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Subject: Re: [Intel-wired-lan] [PATCH] e1000e: disregard NVM checksum on tgp when valid checksum mask is not set X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 5/12/2025 8:25 PM, Vlad URSU wrote: > On 22.04.2025 10:43, Jacek Kowalski wrote: >> Some Dell Tiger Lake systems have incorrect NVM checksum. These also >> have a bitmask that indicates correct checksum set to "invalid". >> >> Because it is impossible to determine whether the NVM write would finish >> correctly or hang (see https://bugzilla.kernel.org/show_bug.cgi? >> id=213667) >> it makes sense to skip the validation completely under these conditions. >> >> Signed-off-by: Jacek Kowalski >> Fixes: 4051f68318ca9 ("e1000e: Do not take care about recovery NVM >> checksum") >> Cc: stable@vger.kernel.org >> --- >>   drivers/net/ethernet/intel/e1000e/ich8lan.c | 2 ++ >>   1 file changed, 2 insertions(+) >> >> diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/ >> net/ethernet/intel/e1000e/ich8lan.c >> index 364378133526..df4e7d781cb1 100644 >> --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c >> +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c >> @@ -4274,6 +4274,8 @@ static s32 >> e1000_validate_nvm_checksum_ich8lan(struct e1000_hw *hw) >>               ret_val = e1000e_update_nvm_checksum(hw); >>               if (ret_val) >>                   return ret_val; >> +        } else if (hw->mac.type == e1000_pch_tgp) { >> +            return 0; >>           } >>       } >> > > This patch doesn't work for me on an Optiplex 5090 Micro (i5-10500T). I > did some debugging and the platform is recognized as Tiger Lake, by the > driver, but the checksum valid bit is set even though the checksum is > not valid. > > The network controller works fine if I patch out the validation in > netdev.c. The checksum word at address 0x7e read using ethtool is 0xffff. > > I'm also a bit confused about why the driver reports the mac type as > e1000_pch_tgp even though i5-10500T should be Comet Lake? The device is being recognized by the device ID. Probably the device you have on your system is TGP. Since the checksum word is 0xFFFF which is peculiar, can you dump the whole NVM and share with us?