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usb: core: Make use of acpi_evaluate_object() status 

Compiler is not happy about dangling variable:

.../core/usb-acpi.c: In function ‘usb_acpi_get_connect_type’:
.../core/usb-acpi.c:90:14: warning: variable ‘status’ set but not used [-Wunused-but-set-variable]
   90 |  acpi_status status;
      |              ^~~~~~

Make use of it by checking the status and bail out in case of error.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200218185207.62527-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2020-02-18 20:52:07 +02:00 committed by Greg Kroah-Hartman
parent 10892847de
commit 24f772409b
1 changed files with 6 additions and 5 deletions
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11
drivers/usb/core/usb-acpi.c
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@ -86,7 +86,7 @@ static enum usb_port_connect_type usb_acpi_get_connect_type(acpi_handle handle,
{
enum usb_port_connect_type connect_type = USB_PORT_CONNECT_TYPE_UNKNOWN;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *upc;
union acpi_object *upc = NULL;
acpi_status status;
/*
@ -98,11 +98,12 @@ static enum usb_port_connect_type usb_acpi_get_connect_type(acpi_handle handle,
* no connectable, the port would be not used.
*/
status = acpi_evaluate_object(handle, "_UPC", NULL, &buffer);
upc = buffer.pointer;
if (!upc || (upc->type != ACPI_TYPE_PACKAGE)
|| upc->package.count != 4) {
if (ACPI_FAILURE(status))
goto out;
upc = buffer.pointer;
if (!upc || (upc->type != ACPI_TYPE_PACKAGE) || upc->package.count != 4)
goto out;
}
if (upc->package.elements[0].integer.value)
if (pld->user_visible)