From: Yazen Ghannam Date: Mon, 28 Aug 2017 18:13:14 +0000 (-0500) Subject: ACPI, APEI, EINJ: Subtract any matching Register Region from Trigger resources X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1d5d820b8fe83b5f859d1ebb028a09ada426447e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git ACPI, APEI, EINJ: Subtract any matching Register Region from Trigger resources ACPI defines a number of instructions to use for triggering errors. However we are currently removing the address resources from the trigger resources for only the WRITE_REGISTER_VALUE instruction. This leads to a resource conflict for any other valid instruction. Check that the instruction is less than or equal to the WRITE_REGISTER_VALUE instruction. This allows all valid memory access instructions and protects against invalid instructions. Fixes: b4e008dc53a3 (ACPI, APEI, EINJ, Refine the fix of resource conflict) Signed-off-by: Yazen Ghannam Acked-by: Tony Luck Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c index ec50c32ea3da..b38737c83a24 100644 --- a/drivers/acpi/apei/einj.c +++ b/drivers/acpi/apei/einj.c @@ -281,7 +281,7 @@ static struct acpi_generic_address *einj_get_trigger_parameter_region( ((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); for (i = 0; i < trigger_tab->entry_count; i++) { if (entry->action == ACPI_EINJ_TRIGGER_ERROR && - entry->instruction == ACPI_EINJ_WRITE_REGISTER_VALUE && + entry->instruction <= ACPI_EINJ_WRITE_REGISTER_VALUE && entry->register_region.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY && (entry->register_region.address & param2) == (param1 & param2))