Commit 4ef98989 authored Nov 06, 2015 by Jareer Abdel-Qader Committed by Greg Kroah-Hartman Nov 15, 2015

staging/rdma/hfi1: Disable thermal polling before sensor initialization



During driver load the thermal sensor needs to be reset prior
to initialization of the sensor. This prevents a possible sensor lock
up which can cause the wrong temperature value to be reported.
This fix leads to remove disabling thermal polling from
reset_asic_csrs() function.

Reviewed by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Jareer Abdel-Qader <jareer.h.abdel-qader@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 65fcf557

drivers/staging/rdma/hfi1/chip.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -9449,7 +9449,7 @@ static void reset_asic_csrs(struct hfi1_devdata *dd)
		/* We might want to retain this state across FLR if we ever use it */
		write_csr(dd, ASIC_CFG_DRV_STR, 0);

		write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0);
		/* ASIC_CFG_THERM_POLL_EN leave alone */
		/* ASIC_STS_THERM read-only */
		/* ASIC_CFG_RESET leave alone */

		@@ -10794,7 +10794,9 @@ static int thermal_init(struct hfi1_devdata *dd)

		acquire_hw_mutex(dd);
		dd_dev_info(dd, "Initializing thermal sensor\n");

		/* Disable polling of thermal readings */
		write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0x0);
		msleep(100);
		/* Thermal Sensor Initialization */
		/* Step 1: Reset the Thermal SBus Receiver */
		ret = sbus_request_slow(dd, SBUS_THERMAL, 0x0,