From: Barnabás Pőcze Date: Sat, 4 Sep 2021 17:56:26 +0000 (+0000) Subject: platform/x86: wmi: do not fail if disabling fails X-Git-Tag: accepted/tizen/unified/20230118.172025~5869 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=36bd10013bdfbc34c35b6eac998323168d97f474;p=platform%2Fkernel%2Flinux-rpi.git platform/x86: wmi: do not fail if disabling fails [ Upstream commit 1975718c488a39128f1f515b23ae61a5a214cc3d ] Previously, `__query_block()` would fail if the second WCxx method call failed. However, the WQxx method might have succeeded, and potentially allocated memory for the result. Instead of throwing away the result and potentially leaking memory, ignore the result of the second WCxx call. Signed-off-by: Barnabás Pőcze Link: https://lore.kernel.org/r/20210904175450.156801-25-pobrn@protonmail.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Signed-off-by: Sasha Levin --- diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index a763130..1b65bb6 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -353,7 +353,14 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance, * the WQxx method failed - we should disable collection anyway. */ if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) { - status = acpi_execute_simple_method(handle, wc_method, 0); + /* + * Ignore whether this WCxx call succeeds or not since + * the previously executed WQxx method call might have + * succeeded, and returning the failing status code + * of this call would throw away the result of the WQxx + * call, potentially leaking memory. + */ + acpi_execute_simple_method(handle, wc_method, 0); } return status;