[PATCH v3] eth: fbnic: Revert "eth: fbnic: Add hardware monitoring support via HWMON interface"
From: Su Hui <hidden>
Date: 2025-01-06 02:37:08
Also in:
kernel-janitors, linux-hwmon, lkml
Subsystem:
meta ethernet drivers, networking drivers, the rest · Maintainers:
Alexander Duyck, Jakub Kicinski, Andrew Lunn, "David S. Miller", Eric Dumazet, Paolo Abeni, Linus Torvalds
There is a garbage value problem in fbnic_mac_get_sensor_asic(). 'fw_cmpl'
is uninitialized which makes 'sensor' and '*val' to be stored garbage
value. Revert commit d85ebade02e8 ("eth: fbnic: Add hardware monitoring
support via HWMON interface") to avoid this problem.
Fixes: d85ebade02e8 ("eth: fbnic: Add hardware monitoring support via HWMON interface")
Signed-off-by: Su Hui <redacted>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Suggested-by: Michal Swiatkowski <redacted>
---
v3:
- revert the whole commit.
v2:
- remove the whole body of fbnic_mac_get_sensor_asic().
v1:
- https://lore.kernel.org/all/20241224022728.675609-1-suhui@nfschina.com/ (local)
drivers/net/ethernet/meta/fbnic/Makefile | 1 -
drivers/net/ethernet/meta/fbnic/fbnic.h | 5 --
drivers/net/ethernet/meta/fbnic/fbnic_fw.h | 7 --
drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c | 81 -------------------
drivers/net/ethernet/meta/fbnic/fbnic_mac.c | 22 -----
drivers/net/ethernet/meta/fbnic/fbnic_mac.h | 7 --
drivers/net/ethernet/meta/fbnic/fbnic_pci.c | 3 -
7 files changed, 126 deletions(-)
delete mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c
diff --git a/drivers/net/ethernet/meta/fbnic/Makefile b/drivers/net/ethernet/meta/fbnic/Makefile
index 239b2258ec65..ea6214ca48e7 100644
--- a/drivers/net/ethernet/meta/fbnic/Makefile
+++ b/drivers/net/ethernet/meta/fbnic/Makefile@@ -13,7 +13,6 @@ fbnic-y := fbnic_csr.o \ fbnic_ethtool.o \ fbnic_fw.o \ fbnic_hw_stats.o \ - fbnic_hwmon.o \ fbnic_irq.o \ fbnic_mac.o \ fbnic_netdev.o \
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic.h b/drivers/net/ethernet/meta/fbnic/fbnic.h
index 706ae6104c8e..744eb0d95449 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic.h
+++ b/drivers/net/ethernet/meta/fbnic/fbnic.h@@ -20,7 +20,6 @@ struct fbnic_dev { struct device *dev; struct net_device *netdev; struct dentry *dbg_fbd; - struct device *hwmon; u32 __iomem *uc_addr0; u32 __iomem *uc_addr4;
@@ -33,7 +32,6 @@ struct fbnic_dev { struct fbnic_fw_mbx mbx[FBNIC_IPC_MBX_INDICES]; struct fbnic_fw_cap fw_cap; - struct fbnic_fw_completion *cmpl_data; /* Lock protecting Tx Mailbox queue to prevent possible races */ spinlock_t fw_tx_lock;
@@ -142,9 +140,6 @@ void fbnic_devlink_unregister(struct fbnic_dev *fbd); int fbnic_fw_enable_mbx(struct fbnic_dev *fbd); void fbnic_fw_disable_mbx(struct fbnic_dev *fbd); -void fbnic_hwmon_register(struct fbnic_dev *fbd); -void fbnic_hwmon_unregister(struct fbnic_dev *fbd); - int fbnic_pcs_irq_enable(struct fbnic_dev *fbd); void fbnic_pcs_irq_disable(struct fbnic_dev *fbd);
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_fw.h b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
index 7cd8841920e4..221faf8c6756 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_fw.h
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_fw.h@@ -44,13 +44,6 @@ struct fbnic_fw_cap { u8 link_fec; }; -struct fbnic_fw_completion { - struct { - s32 millivolts; - s32 millidegrees; - } tsene; -}; - void fbnic_mbx_init(struct fbnic_dev *fbd); void fbnic_mbx_clean(struct fbnic_dev *fbd); void fbnic_mbx_poll(struct fbnic_dev *fbd);
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c b/drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c
deleted file mode 100644
index bcd1086e3768..000000000000
--- a/drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c
+++ /dev/null@@ -1,81 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) Meta Platforms, Inc. and affiliates. */ - -#include <linux/hwmon.h> - -#include "fbnic.h" -#include "fbnic_mac.h" - -static int fbnic_hwmon_sensor_id(enum hwmon_sensor_types type) -{ - if (type == hwmon_temp) - return FBNIC_SENSOR_TEMP; - if (type == hwmon_in) - return FBNIC_SENSOR_VOLTAGE; - - return -EOPNOTSUPP; -} - -static umode_t fbnic_hwmon_is_visible(const void *drvdata, - enum hwmon_sensor_types type, - u32 attr, int channel) -{ - if (type == hwmon_temp && attr == hwmon_temp_input) - return 0444; - if (type == hwmon_in && attr == hwmon_in_input) - return 0444; - - return 0; -} - -static int fbnic_hwmon_read(struct device *dev, enum hwmon_sensor_types type, - u32 attr, int channel, long *val) -{ - struct fbnic_dev *fbd = dev_get_drvdata(dev); - const struct fbnic_mac *mac = fbd->mac; - int id; - - id = fbnic_hwmon_sensor_id(type); - return id < 0 ? id : mac->get_sensor(fbd, id, val); -} - -static const struct hwmon_ops fbnic_hwmon_ops = { - .is_visible = fbnic_hwmon_is_visible, - .read = fbnic_hwmon_read, -}; - -static const struct hwmon_channel_info *fbnic_hwmon_info[] = { - HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), - HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), - NULL -}; - -static const struct hwmon_chip_info fbnic_chip_info = { - .ops = &fbnic_hwmon_ops, - .info = fbnic_hwmon_info, -}; - -void fbnic_hwmon_register(struct fbnic_dev *fbd) -{ - if (!IS_REACHABLE(CONFIG_HWMON)) - return; - - fbd->hwmon = hwmon_device_register_with_info(fbd->dev, "fbnic", - fbd, &fbnic_chip_info, - NULL); - if (IS_ERR(fbd->hwmon)) { - dev_notice(fbd->dev, - "Failed to register hwmon device %pe\n", - fbd->hwmon); - fbd->hwmon = NULL; - } -} - -void fbnic_hwmon_unregister(struct fbnic_dev *fbd) -{ - if (!IS_REACHABLE(CONFIG_HWMON) || !fbd->hwmon) - return; - - hwmon_device_unregister(fbd->hwmon); - fbd->hwmon = NULL; -}
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c
index 80b82ff12c4d..7b654d0a6dac 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c@@ -686,27 +686,6 @@ fbnic_mac_get_eth_mac_stats(struct fbnic_dev *fbd, bool reset, MAC_STAT_TX_BROADCAST); } -static int fbnic_mac_get_sensor_asic(struct fbnic_dev *fbd, int id, long *val) -{ - struct fbnic_fw_completion fw_cmpl; - s32 *sensor; - - switch (id) { - case FBNIC_SENSOR_TEMP: - sensor = &fw_cmpl.tsene.millidegrees; - break; - case FBNIC_SENSOR_VOLTAGE: - sensor = &fw_cmpl.tsene.millivolts; - break; - default: - return -EINVAL; - } - - *val = *sensor; - - return 0; -} - static const struct fbnic_mac fbnic_mac_asic = { .init_regs = fbnic_mac_init_regs, .pcs_enable = fbnic_pcs_enable_asic,
@@ -716,7 +695,6 @@ static const struct fbnic_mac fbnic_mac_asic = { .get_eth_mac_stats = fbnic_mac_get_eth_mac_stats, .link_down = fbnic_mac_link_down_asic, .link_up = fbnic_mac_link_up_asic, - .get_sensor = fbnic_mac_get_sensor_asic, }; /**
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.h b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h
index 05a591653e09..476239a9d381 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_mac.h
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.h@@ -47,11 +47,6 @@ enum { #define FBNIC_LINK_MODE_PAM4 (FBNIC_LINK_50R1) #define FBNIC_LINK_MODE_MASK (FBNIC_LINK_AUTO - 1) -enum fbnic_sensor_id { - FBNIC_SENSOR_TEMP, /* Temp in millidegrees Centigrade */ - FBNIC_SENSOR_VOLTAGE, /* Voltage in millivolts */ -}; - /* This structure defines the interface hooks for the MAC. The MAC hooks * will be configured as a const struct provided with a set of function * pointers.
@@ -88,8 +83,6 @@ struct fbnic_mac { void (*link_down)(struct fbnic_dev *fbd); void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause); - - int (*get_sensor)(struct fbnic_dev *fbd, int id, long *val); }; int fbnic_mac_init(struct fbnic_dev *fbd);
diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_pci.c b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c
index 32702dc4a066..7ccf192f13d5 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_pci.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c@@ -296,8 +296,6 @@ static int fbnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) /* Capture snapshot of hardware stats so netdev can calculate delta */ fbnic_reset_hw_stats(fbd); - fbnic_hwmon_register(fbd); - if (!fbd->dsn) { dev_warn(&pdev->dev, "Reading serial number failed\n"); goto init_failure_mode;
@@ -360,7 +358,6 @@ static void fbnic_remove(struct pci_dev *pdev) fbnic_netdev_free(fbd); } - fbnic_hwmon_unregister(fbd); fbnic_dbg_fbd_exit(fbd); fbnic_devlink_unregister(fbd); fbnic_fw_disable_mbx(fbd);
--
2.30.2