linux-kernel - [PATCH 1/1] net/mlx5: Convert PCI error values to generic errnos

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Message-Id: <20230814132721.26608-1-ilpo.jarvinen@linux.intel.com>
Date:   Mon, 14 Aug 2023 16:27:20 +0300
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Bjorn Helgaas <helgaas@...nel.org>, linux-pci@...r.kernel.org,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Moshe Shemesh <moshe@...lanox.com>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 1/1] net/mlx5: Convert PCI error values to generic errnos

mlx5_pci_link_toggle() returns mix PCI specific error codes and generic
errnos.

Convert the PCI specific error values to generic errno using
pcibios_err_to_errno() before returning them.

Fixes: eabe8e5e88f5 ("net/mlx5: Handle sync reset now event")
Fixes: 212b4d7251c1 ("net/mlx5: Wait for firmware to enable CRS before pci_restore_state")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

---

Maintainers beware, this will conflict with read+write -> set/clear_word
fixes in pci.git/pcie-rmw. As such, it might be the easiest for Bjorn to
take it instead of net people.


I wonder if these PCIBIOS_* error codes are useful at all? There's 1:1
mapping into errno values so no information loss if the functions would just
return errnos directly. Perhaps this is just legacy nobody has bothered to
remove? If nobody opposes, I could take a look at getting rid of them.

---
 drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
index 4804990b7f22..0afd9dbfc471 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
@@ -371,7 +371,7 @@ static int mlx5_pci_link_toggle(struct mlx5_core_dev *dev)
 
 	err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, &dev_id);
 	if (err)
-		return err;
+		return pcibios_err_to_errno(err);
 	err = mlx5_check_dev_ids(dev, dev_id);
 	if (err)
 		return err;
@@ -386,16 +386,16 @@ static int mlx5_pci_link_toggle(struct mlx5_core_dev *dev)
 	/* PCI link toggle */
 	err = pci_read_config_word(bridge, cap + PCI_EXP_LNKCTL, &reg16);
 	if (err)
-		return err;
+		return pcibios_err_to_errno(err);
 	reg16 |= PCI_EXP_LNKCTL_LD;
 	err = pci_write_config_word(bridge, cap + PCI_EXP_LNKCTL, reg16);
 	if (err)
-		return err;
+		return pcibios_err_to_errno(err);
 	msleep(500);
 	reg16 &= ~PCI_EXP_LNKCTL_LD;
 	err = pci_write_config_word(bridge, cap + PCI_EXP_LNKCTL, reg16);
 	if (err)
-		return err;
+		return pcibios_err_to_errno(err);
 
 	/* Check link */
 	if (!bridge->link_active_reporting) {
@@ -408,7 +408,7 @@ static int mlx5_pci_link_toggle(struct mlx5_core_dev *dev)
 	do {
 		err = pci_read_config_word(bridge, cap + PCI_EXP_LNKSTA, &reg16);
 		if (err)
-			return err;
+			return pcibios_err_to_errno(err);
 		if (reg16 & PCI_EXP_LNKSTA_DLLLA)
 			break;
 		msleep(20);
@@ -426,7 +426,7 @@ static int mlx5_pci_link_toggle(struct mlx5_core_dev *dev)
 	do {
 		err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, &reg16);
 		if (err)
-			return err;
+			return pcibios_err_to_errno(err);
 		if (reg16 == dev_id)
 			break;
 		msleep(20);
-- 
2.30.2