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When uCode detects critical temperature it should send "card state notification" interrupt to driver and then shut itself down to prevent overheating. There is a race condition where uCode shuts down before it can deliver the interrupt to driver. Additional method provided here for driver to enter CT_KILL state based on temperature reading. How it works: Method 1: If driver receive "card state notification" interrupt from uCode; it enters "CT_KILL" state immediately Method 2: If the last temperature report by Card reach Critical temperature, driver will send "statistic notification" request to uCode to verify the temperature reading, if driver can not get reply from uCode within 300ms, driver will enter CT_KILL state automatically. Method 3: If the last temperature report by Card did not reach Critical temperature, but uCode already shut down due to critical temperature. All the host commands send to uCode will not get process by uCode; when command queue reach the limit, driver will check the last reported temperature reading, if it is within pre-defined margin, enter "CT_KILL" state immediately. In this case, when uCode ready to exit from "CT_KILL" state, driver need to restart the adapter in order to reset all the queues and resume normal operation. One additional issue being address here, when system is in CT_KILL state, both tx and rx already stopped, but driver still can send host command to uCode, it will flood the command queue since card was not responding; adding STATUS_CT_KILL flag to reject enqueue host commands to uCode if it is in CT_KILL state, when uCode is ready to come out of CT_KILL, driver will clear the STATUS_CT_KILL bit and allow enqueue the host commands to uCode to recover from CT_KILL state. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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| .. | ||
| iwl-1000.c | ||
| iwl-3945-fh.h | ||
| iwl-3945-hw.h | ||
| iwl-3945-led.c | ||
| iwl-3945-led.h | ||
| iwl-3945-rs.c | ||
| iwl-3945.c | ||
| iwl-3945.h | ||
| iwl-4965-hw.h | ||
| iwl-4965.c | ||
| iwl-5000-hw.h | ||
| iwl-5000.c | ||
| iwl-6000-hw.h | ||
| iwl-6000.c | ||
| iwl-agn-rs.c | ||
| iwl-agn-rs.h | ||
| iwl-agn.c | ||
| iwl-calib.c | ||
| iwl-calib.h | ||
| iwl-commands.h | ||
| iwl-core.c | ||
| iwl-core.h | ||
| iwl-csr.h | ||
| iwl-debug.h | ||
| iwl-debugfs.c | ||
| iwl-dev.h | ||
| iwl-eeprom.c | ||
| iwl-eeprom.h | ||
| iwl-fh.h | ||
| iwl-hcmd.c | ||
| iwl-helpers.h | ||
| iwl-io.h | ||
| iwl-led.c | ||
| iwl-led.h | ||
| iwl-power.c | ||
| iwl-power.h | ||
| iwl-prph.h | ||
| iwl-rx.c | ||
| iwl-scan.c | ||
| iwl-spectrum.c | ||
| iwl-spectrum.h | ||
| iwl-sta.c | ||
| iwl-sta.h | ||
| iwl-tx.c | ||
| iwl3945-base.c | ||
| Kconfig | ||
| Makefile | ||