++++----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 7613ed2ef6e3..172610f93bd1 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -303,7 +303,7 @@ int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev);
int amd_pmf_get_power_source(void);
/* SPS Layer */
-u8 amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf);
+int amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf);
void amd_pmf_update_slider(struct amd_pmf_dev *dev, bool op, int idx,
struct amd_pmf_static_slider_granular *table);
int amd_pmf_init_sps(struct amd_pmf_dev *dev);
diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
index 8923e29cc6ca..dba7e36962dc 100644
--- a/drivers/platform/x86/amd/pmf/sps.c
+++ b/drivers/platform/x86/amd/pmf/sps.c
@@ -79,9 +79,9 @@ static int amd_pmf_profile_get(struct platform_profile_handler *pprof,
return 0;
}
-u8 amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
+int amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
{
- u8 mode;
+ int mode;
switch (pmf->current_profile) {
case PLATFORM_PROFILE_PERFORMANCE:
@@ -95,7 +95,7 @@ u8 amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
break;
default:
dev_err(pmf->dev, "Unknown Platform Profile.\n");
- break;
+ return -EOPNOTSUPP;
}
return mode;
@@ -105,10 +105,13 @@ static int amd_pmf_profile_set(struct platform_profile_handler *pprof,
enum platform_profile_option profile)
{
struct amd_pmf_dev *pmf = container_of(pprof, struct amd_pmf_dev, pprof);
- u8 mode;
+ int mode;
pmf->current_profile = profile;
mode = amd_pmf_get_pprof_modes(pmf);
+ if (mode < 0)
+ return mode;
+
amd_pmf_update_slider(pmf, SLIDER_OP_SET, mode, NULL);
return 0;
}
--
2.25.1
next reply other threads:[~2022-08-19 18:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-19 17:45 Shyam Sundar S K [this message]
2022-08-19 21:46 ` [PATCH] platform/x86/amd/pmf: Fix clang unused variable warning Nathan Chancellor
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