| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20210802145937.1155571-1-arnd@kernel.org>
Date: Mon, 2 Aug 2021 16:59:33 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Jesse Brandeburg <jesse.brandeburg@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jacob Keller <jacob.e.keller@...el.com>
Cc: Arnd Bergmann <arnd@...db.de>,
Richard Cochran <richardcochran@...il.com>,
Kurt Kanzenbach <kurt@...utronix.de>,
Shiraz Saleem <shiraz.saleem@...el.com>,
Dave Ertman <david.m.ertman@...el.com>,
intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2] ethernet/intel: fix PTP_1588_CLOCK dependencies
From: Arnd Bergmann <arnd@...db.de>
The 'imply' keyword does not do what most people think it does, it only
politely asks Kconfig to turn on another symbol, but does not prevent
it from being disabled manually or built as a loadable module when the
user is built-in. In the ICE driver, the latter now causes a link failure:
aarch64-linux-ld: drivers/net/ethernet/intel/ice/ice_main.o: in function `ice_eth_ioctl':
ice_main.c:(.text+0x13b0): undefined reference to `ice_ptp_get_ts_config'
ice_main.c:(.text+0x13b0): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `ice_ptp_get_ts_config'
aarch64-linux-ld: ice_main.c:(.text+0x13bc): undefined reference to `ice_ptp_set_ts_config'
ice_main.c:(.text+0x13bc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `ice_ptp_set_ts_config'
aarch64-linux-ld: drivers/net/ethernet/intel/ice/ice_main.o: in function `ice_prepare_for_reset':
ice_main.c:(.text+0x31fc): undefined reference to `ice_ptp_release'
ice_main.c:(.text+0x31fc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `ice_ptp_release'
aarch64-linux-ld: drivers/net/ethernet/intel/ice/ice_main.o: in function `ice_rebuild':
For the other Intel network drivers, there is no link error when the
drivers are built-in and PTP is a loadable module, because
linux/ptp_clock_kernel.h contains an IS_REACHABLE() check, but this
just changes the compile-time failure to a runtime failure, which is
arguably worse.
Change all the Intel drivers to use the 'depends on PTP_1588_CLOCK ||
!PTP_1588_CLOCK' trick to prevent the broken configuration, as we
already do for several other drivers. To avoid circular dependencies,
this also requires changing the IGB driver back to using the normal
'depends on I2C' instead of 'select I2C'.
This is a recurring problem in many drivers, and we have discussed
it several times befores, without reaching a consensus. I'm providing
a link to the previous email thread for reference, which discusses
some related problems, though I can't find what reasons there were
against the approach with the extra Kconfig dependency.
Fixes: 06c16d89d2cb ("ice: register 1588 PTP clock device object for E810 devices")
Link: https://lore.kernel.org/netdev/CAK8P3a3=eOxE-K25754+fB_-i_0BZzf9a9RfPTX3ppSwu9WZXw@mail.gmail.com/
Link: https://lore.kernel.org/netdev/20210726084540.3282344-1-arnd@kernel.org/
Cc: Richard Cochran <richardcochran@...il.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Changes in v2:
- include a missing patch hunk
- link to a previous discussion with Richard Cochran
---
drivers/net/ethernet/intel/Kconfig | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 2aa84bd97287..3ddadc147d45 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -58,8 +58,8 @@ config E1000
config E1000E
tristate "Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support"
depends on PCI && (!SPARC32 || BROKEN)
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
select CRC32
- imply PTP_1588_CLOCK
help
This driver supports the PCI-Express Intel(R) PRO/1000 gigabit
ethernet family of adapters. For PCI or PCI-X e1000 adapters,
@@ -87,8 +87,8 @@ config E1000E_HWTS
config IGB
tristate "Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support"
depends on PCI
- imply PTP_1588_CLOCK
- select I2C
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
+ depends on I2C
select I2C_ALGOBIT
help
This driver supports Intel(R) 82575/82576 gigabit ethernet family of
@@ -159,9 +159,9 @@ config IXGB
config IXGBE
tristate "Intel(R) 10GbE PCI Express adapters support"
depends on PCI
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
select MDIO
select PHYLIB
- imply PTP_1588_CLOCK
help
This driver supports Intel(R) 10GbE PCI Express family of
adapters. For more information on how to identify your adapter, go
@@ -239,7 +239,7 @@ config IXGBEVF_IPSEC
config I40E
tristate "Intel(R) Ethernet Controller XL710 Family support"
- imply PTP_1588_CLOCK
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
depends on PCI
select AUXILIARY_BUS
help
@@ -295,11 +295,11 @@ config ICE
tristate "Intel(R) Ethernet Connection E800 Series Support"
default n
depends on PCI_MSI
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
select AUXILIARY_BUS
select DIMLIB
select NET_DEVLINK
select PLDMFW
- imply PTP_1588_CLOCK
help
This driver supports Intel(R) Ethernet Connection E800 Series of
devices. For more information on how to identify your adapter, go
@@ -317,7 +317,7 @@ config FM10K
tristate "Intel(R) FM10000 Ethernet Switch Host Interface Support"
default n
depends on PCI_MSI
- imply PTP_1588_CLOCK
+ depends on PTP_1588_CLOCK || !PTP_1588_CLOCK
help
This driver supports Intel(R) FM10000 Ethernet Switch Host
Interface. For more information on how to identify your adapter,
--
2.29.2
Powered by blists - more mailing lists