netdev - [PATCH iwl-net v3] i40e: fix hot issue NVM content is corrupted after nvmupdate

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Message-Id: <20240612110402.3356700-1-aleksandr.loktionov@intel.com>
Date: Wed, 12 Jun 2024 13:04:02 +0200
From: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
To: intel-wired-lan@...ts.osuosl.org,
	anthony.l.nguyen@...el.com,
	aleksandr.loktionov@...el.com
Cc: netdev@...r.kernel.org,
	Kelvin Kang <kelvin.kang@...el.com>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Subject: [PATCH iwl-net v3] i40e: fix hot issue NVM content is corrupted after nvmupdate

The bug affects users only at the time when they try to update NVM, and
only F/W versions that generate errors while nvmupdate. For example X710DA2
with 0x8000ECB7 F/W is affected, but there are probably more...

After 230f3d53a547 patch, which should only replace F/W specific error codes
with Linux kernel generic, all EIO errors started to be converted into EAGAIN
which leads nvmupdate to retry until it timeouts and sometimes fails after
more than 20 minutes in the middle of NVM update, so NVM becomes corrupted.

Remove wrong EIO to EGAIN conversion and pass all errors as is.

Fixes: 230f3d53a547 ("i40e: remove i40e_status")
Co-developed-by: Kelvin Kang <kelvin.kang@...el.com>
Signed-off-by: Kelvin Kang <kelvin.kang@...el.com>
Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
---
reproduction:
./nvmupdate64

v2->v3 commit messege typos
v1->v2 commit message update
---
 drivers/net/ethernet/intel/i40e/i40e_adminq.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.h b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
index ee86d2c..55b5bb8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
@@ -109,10 +109,6 @@ static inline int i40e_aq_rc_to_posix(int aq_ret, int aq_rc)
 		-EFBIG,      /* I40E_AQ_RC_EFBIG */
 	};
 
-	/* aq_rc is invalid if AQ timed out */
-	if (aq_ret == -EIO)
-		return -EAGAIN;
-
 	if (!((u32)aq_rc < (sizeof(aq_to_posix) / sizeof((aq_to_posix)[0]))))
 		return -ERANGE;
 
-- 
2.25.1