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platform/x86: wmi: Fix check for method instance number

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instance_count defines number of instances of data block and instance
itself is indexed from zero, which means first instance has number 0.
Therefore check for invalid instance should be non-strict inequality.

Signed-off-by: Pali Rohár <[email protected]>
Reviewed-by: Darren Hart (VMware) <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
This commit is contained in:
Pali Rohár 2017-08-12 09:44:18 +02:00 • committed by Andy Shevchenko
commit 6afa1e2a32
1 changed files with 3 additions and 3 deletions
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6
drivers/platform/x86/wmi.c
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@ -218,7 +218,7 @@ u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
if (!(block->flags & ACPI_WMI_METHOD))
return AE_BAD_DATA;
if (block->instance_count < instance)
if (block->instance_count <= instance)
return AE_BAD_PARAMETER;
input.count = 2;
@ -265,7 +265,7 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance,
block = &wblock->gblock;
handle = wblock->acpi_device->handle;
if (block->instance_count < instance)
if (block->instance_count <= instance)
return AE_BAD_PARAMETER;
/* Check GUID is a data block */
@ -392,7 +392,7 @@ acpi_status wmi_set_block(const char *guid_string, u8 instance,
block = &wblock->gblock;
handle = wblock->acpi_device->handle;
if (block->instance_count < instance)
if (block->instance_count <= instance)
return AE_BAD_PARAMETER;
/* Check GUID is a data block */