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i40e: retry VFLR handling if there is ongoing VF reset

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[ Upstream commit fb4e9239e029954a37a00818b21e837cebf2aa10 ]

When a VFLR interrupt is received during a VF reset initiated from a
different source, the VFLR may be not fully handled. This can
leave the VF in an undefined state.
To address this, set the I40E_VFLR_EVENT_PENDING bit again during VFLR
handling if the reset is not yet complete. This ensures the driver
will properly complete the VF reset in such scenarios.

Fixes: 52424f974b ("i40e: Fix VF hang when reset is triggered on another VF")
Signed-off-by: Robert Malz <robert.malz@canonical.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Robert Malz
2025-05-20 10:31:52 +02:00
committed by Greg Kroah-Hartman
parent dd184939f4
commit 987c3b8859
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
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@@ -4332,7 +4332,10 @@ int i40e_vc_process_vflr_event(struct i40e_pf *pf)
reg = rd32(hw, I40E_GLGEN_VFLRSTAT(reg_idx));
if (reg & BIT(bit_idx))
/* i40e_reset_vf will clear the bit in GLGEN_VFLRSTAT */
i40e_reset_vf(vf, true);
if (!i40e_reset_vf(vf, true)) {
/* At least one VF did not finish resetting, retry next time */
set_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
}
}
return 0;