netdev - [PATCH 5/5] PCI/ERR: Remove remnants of .link

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Message-ID: <1d72a891a7f57115e78a73046e776f7e0c8cd68f.1755008151.git.lukas@wunner.de>
Date: Wed, 13 Aug 2025 07:11:05 +0200
From: Lukas Wunner <lukas@...ner.de>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Riana Tauro <riana.tauro@...el.com>, Aravind Iddamsetty <aravind.iddamsetty@...ux.intel.com>, "Sean C. Dardis" <sean.c.dardis@...el.com>, Terry Bowman <terry.bowman@....com>, Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>, Niklas Schnelle <schnelle@...ux.ibm.com>, Linas Vepstas <linasvepstas@...il.com>, "Mahesh J Salgaonkar" <mahesh@...ux.ibm.com>, "Oliver OHalloran" <oohall@...il.com>, Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>, linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org, Edward Cree <ecree.xilinx@...il.com>, linux-net-drivers@....com, James Smart <james.smart@...adcom.com>, Dick Kennedy <dick.kennedy@...adcom.com>, "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, "Martin K. Petersen" <martin.petersen@...cle.com>, linux-scsi@...r.kernel.org, Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni
 @redhat.com>, netdev@...r.kernel.org
Subject: [PATCH 5/5] PCI/ERR: Remove remnants of .link_reset() callback

Back in 2017, commit 2fd260f03b6a ("PCI/AER: Remove unused .link_reset()
callback") removed .link_reset() from struct pci_error_handlers, but left
a few code comments behind which still mention it.  Remove them.

The code comments in the SolarFlare Ethernet drivers point out that no
.mmio_enabled() callback is needed because the driver's .error_detected()
callback always returns PCI_ERS_RESULT_NEED_RESET, which causes
pcie_do_recovery() to skip .mmio_enabled().  That's not quite correct
because efx_io_error_detected() does return PCI_ERS_RESULT_RECOVERED under
certain conditions and then .mmio_enabled() would indeed be called if it
were implemented.  Remove this misleading portion of the code comment as
well.

Signed-off-by: Lukas Wunner <lukas@...ner.de>
---
 drivers/net/ethernet/sfc/efx_common.c       | 3 ---
 drivers/net/ethernet/sfc/falcon/efx.c       | 3 ---
 drivers/net/ethernet/sfc/siena/efx_common.c | 3 ---
 drivers/scsi/lpfc/lpfc_init.c               | 2 +-
 4 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c
index 5a14d94163b1..e8fdbb62d872 100644
--- a/drivers/net/ethernet/sfc/efx_common.c
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -1258,9 +1258,6 @@ static void efx_io_resume(struct pci_dev *pdev)
 
 /* For simplicity and reliability, we always require a slot reset and try to
  * reset the hardware when a pci error affecting the device is detected.
- * We leave both the link_reset and mmio_enabled callback unimplemented:
- * with our request for slot reset the mmio_enabled callback will never be
- * called, and the link_reset callback is not used by AER or EEH mechanisms.
  */
 const struct pci_error_handlers efx_err_handlers = {
 	.error_detected = efx_io_error_detected,
diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c
index b07f7e4e2877..0c784656fde9 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.c
+++ b/drivers/net/ethernet/sfc/falcon/efx.c
@@ -3128,9 +3128,6 @@ static void ef4_io_resume(struct pci_dev *pdev)
 
 /* For simplicity and reliability, we always require a slot reset and try to
  * reset the hardware when a pci error affecting the device is detected.
- * We leave both the link_reset and mmio_enabled callback unimplemented:
- * with our request for slot reset the mmio_enabled callback will never be
- * called, and the link_reset callback is not used by AER or EEH mechanisms.
  */
 static const struct pci_error_handlers ef4_err_handlers = {
 	.error_detected = ef4_io_error_detected,
diff --git a/drivers/net/ethernet/sfc/siena/efx_common.c b/drivers/net/ethernet/sfc/siena/efx_common.c
index a0966f879664..35036cc902fe 100644
--- a/drivers/net/ethernet/sfc/siena/efx_common.c
+++ b/drivers/net/ethernet/sfc/siena/efx_common.c
@@ -1285,9 +1285,6 @@ static void efx_io_resume(struct pci_dev *pdev)
 
 /* For simplicity and reliability, we always require a slot reset and try to
  * reset the hardware when a pci error affecting the device is detected.
- * We leave both the link_reset and mmio_enabled callback unimplemented:
- * with our request for slot reset the mmio_enabled callback will never be
- * called, and the link_reset callback is not used by AER or EEH mechanisms.
  */
 const struct pci_error_handlers efx_siena_err_handlers = {
 	.error_detected = efx_io_error_detected,
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 4081d2a358ee..cf08bb5b37c3 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -14377,7 +14377,7 @@ lpfc_sli_prep_dev_for_perm_failure(struct lpfc_hba *phba)
  * as desired.
  *
  * Return codes
- * 	PCI_ERS_RESULT_CAN_RECOVER - can be recovered with reset_link
+ *	PCI_ERS_RESULT_CAN_RECOVER - can be recovered without reset
  * 	PCI_ERS_RESULT_NEED_RESET - need to reset before recovery
  * 	PCI_ERS_RESULT_DISCONNECT - device could not be recovered
  **/
-- 
2.47.2