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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-03-12 10:30:29 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-03-12 10:34:58 +0100 |
| commit | 3fd16d70166194dd0bf0f7a555779a42ee267223 (patch) | |
| tree | 66af0ea76bbd0456cd8cd68027df6d30dde0ba5c /drivers | |
| parent | Merge tag 'acpi-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| download | linux-dev-3fd16d70166194dd0bf0f7a555779a42ee267223.tar.xz linux-dev-3fd16d70166194dd0bf0f7a555779a42ee267223.zip | |
ACPI: sysfs: Prevent get_status() from returning acpi_status
The return value of get_status() is passed to user space on errors,
so it should not return acpi_status values then. Make it return
error values that are meaningful for user space instead.
This also makes a Clang warning regarding the initialization of a
local variable in get_status() go away.
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/sysfs.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c index 41324f0b1bee..fa76f5e41b5c 100644 --- a/drivers/acpi/sysfs.c +++ b/drivers/acpi/sysfs.c @@ -648,26 +648,29 @@ static void acpi_global_event_handler(u32 event_type, acpi_handle device, } } -static int get_status(u32 index, acpi_event_status *status, +static int get_status(u32 index, acpi_event_status *ret, acpi_handle *handle) { - int result; + acpi_status status; if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) return -EINVAL; if (index < num_gpes) { - result = acpi_get_gpe_device(index, handle); - if (result) { + status = acpi_get_gpe_device(index, handle); + if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, "Invalid GPE 0x%x", index)); - return result; + return -ENXIO; } - result = acpi_get_gpe_status(*handle, index, status); - } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) - result = acpi_get_event_status(index - num_gpes, status); + status = acpi_get_gpe_status(*handle, index, ret); + } else { + status = acpi_get_event_status(index - num_gpes, ret); + } + if (ACPI_FAILURE(status)) + return -EIO; - return result; + return 0; } static ssize_t counter_show(struct kobject *kobj, |