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sony-laptop: Avoid oops on module unload for older laptops

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Older VAIO laptops without the SN00 ACPI method will have the "handles"
variable unset. Return early from sony_nc_function_cleanup when "handles"
is null.

Signed-off-by: Lawrence Yiu <lawyiu.dev@gmail.com>
Acked-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Lawrence Yiu 2016-03-21 01:44:22 -07:00 committed by Darren Hart
parent 775d054aba
commit ddd9357f60
1 changed files with 3 additions and 0 deletions
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3
drivers/platform/x86/sony-laptop.c
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@ -1446,6 +1446,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
{
unsigned int i, result, bitmask, handle;
if (!handles)
return;
/* get enabled events and disable them */
sony_nc_int_call(sony_nc_acpi_handle, "SN01", NULL, &bitmask);
sony_nc_int_call(sony_nc_acpi_handle, "SN03", &bitmask, &result);