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830e0dd999
linux_dsm_epyc7002/drivers/net/ethernet/intel/i40e
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Jacob Keller 830e0dd999 i40e: avoid overflow in i40e_ptp_adjfreq() 
When operating at 1GbE, the base incval for the PTP clock is so large
that multiplying it by numbers close to the max_adj can overflow the
u64.

Rather than attempting to limit the max_adj to a value small enough to
avoid overflow, instead calculate the incvalue adjustment based on the
40GbE incvalue, and then multiply that by the scaling factor for the
link speed.

This sacrifices a small amount of precision in the adjustment but we
avoid erratic behavior of the clock due to the overflow caused if ppb is
very near the maximum adjustment.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-04-30 09:23:39 -07:00
..
i40e_adminq_cmd.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_adminq.c net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_adminq.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_alloc.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_client.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_client.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_common.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_dcb_nl.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_dcb.c i40e: fix reading LLDP configuration 2018-04-30 09:12:33 -07:00
i40e_dcb.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_debugfs.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_devids.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_diag.c net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_diag.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_ethtool.c i40e: Add advertising 10G LR mode 2018-04-30 09:16:58 -07:00
i40e_hmc.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_hmc.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_lan_hmc.c net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_lan_hmc.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_main.c i40e: Fix multiple issues with UDP tunnel offload filter configuration 2018-04-30 09:21:42 -07:00
i40e_nvm.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_osdep.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_prototype.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_ptp.c i40e: avoid overflow in i40e_ptp_adjfreq() 2018-04-30 09:23:39 -07:00
i40e_register.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_status.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_trace.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_txrx.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_txrx.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e_type.h i40e: fix reading LLDP configuration 2018-04-30 09:12:33 -07:00
i40e_virtchnl_pf.c i40e/i40evf: cleanup incorrect function doxygen comments 2018-04-30 09:09:04 -07:00
i40e_virtchnl_pf.h net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00
i40e.h i40e: avoid overflow in i40e_ptp_adjfreq() 2018-04-30 09:23:39 -07:00
Makefile net: intel: Cleanup the copyright/license headers 2018-04-27 14:00:04 -04:00