iavf: Fix for the false positive ASQ/ARQ errors while issuing VF reset

[ Upstream commit 321421b57a12e933f92b228e0e6d0b2c6541f41d ]

While issuing VF Reset from the guest OS, the VF driver prints
logs about critical / Overflow error detection. This is not an
actual error since the VF_MBX_ARQLEN register is set to all FF's
for a short period of time and the VF would catch the bits set if
it was reading the register during that spike of time.
This patch introduces an additional check to ignore this condition
since the VF is in reset.

Fixes: 19b73d8efaa4 ("i40evf: Add additional check for reset")
Signed-off-by: Surabhi Boob <surabhi.boob@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 90a9379b4e467035acaf7f308a09604f3e4409ca..643679cad8657ca31c27542f6982229bb33740f6 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -2329,7 +2329,7 @@ static void iavf_adminq_task(struct work_struct *work)
 
        /* check for error indications */
        val = rd32(hw, hw->aq.arq.len);
-       if (val == 0xdeadbeef) /* indicates device in reset */
+       if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */
                goto freedom;
        oldval = val;
        if (val & IAVF_VF_ARQLEN1_ARQVFE_MASK) {