diff options
| author | Tom Rix <trix@redhat.com> | 2022-03-12 17:53:27 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2022-03-17 21:47:24 +0300 |
| commit | 6060a75e77fb05c9d54ed41cccc496dd98054b57 (patch) | |
| tree | a6518b60ccd49c2c7b037293a3ce673a13c894e5 /drivers/platform/x86/thinkpad_acpi.c | |
| parent | 286e937efbc7177c114e80aae9b402131e3886c1 (diff) | |
| download | linux-6060a75e77fb05c9d54ed41cccc496dd98054b57.tar.xz | |
platform/x86: thinkpad_acpi: consistently check fan_get_status return.
Clang static analysis returns this false positive
thinkpad_acpi.c:8926:19: warning: The left operand
of '!=' is a garbage value
(status != 0) ? "enabled" : "disabled", status);
~~~~~~ ^
The return of fan_get_status* is checked inconsistenly.
Sometime ret < 0 is an error, sometimes !ret.
Both fan_get_status() and fan_get_status_safe() return
0 on success and return negative otherwise. Change
the checks for error, ret < 0, into checks for
not success, !ret.
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220312145327.1398510-1-trix@redhat.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/thinkpad_acpi.c')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index c476a78599d6..515a592c9f02 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -8285,7 +8285,7 @@ static int fan_set_enable(void) case TPACPI_FAN_WR_ACPI_FANS: case TPACPI_FAN_WR_TPEC: rc = fan_get_status(&s); - if (rc < 0) + if (rc) break; /* Don't go out of emergency fan mode */ @@ -8304,7 +8304,7 @@ static int fan_set_enable(void) case TPACPI_FAN_WR_ACPI_SFAN: rc = fan_get_status(&s); - if (rc < 0) + if (rc) break; s &= 0x07; @@ -8843,7 +8843,7 @@ static void fan_suspend(void) /* Store fan status in cache */ fan_control_resume_level = 0; rc = fan_get_status_safe(&fan_control_resume_level); - if (rc < 0) + if (rc) pr_notice("failed to read fan level for later restore during resume: %d\n", rc); @@ -8864,7 +8864,7 @@ static void fan_resume(void) if (!fan_control_allowed || !fan_control_resume_level || - (fan_get_status_safe(¤t_level) < 0)) + fan_get_status_safe(¤t_level)) return; switch (fan_control_access_mode) { @@ -8918,7 +8918,7 @@ static int fan_read(struct seq_file *m) case TPACPI_FAN_RD_ACPI_GFAN: /* 570, 600e/x, 770e, 770x */ rc = fan_get_status_safe(&status); - if (rc < 0) + if (rc) return rc; seq_printf(m, "status:\t\t%s\n" @@ -8929,7 +8929,7 @@ static int fan_read(struct seq_file *m) case TPACPI_FAN_RD_TPEC: /* all except 570, 600e/x, 770e, 770x */ rc = fan_get_status_safe(&status); - if (rc < 0) + if (rc) return rc; seq_printf(m, "status:\t\t%s\n", |