diff options
| -rw-r--r-- | drivers/acpi/acpica/aclocal.h | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/dscontrol.c | 16 | ||||
| -rw-r--r-- | drivers/acpi/acpica/utinit.c | 1 | ||||
| -rw-r--r-- | include/acpi/acconfig.h | 4 | ||||
| -rw-r--r-- | include/acpi/acpixf.h | 4 | ||||
| -rw-r--r-- | include/acpi/actypes.h | 2 |
6 files changed, 16 insertions, 13 deletions
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h index 0d45b8bb1678..bed041d41596 100644 --- a/drivers/acpi/acpica/aclocal.h +++ b/drivers/acpi/acpica/aclocal.h @@ -622,7 +622,7 @@ struct acpi_control_state { union acpi_parse_object *predicate_op; u8 *aml_predicate_start; /* Start of if/while predicate */ u8 *package_end; /* End of if/while block */ - u32 loop_count; /* While() loop counter */ + u64 loop_timeout; /* While() loop timeout */ }; /* diff --git a/drivers/acpi/acpica/dscontrol.c b/drivers/acpi/acpica/dscontrol.c index f470e81b0499..244075dbc03a 100644 --- a/drivers/acpi/acpica/dscontrol.c +++ b/drivers/acpi/acpica/dscontrol.c @@ -118,6 +118,8 @@ acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, control_state->control.package_end = walk_state->parser_state.pkg_end; control_state->control.opcode = op->common.aml_opcode; + control_state->control.loop_timeout = acpi_os_get_timer() + + (u64)(acpi_gbl_max_loop_iterations * ACPI_100NSEC_PER_SEC); /* Push the control state on this walk's control stack */ @@ -206,14 +208,14 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state *walk_state, /* Predicate was true, the body of the loop was just executed */ /* - * This loop counter mechanism allows the interpreter to escape - * possibly infinite loops. This can occur in poorly written AML - * when the hardware does not respond within a while loop and the - * loop does not implement a timeout. + * This infinite loop detection mechanism allows the interpreter + * to escape possibly infinite loops. This can occur in poorly + * written AML when the hardware does not respond within a while + * loop and the loop does not implement a timeout. */ - control_state->control.loop_count++; - if (control_state->control.loop_count > - acpi_gbl_max_loop_iterations) { + if (ACPI_TIME_AFTER(acpi_os_get_timer(), + control_state->control. + loop_timeout)) { status = AE_AML_INFINITE_LOOP; break; } diff --git a/drivers/acpi/acpica/utinit.c b/drivers/acpi/acpica/utinit.c index 23e766d1691d..45eeb0dcf283 100644 --- a/drivers/acpi/acpica/utinit.c +++ b/drivers/acpi/acpica/utinit.c @@ -206,7 +206,6 @@ acpi_status acpi_ut_init_globals(void) acpi_gbl_next_owner_id_offset = 0; acpi_gbl_debugger_configuration = DEBUGGER_THREADING; acpi_gbl_osi_mutex = NULL; - acpi_gbl_max_loop_iterations = ACPI_MAX_LOOP_COUNT; /* Hardware oriented */ diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h index 6db3b4668b1a..ffe364fa4040 100644 --- a/include/acpi/acconfig.h +++ b/include/acpi/acconfig.h @@ -145,9 +145,9 @@ #define ACPI_ADDRESS_RANGE_MAX 2 -/* Maximum number of While() loops before abort */ +/* Maximum time (default 30s) of While() loops before abort */ -#define ACPI_MAX_LOOP_COUNT 0x000FFFFF +#define ACPI_MAX_LOOP_TIMEOUT 30 /****************************************************************************** * diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index e1dd1a8d42b6..1a4322db0274 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -260,11 +260,11 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_osi_data, 0); ACPI_INIT_GLOBAL(u8, acpi_gbl_reduced_hardware, FALSE); /* - * Maximum number of While() loop iterations before forced method abort. + * Maximum timeout for While() loop iterations before forced method abort. * This mechanism is intended to prevent infinite loops during interpreter * execution within a host kernel. */ -ACPI_INIT_GLOBAL(u32, acpi_gbl_max_loop_iterations, ACPI_MAX_LOOP_COUNT); +ACPI_INIT_GLOBAL(u32, acpi_gbl_max_loop_iterations, ACPI_MAX_LOOP_TIMEOUT); /* * This mechanism is used to trace a specified AML method. The method is diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 4f077edb9b81..ddde2790a54a 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -468,6 +468,8 @@ typedef void *acpi_handle; /* Actually a ptr to a NS Node */ #define ACPI_NSEC_PER_MSEC 1000000L #define ACPI_NSEC_PER_SEC 1000000000L +#define ACPI_TIME_AFTER(a, b) ((s64)((b) - (a)) < 0) + /* Owner IDs are used to track namespace nodes for selective deletion */ typedef u8 acpi_owner_id; |