LinuxLists.cc - [PATCH 0/2] net: phy: call phy_disable_interrupts() in phy_init

2020-06-22 10:33:20

Subject: [PATCH 0/2] net: phy: call phy_disable_interrupts() in phy_init_hw()

2020-06-22 10:34:22

Subject: [PATCH 1/2] net: phy: export phy_disable_interrupts()

We face an issue with rtl8211f, a pin is shared between INTB and PMEB,
and the PHY Register Accessible Interrupt is enabled by default, so
the INTB/PMEB pin is always active in polling mode case.

As Heiner pointed out "I was thinking about calling
phy_disable_interrupts() in phy_init_hw(), to have a defined init
state as we don't know in which state the PHY is if the PHY driver is
loaded. We shouldn't assume that it's the chip power-on defaults, BIOS
or boot loader could have changed this. Or in case of dual-boot
systems the other OS could leave the PHY in whatever state."

Export phy_disable_interrupts() so that it could be used in
phy_init_hw() to have a defined init state.

Suggested-by: Heiner Kallweit <[email protected]>
Signed-off-by: Jisheng Zhang <[email protected]>
---
drivers/net/phy/phy.c | 3 ++-
include/linux/phy.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 1de3938628f4..a3d92a15da71 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -840,7 +840,7 @@ static void phy_error(struct phy_device *phydev)
* phy_disable_interrupts - Disable the PHY interrupts from the PHY side
* @phydev: target phy_device struct
*/
-static int phy_disable_interrupts(struct phy_device *phydev)
+int phy_disable_interrupts(struct phy_device *phydev)
{
int err;

@@ -852,6 +852,7 @@ static int phy_disable_interrupts(struct phy_device *phydev)
/* Clear the interrupt */
return phy_clear_interrupt(phydev);
}
+EXPORT_SYMBOL_GPL(phy_request_interrupt);

/**
* phy_interrupt - PHY interrupt handler
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 8c05d0fb5c00..b693b609b2f5 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1416,6 +1416,7 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd);
+int phy_disable_interrupts(struct phy_device *phydev);
void phy_request_interrupt(struct phy_device *phydev);
void phy_free_interrupt(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
--
2.27.0

2020-06-22 12:57:30

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH 1/2] net: phy: export phy_disable_interrupts()

Hi Jisheng,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.8-rc2 next-20200622]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Jisheng-Zhang/net-phy-call-phy_disable_interrupts-in-phy_init_hw/20200622-183400
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 625d3449788f85569096780592549d0340e9c0c7
config: um-allmodconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce (this is a W=1 build):
# save the attached .config to linux build tree
make W=1 ARCH=um

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All error/warnings (new ones prefixed by >>):

cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs]
In file included from include/linux/uaccess.h:11,
from include/linux/crypto.h:21,
from include/crypto/hash.h:11,
from include/linux/uio.h:10,
from include/linux/socket.h:8,
from include/linux/compat.h:15,
from include/linux/ethtool.h:17,
from include/linux/netdevice.h:37,
from drivers/net/phy/phy.c:17:
arch/um/include/asm/uaccess.h: In function '__access_ok':
arch/um/include/asm/uaccess.h:17:29: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
17 | (((unsigned long) (addr) >= FIXADDR_USER_START) && \
| ^~
arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall'
45 | __access_ok_vsyscall(addr, size) ||
| ^~~~~~~~~~~~~~~~~~~~
In file included from include/linux/kernel.h:11,
from drivers/net/phy/phy.c:11:
include/asm-generic/fixmap.h: In function 'fix_to_virt':
include/asm-generic/fixmap.h:32:19: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
32 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
| ^~
include/linux/compiler.h:372:9: note: in definition of macro '__compiletime_assert'
372 | if (!(condition)) \
| ^~~~~~~~~
include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert'
392 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
include/asm-generic/fixmap.h:32:2: note: in expansion of macro 'BUILD_BUG_ON'
32 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
| ^~~~~~~~~~~~
In file included from include/linux/linkage.h:7,
from include/linux/kernel.h:8,
from drivers/net/phy/phy.c:11:
drivers/net/phy/phy.c: At top level:
>> include/linux/export.h:67:36: error: redefinition of '__ksymtab_phy_request_interrupt'
67 | static const struct kernel_symbol __ksymtab_##sym \
| ^~~~~~~~~~
include/linux/export.h:108:2: note: in expansion of macro '__KSYMTAB_ENTRY'
108 | __KSYMTAB_ENTRY(sym, sec)
| ^~~~~~~~~~~~~~~
include/linux/export.h:147:39: note: in expansion of macro '___EXPORT_SYMBOL'
147 | #define __EXPORT_SYMBOL(sym, sec, ns) ___EXPORT_SYMBOL(sym, sec, ns)
| ^~~~~~~~~~~~~~~~
include/linux/export.h:155:34: note: in expansion of macro '__EXPORT_SYMBOL'
155 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "")
| ^~~~~~~~~~~~~~~
include/linux/export.h:158:29: note: in expansion of macro '_EXPORT_SYMBOL'
158 | #define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "")
| ^~~~~~~~~~~~~~
>> drivers/net/phy/phy.c:928:1: note: in expansion of macro 'EXPORT_SYMBOL'
928 | EXPORT_SYMBOL(phy_request_interrupt);
| ^~~~~~~~~~~~~
include/linux/export.h:67:36: note: previous definition of '__ksymtab_phy_request_interrupt' was here
67 | static const struct kernel_symbol __ksymtab_##sym \
| ^~~~~~~~~~
include/linux/export.h:108:2: note: in expansion of macro '__KSYMTAB_ENTRY'
108 | __KSYMTAB_ENTRY(sym, sec)
| ^~~~~~~~~~~~~~~
include/linux/export.h:147:39: note: in expansion of macro '___EXPORT_SYMBOL'
147 | #define __EXPORT_SYMBOL(sym, sec, ns) ___EXPORT_SYMBOL(sym, sec, ns)
| ^~~~~~~~~~~~~~~~
include/linux/export.h:155:34: note: in expansion of macro '__EXPORT_SYMBOL'
155 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "")
| ^~~~~~~~~~~~~~~
include/linux/export.h:159:33: note: in expansion of macro '_EXPORT_SYMBOL'
159 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl")
| ^~~~~~~~~~~~~~
>> drivers/net/phy/phy.c:855:1: note: in expansion of macro 'EXPORT_SYMBOL_GPL'
855 | EXPORT_SYMBOL_GPL(phy_request_interrupt);
| ^~~~~~~~~~~~~~~~~

vim +/__ksymtab_phy_request_interrupt +67 include/linux/export.h

f50169324df4ad Paul Gortmaker 2011-05-23 41
7290d58095712a Ard Biesheuvel 2018-08-21 42 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
7290d58095712a Ard Biesheuvel 2018-08-21 43 #include <linux/compiler.h>
7290d58095712a Ard Biesheuvel 2018-08-21 44 /*
7290d58095712a Ard Biesheuvel 2018-08-21 45 * Emit the ksymtab entry as a pair of relative references: this reduces
7290d58095712a Ard Biesheuvel 2018-08-21 46 * the size by half on 64-bit architectures, and eliminates the need for
7290d58095712a Ard Biesheuvel 2018-08-21 47 * absolute relocations that require runtime processing on relocatable
7290d58095712a Ard Biesheuvel 2018-08-21 48 * kernels.
7290d58095712a Ard Biesheuvel 2018-08-21 49 */
7290d58095712a Ard Biesheuvel 2018-08-21 50 #define __KSYMTAB_ENTRY(sym, sec) \
7290d58095712a Ard Biesheuvel 2018-08-21 51 __ADDRESSABLE(sym) \
7290d58095712a Ard Biesheuvel 2018-08-21 52 asm(" .section \"___ksymtab" sec "+" #sym "\", \"a\" \n" \
ed13fc33f76303 Matthias Maennich 2019-09-06 53 " .balign 4 \n" \
7290d58095712a Ard Biesheuvel 2018-08-21 54 "__ksymtab_" #sym ": \n" \
7290d58095712a Ard Biesheuvel 2018-08-21 55 " .long " #sym "- . \n" \
7290d58095712a Ard Biesheuvel 2018-08-21 56 " .long __kstrtab_" #sym "- . \n" \
c3a6cf19e695c8 Masahiro Yamada 2019-10-18 57 " .long __kstrtabns_" #sym "- . \n" \
7290d58095712a Ard Biesheuvel 2018-08-21 58 " .previous \n")
7290d58095712a Ard Biesheuvel 2018-08-21 59
7290d58095712a Ard Biesheuvel 2018-08-21 60 struct kernel_symbol {
7290d58095712a Ard Biesheuvel 2018-08-21 61 int value_offset;
7290d58095712a Ard Biesheuvel 2018-08-21 62 int name_offset;
8651ec01daedad Matthias Maennich 2019-09-06 63 int namespace_offset;
7290d58095712a Ard Biesheuvel 2018-08-21 64 };
7290d58095712a Ard Biesheuvel 2018-08-21 65 #else
7290d58095712a Ard Biesheuvel 2018-08-21 66 #define __KSYMTAB_ENTRY(sym, sec) \
7290d58095712a Ard Biesheuvel 2018-08-21 @67 static const struct kernel_symbol __ksymtab_##sym \
7290d58095712a Ard Biesheuvel 2018-08-21 68 __attribute__((section("___ksymtab" sec "+" #sym), used)) \
ed13fc33f76303 Matthias Maennich 2019-09-06 69 __aligned(sizeof(void *)) \
c3a6cf19e695c8 Masahiro Yamada 2019-10-18 70 = { (unsigned long)&sym, __kstrtab_##sym, __kstrtabns_##sym }
7290d58095712a Ard Biesheuvel 2018-08-21 71

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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2020-06-22 16:54:45

by kernel test robot

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Subject: Re: [PATCH 1/2] net: phy: export phy_disable_interrupts()

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