1. 20 4月, 2017 1 次提交
    • H
      ACPI / AC: Add a blacklist with PMIC ACPI HIDs with a native charger driver · af3ec837
      Hans de Goede 提交于
      On some systems we have a native PMIC driver which provides Mains
      monitoring, while the ACPI ac driver is broken on these systems
      due to bad DSTDs or because we do not support the proprietary and
      undocumented ACPI opregions these ACPI battery devices rely on
      (e.g. BMOP opregion).
      
      This leads for example to a ADP1 power_supply which reports
      itself as always online even if no mains are connected.
      
      This commit adds a blacklist with PMIC ACPI HIDs for which we've a
      native charger or extcon driver and makes the ACPI ac driver not
      register itself when a PMIC on this list is present.
      Signed-off-by: NHans de Goede <hdegoede@redhat.com>
      Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      af3ec837
  2. 08 7月, 2015 1 次提交
  3. 15 6月, 2015 1 次提交
  4. 14 3月, 2015 2 次提交
    • K
      power_supply: Change ownership from driver to core · 297d716f
      Krzysztof Kozlowski 提交于
      Change the ownership of power_supply structure from each driver
      implementing the class to the power supply core.
      
      The patch changes power_supply_register() function thus all drivers
      implementing power supply class are adjusted.
      
      Each driver provides the implementation of power supply. However it
      should not be the owner of power supply class instance because it is
      exposed by core to other subsystems with power_supply_get_by_name().
      These other subsystems have no knowledge when the driver will unregister
      the power supply. This leads to several issues when driver is unbound -
      mostly because user of power supply accesses freed memory.
      
      Instead let the core own the instance of struct 'power_supply'.  Other
      users of this power supply will still access valid memory because it
      will be freed when device reference count reaches 0. Currently this
      means "it will leak" but power_supply_put() call in next patches will
      solve it.
      
      This solves invalid memory references in following race condition
      scenario:
      
      Thread 1: charger manager
      Thread 2: power supply driver, used by charger manager
      
      THREAD 1 (charger manager)         THREAD 2 (power supply driver)
      ==========================         ==============================
      psy = power_supply_get_by_name()
                                         Driver unbind, .remove
                                           power_supply_unregister()
                                           Device fully removed
      psy->get_property()
      
      The 'get_property' call is executed in invalid context because the driver was
      unbound and struct 'power_supply' memory was freed.
      
      This could be observed easily with charger manager driver (here compiled
      with max17040 fuel gauge):
      
      $ cat /sys/devices/virtual/power_supply/cm-battery/capacity &
      $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind
      [   55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000
      [   55.732584] pgd = d98d4000
      [   55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000
      [   55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
      [   55.746210] Modules linked in:
      [   55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G        W       3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496
      [   55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
      [   55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000
      [   55.771647] PC is at 0x0
      [   55.774182] LR is at charger_get_property+0x2f4/0x36c
      [   55.779201] pc : [<00000000>]    lr : [<c034b0b4>]    psr: 60000013
      [   55.779201] sp : daf55e90  ip : 00000003  fp : 00000000
      [   55.790657] r10: 00000000  r9 : c06e2878  r8 : d9b26c68
      [   55.795865] r7 : dad81610  r6 : daec7410  r5 : daf55ebc  r4 : 00000000
      [   55.802367] r3 : 00000000  r2 : daf55ebc  r1 : 0000002a  r0 : d9b26c68
      [   55.808879] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
      [   55.815994] Control: 10c5387d  Table: 598d406a  DAC: 00000015
      [   55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210)
      [   55.827451] Stack: (0xdaf55e90 to 0xdaf56000)
      [   55.831795] 5e80:                                     60000013 c01459c4 0000002a c06f8ef8
      [   55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4
      [   55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80
      [   55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001
      [   55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000
      [   55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000
      [   55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124
      [   55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550
      [   55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364
      [   55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c
      [   55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000
      [   55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000
      [   55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c)
      [   55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48)
      [   55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104)
      [   55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28)
      [   55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484)
      [   55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c)
      [   55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100)
      [   55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c)
      [   55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48)
      [   56.000626] Code: bad PC value
      [   56.011652] ---[ end trace 7b64343fbdae8ef1 ]---
      Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
      Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
      
      [for the nvec part]
      Reviewed-by: NMarc Dietrich <marvin24@gmx.de>
      
      [for compal-laptop.c]
      Acked-by: NDarren Hart <dvhart@linux.intel.com>
      
      [for the mfd part]
      Acked-by: NLee Jones <lee.jones@linaro.org>
      
      [for the hid part]
      Acked-by: NJiri Kosina <jkosina@suse.cz>
      
      [for the acpi part]
      Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Signed-off-by: NSebastian Reichel <sre@kernel.org>
      297d716f
    • K
      power_supply: Move run-time configuration to separate structure · 2dc9215d
      Krzysztof Kozlowski 提交于
      Add new structure 'power_supply_config' for holding run-time
      initialization data like of_node, supplies and private driver data.
      
      The power_supply_register() function is changed so all power supply
      drivers need updating.
      
      When registering the power supply this new 'power_supply_config' should be
      used instead of directly initializing 'struct power_supply'. This allows
      changing the ownership of power_supply structure from driver to the
      power supply core in next patches.
      
      When a driver does not use of_node or supplies then it should use NULL
      as config. If driver uses of_node or supplies then it should allocate
      config on stack and initialize it with proper values.
      Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
      Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
      Acked-by: NPavel Machek <pavel@ucw.cz>
      
      [for the nvec part]
      Reviewed-by: NMarc Dietrich <marvin24@gmx.de>
      
      [for drivers/platform/x86/compal-laptop.c]
      Reviewed-by: NDarren Hart <dvhart@linux.intel.com>
      
      [for drivers/hid/*]
      Reviewed-by: NJiri Kosina <jkosina@suse.cz>
      Signed-off-by: NSebastian Reichel <sre@kernel.org>
      2dc9215d
  5. 07 7月, 2014 1 次提交
  6. 08 5月, 2014 1 次提交
  7. 19 3月, 2014 1 次提交
  8. 13 2月, 2014 1 次提交
  9. 05 1月, 2014 1 次提交
  10. 07 12月, 2013 1 次提交
    • L
      ACPI: Clean up inclusions of ACPI header files · 8b48463f
      Lv Zheng 提交于
      Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and
      <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h>
      inclusions and remove some inclusions of those files that aren't
      necessary.
      
      First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>
      should not be included directly from any files that are built for
      CONFIG_ACPI unset, because that generally leads to build warnings about
      undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
      <linux/acpi.h> includes those files and for CONFIG_ACPI unset it
      provides stub ACPI symbols to be used in that case.
      
      Second, there are ordering dependencies between those files that always
      have to be met.  Namely, it is required that <acpi/acpi_bus.h> be included
      prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the
      latter depends on are always there.  And <acpi/acpi.h> which provides
      basic ACPICA type declarations should always be included prior to any other
      ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
      <linux/acpi.h> as appropriate.
      Signed-off-by: NLv Zheng <lv.zheng@intel.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Matthew Garrett <mjg59@srcf.ucam.org>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff)
      Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff)
      Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      8b48463f
  11. 15 11月, 2013 1 次提交
  12. 16 10月, 2013 1 次提交
  13. 26 9月, 2013 1 次提交
  14. 15 7月, 2013 1 次提交
  15. 12 5月, 2013 1 次提交
    • L
      ACPI / AC: Add sleep quirk for Thinkpad e530 · 0ab5bb64
      Lan Tianyu 提交于
      The Thinkpad e530's BIOS notifies the AC device first and then
      sleeps for certain amount of time before doing real work in the
      EC event handler (_Qxx):
      
       Method (_Q27, 0, NotSerialized)
       {
             Notify (AC, 0x80)
             Sleep (0x03E8)
             Store (Zero, PWRS)
             PNOT ()
       }
      
      This causes the AC driver to report an outdated AC state to user
      space, because it reads the state information from the device while
      the EC handler is sleeping.
      
      Introduce a quirk to cause the AC driver to wait in acpi_ac_notify()
      before calling acpi_ac_get_state() on systems known to have this
      problem and add Thinkpad e530 to the list of quirky machines (with
      a 1s delay which has been verified to be sufficient for that
      machine).
      
      [rjw: Changelog]
      References: https://bugzilla.kernel.org/show_bug.cgi?id=45221Signed-off-by: NLan Tianyu <tianyu.lan@intel.com>
      Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      0ab5bb64
  16. 10 4月, 2013 1 次提交
    • A
      procfs: new helper - PDE_DATA(inode) · d9dda78b
      Al Viro 提交于
      The only part of proc_dir_entry the code outside of fs/proc
      really cares about is PDE(inode)->data.  Provide a helper
      for that; static inline for now, eventually will be moved
      to fs/proc, along with the knowledge of struct proc_dir_entry
      layout.
      Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      d9dda78b
  17. 26 1月, 2013 1 次提交
  18. 10 8月, 2012 1 次提交
  19. 24 7月, 2012 1 次提交
  20. 01 7月, 2012 1 次提交
  21. 21 7月, 2011 1 次提交
    • P
      treewide: fix potentially dangerous trailing ';' in #defined values/expressions · 497888cf
      Phil Carmody 提交于
      All these are instances of
        #define NAME value;
      or
        #define NAME(params_opt) value;
      
      These of course fail to build when used in contexts like
        if(foo $OP NAME)
        while(bar $OP NAME)
      and may silently generate the wrong code in contexts such as
        foo = NAME + 1;    /* foo = value; + 1; */
        bar = NAME - 1;    /* bar = value; - 1; */
        baz = NAME & quux; /* baz = value; & quux; */
      
      Reported on comp.lang.c,
      Message-ID: <ab0d55fe-25e5-482b-811e-c475aa6065c3@c29g2000yqd.googlegroups.com>
      Initial analysis of the dangers provided by Keith Thompson in that thread.
      
      There are many more instances of more complicated macros having unnecessary
      trailing semicolons, but this pile seems to be all of the cases of simple
      values suffering from the problem. (Thus things that are likely to be found
      in one of the contexts above, more complicated ones aren't.)
      Signed-off-by: NPhil Carmody <ext-phil.2.carmody@nokia.com>
      Signed-off-by: NJiri Kosina <jkosina@suse.cz>
      497888cf
  22. 12 1月, 2011 1 次提交
    • Z
      ACPI: delete CONFIG_ACPI_PROCFS_POWER and power procfs I/F in 2.6.39 · 6d855fcd
      Zhang Rui 提交于
      sysfs I/F for ACPI power devices, including AC and Battery,
      has been working in upstream kenrel since 2.6.24, Sep 2007.
      In 2.6.37, we made the sysfs I/F always built in and this option
      disabled by default.
      Now, we plan to remove this option and the ACPI power procfs
      interface in 2.6.39.
      
      First, update the feature-removal-schedule to announce this change.
      Second, add runtime warnings in ACPI AC/Battery/SBS driver, so that
      users will notice this change even if "make oldconfig" is used.
      Signed-off-by: NZhang Rui <rui.zhang@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      6d855fcd
  23. 10 12月, 2010 1 次提交
  24. 16 10月, 2010 1 次提交
  25. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo 提交于
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  26. 07 10月, 2009 1 次提交
  27. 29 8月, 2009 1 次提交
  28. 18 6月, 2009 1 次提交
  29. 31 3月, 2009 1 次提交
    • A
      proc 2/2: remove struct proc_dir_entry::owner · 99b76233
      Alexey Dobriyan 提交于
      Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
      as correctly noted at bug #12454. Someone can lookup entry with NULL
      ->owner, thus not pinning enything, and release it later resulting
      in module refcount underflow.
      
      We can keep ->owner and supply it at registration time like ->proc_fops
      and ->data.
      
      But this leaves ->owner as easy-manipulative field (just one C assignment)
      and somebody will forget to unpin previous/pin current module when
      switching ->owner. ->proc_fops is declared as "const" which should give
      some thoughts.
      
      ->read_proc/->write_proc were just fixed to not require ->owner for
      protection.
      
      rmmod'ed directories will be empty and return "." and ".." -- no harm.
      And directories with tricky enough readdir and lookup shouldn't be modular.
      We definitely don't want such modular code.
      
      Removing ->owner will also make PDE smaller.
      
      So, let's nuke it.
      
      Kudos to Jeff Layton for reminding about this, let's say, oversight.
      
      http://bugzilla.kernel.org/show_bug.cgi?id=12454Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
      99b76233
  30. 08 11月, 2008 1 次提交
  31. 07 11月, 2008 1 次提交
    • K
      ACPI: struct device - replace bus_id with dev_name(), dev_set_name() · 0794469d
      Kay Sievers 提交于
      This patch is part of a larger patch series which will remove
      the "char bus_id[20]" name string from struct device. The device
      name is managed in the kobject anyway, and without any size
      limitation, and just needlessly copied into "struct device".
      
      To set and read the device name dev_name(dev) and dev_set_name(dev)
      must be used. If your code uses static kobjects, which it shouldn't
      do, "const char *init_name" can be used to statically provide the
      name the registered device should have. At registration time, the
      init_name field is cleared, to enforce the use of dev_name(dev) to
      access the device name at a later time.
      
      We need to get rid of all occurrences of bus_id in the entire tree
      to be able to enable the new interface. Please apply this patch,
      and possibly convert any remaining remaining occurrences of bus_id.
      
      We want to submit a patch to -next, which will remove bus_id from
      "struct device", to find the remaining pieces to convert, and finally
      switch over to the new api, which will remove the 20 bytes array
      and does no longer have a size limitation.
      Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
      Signed-Off-By: NKay Sievers <kay.sievers@vrfy.org>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      0794469d
  32. 11 10月, 2008 2 次提交
  33. 14 6月, 2008 1 次提交
  34. 29 4月, 2008 1 次提交
  35. 22 4月, 2008 1 次提交
  36. 02 1月, 2008 1 次提交
  37. 20 11月, 2007 1 次提交
  38. 15 11月, 2007 1 次提交