From: jareer.h.abdel-qader <jareer.h.abdel-qader@xxxxxxxxx> 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@xxxxxxxxx> Reviewed by: Easwar Hariharan <easwar.hariharan@xxxxxxxxx> Signed-off-by: Jareer Abdel-Qader <jareer.h.abdel-qader@xxxxxxxxx> Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx> Signed-off-by: Jubin John <jubin.john@xxxxxxxxx> --- drivers/staging/rdma/hfi1/chip.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c index e489819..e1951f4 100644 --- a/drivers/staging/rdma/hfi1/chip.c +++ b/drivers/staging/rdma/hfi1/chip.c @@ -9455,7 +9455,7 @@ 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 */ @@ -10803,7 +10803,9 @@ 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, -- 1.7.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
