UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

igc: Do not enable crosstimestamping for i225-V models 

It was reported that when PCIe PTM is enabled, some lockups could
be observed with some integrated i225-V models.

While the issue is investigated, we can disable crosstimestamp for
those models and see no loss of functionality, because those models
don't have any support for time synchronization.

Fixes: a90ec84837 ("igc: Add support for PTP getcrosststamp()")
Link: https://lore.kernel.org/all/924175a188159f4e03bd69908a91e606b574139b.camel@gmx.de/
Reported-by: Stefan Dietrich <roots@gmx.de>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Nechama Kraus <nechamax.kraus@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Vinicius Costa Gomes 2021-12-13 16:39:49 -08:00 committed by Tony Nguyen
parent 16fa29aef7
commit 1e81dcc1ab
1 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/ethernet/intel/igc/igc_ptp.c
View File

@ -768,7 +768,20 @@ int igc_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr)
*/
static bool igc_is_crosststamp_supported(struct igc_adapter *adapter)
{
return IS_ENABLED(CONFIG_X86_TSC) ? pcie_ptm_enabled(adapter->pdev) : false;
if (!IS_ENABLED(CONFIG_X86_TSC))
return false;
/* FIXME: it was noticed that enabling support for PCIe PTM in
* some i225-V models could cause lockups when bringing the
* interface up/down. There should be no downsides to
* disabling crosstimestamping support for i225-V, as it
* doesn't have any PTP support. That way we gain some time
* while root causing the issue.
*/
if (adapter->pdev->device == IGC_DEV_ID_I225_V)
return false;
return pcie_ptm_enabled(adapter->pdev);
}
static struct system_counterval_t igc_device_tstamp_to_system(u64 tstamp)