1. 29 Sep, 2018 5 commits
  2. 10 Sep, 2018 1 commit
  3. 15 Aug, 2018 2 commits
  4. 03 Aug, 2018 9 commits
  5. 12 Jun, 2018 2 commits
    • Kees Cook's avatar
      treewide: devm_kzalloc() -> devm_kcalloc() · a86854d0
      Kees Cook authored
      The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
      This patch replaces cases of:
      
              devm_kzalloc(handle, a * b, gfp)
      
      with:
              devm_kcalloc(handle, a * b, gfp)
      
      as well as handling cases of:
      
              devm_kzalloc(handle, a * b * c, gfp)
      
      with:
      
              devm_kzalloc(handle, array3_size(a, b, c), gfp)
      
      as it's slightly less ugly than:
      
              devm_kcalloc(handle, array_size(a, b), c, gfp)
      
      This does, however, attempt to ignore constant size factors like:
      
              devm_kzalloc(handle, 4 * 1024, gfp)
      
      though any constants defined via macros get caught up in the conversion.
      
      Any factors with a sizeof() of "unsigned char", "char", and "u8" were
      dropped, since they're redundant.
      
      Some manual whitespace fixes were needed in this patch, as Coccinelle
      really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".
      
      The Coccinelle script used for this was:
      
      // Fix redundant parens around sizeof().
      @@
      expression HANDLE;
      type TYPE;
      expression THING, E;
      @@
      
      (
        devm_kzalloc(HANDLE,
      -	(sizeof(TYPE)) * E
      +	sizeof(TYPE) * E
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(sizeof(THING)) * E
      +	sizeof(THING) * E
        , ...)
      )
      
      // Drop single-byte sizes and redundant parens.
      @@
      expression HANDLE;
      expression COUNT;
      typedef u8;
      typedef __u8;
      @@
      
      (
        devm_kzalloc(HANDLE,
      -	sizeof(u8) * (COUNT)
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(__u8) * (COUNT)
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(char) * (COUNT)
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(unsigned char) * (COUNT)
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(u8) * COUNT
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(__u8) * COUNT
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(char) * COUNT
      +	COUNT
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(unsigned char) * COUNT
      +	COUNT
        , ...)
      )
      
      // 2-factor product with sizeof(type/expression) and identifier or constant.
      @@
      expression HANDLE;
      type TYPE;
      expression THING;
      identifier COUNT_ID;
      constant COUNT_CONST;
      @@
      
      (
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * (COUNT_ID)
      +	COUNT_ID, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * COUNT_ID
      +	COUNT_ID, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * (COUNT_CONST)
      +	COUNT_CONST, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * COUNT_CONST
      +	COUNT_CONST, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * (COUNT_ID)
      +	COUNT_ID, sizeof(THING)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * COUNT_ID
      +	COUNT_ID, sizeof(THING)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * (COUNT_CONST)
      +	COUNT_CONST, sizeof(THING)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * COUNT_CONST
      +	COUNT_CONST, sizeof(THING)
        , ...)
      )
      
      // 2-factor product, only identifiers.
      @@
      expression HANDLE;
      identifier SIZE, COUNT;
      @@
      
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	SIZE * COUNT
      +	COUNT, SIZE
        , ...)
      
      // 3-factor product with 1 sizeof(type) or sizeof(expression), with
      // redundant parens removed.
      @@
      expression HANDLE;
      expression THING;
      identifier STRIDE, COUNT;
      type TYPE;
      @@
      
      (
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE) * (COUNT) * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE) * (COUNT) * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE) * COUNT * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE) * COUNT * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING) * (COUNT) * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING) * (COUNT) * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING) * COUNT * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING) * COUNT * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      )
      
      // 3-factor product with 2 sizeof(variable), with redundant parens removed.
      @@
      expression HANDLE;
      expression THING1, THING2;
      identifier COUNT;
      type TYPE1, TYPE2;
      @@
      
      (
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING1) * sizeof(THING2) * COUNT
      +	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(THING1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE1) * sizeof(THING2) * COUNT
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
        , ...)
      )
      
      // 3-factor product, only identifiers, with redundant parens removed.
      @@
      expression HANDLE;
      identifier STRIDE, SIZE, COUNT;
      @@
      
      (
        devm_kzalloc(HANDLE,
      -	(COUNT) * STRIDE * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	COUNT * (STRIDE) * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	COUNT * STRIDE * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(COUNT) * (STRIDE) * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	COUNT * (STRIDE) * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(COUNT) * STRIDE * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(COUNT) * (STRIDE) * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	COUNT * STRIDE * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      )
      
      // Any remaining multi-factor products, first at least 3-factor products,
      // when they're not all constants...
      @@
      expression HANDLE;
      expression E1, E2, E3;
      constant C1, C2, C3;
      @@
      
      (
        devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
      |
        devm_kzalloc(HANDLE,
      -	(E1) * E2 * E3
      +	array3_size(E1, E2, E3)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(E1) * (E2) * E3
      +	array3_size(E1, E2, E3)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	(E1) * (E2) * (E3)
      +	array3_size(E1, E2, E3)
        , ...)
      |
        devm_kzalloc(HANDLE,
      -	E1 * E2 * E3
      +	array3_size(E1, E2, E3)
        , ...)
      )
      
      // And then all remaining 2 factors products when they're not all constants,
      // keeping sizeof() as the second factor argument.
      @@
      expression HANDLE;
      expression THING, E1, E2;
      type TYPE;
      constant C1, C2, C3;
      @@
      
      (
        devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
      |
        devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
      |
        devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
      |
        devm_kzalloc(HANDLE, C1 * C2, ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * (E2)
      +	E2, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(TYPE) * E2
      +	E2, sizeof(TYPE)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * (E2)
      +	E2, sizeof(THING)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	sizeof(THING) * E2
      +	E2, sizeof(THING)
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	(E1) * E2
      +	E1, E2
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	(E1) * (E2)
      +	E1, E2
        , ...)
      |
      - devm_kzalloc
      + devm_kcalloc
        (HANDLE,
      -	E1 * E2
      +	E1, E2
        , ...)
      )
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      a86854d0
    • Kees Cook's avatar
      treewide: kzalloc() -> kcalloc() · 6396bb22
      Kees Cook authored
      The kzalloc() function has a 2-factor argument form, kcalloc(). This
      patch replaces cases of:
      
              kzalloc(a * b, gfp)
      
      with:
              kcalloc(a * b, gfp)
      
      as well as handling cases of:
      
              kzalloc(a * b * c, gfp)
      
      with:
      
              kzalloc(array3_size(a, b, c), gfp)
      
      as it's slightly less ugly than:
      
              kzalloc_array(array_size(a, b), c, gfp)
      
      This does, however, attempt to ignore constant size factors like:
      
              kzalloc(4 * 1024, gfp)
      
      though any constants defined via macros get caught up in the conversion.
      
      Any factors with a sizeof() of "unsigned char", "char", and "u8" were
      dropped, since they're redundant.
      
      The Coccinelle script used for this was:
      
      // Fix redundant parens around sizeof().
      @@
      type TYPE;
      expression THING, E;
      @@
      
      (
        kzalloc(
      -	(sizeof(TYPE)) * E
      +	sizeof(TYPE) * E
        , ...)
      |
        kzalloc(
      -	(sizeof(THING)) * E
      +	sizeof(THING) * E
        , ...)
      )
      
      // Drop single-byte sizes and redundant parens.
      @@
      expression COUNT;
      typedef u8;
      typedef __u8;
      @@
      
      (
        kzalloc(
      -	sizeof(u8) * (COUNT)
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(__u8) * (COUNT)
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(char) * (COUNT)
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(unsigned char) * (COUNT)
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(u8) * COUNT
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(__u8) * COUNT
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(char) * COUNT
      +	COUNT
        , ...)
      |
        kzalloc(
      -	sizeof(unsigned char) * COUNT
      +	COUNT
        , ...)
      )
      
      // 2-factor product with sizeof(type/expression) and identifier or constant.
      @@
      type TYPE;
      expression THING;
      identifier COUNT_ID;
      constant COUNT_CONST;
      @@
      
      (
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * (COUNT_ID)
      +	COUNT_ID, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * COUNT_ID
      +	COUNT_ID, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * (COUNT_CONST)
      +	COUNT_CONST, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * COUNT_CONST
      +	COUNT_CONST, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * (COUNT_ID)
      +	COUNT_ID, sizeof(THING)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * COUNT_ID
      +	COUNT_ID, sizeof(THING)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * (COUNT_CONST)
      +	COUNT_CONST, sizeof(THING)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * COUNT_CONST
      +	COUNT_CONST, sizeof(THING)
        , ...)
      )
      
      // 2-factor product, only identifiers.
      @@
      identifier SIZE, COUNT;
      @@
      
      - kzalloc
      + kcalloc
        (
      -	SIZE * COUNT
      +	COUNT, SIZE
        , ...)
      
      // 3-factor product with 1 sizeof(type) or sizeof(expression), with
      // redundant parens removed.
      @@
      expression THING;
      identifier STRIDE, COUNT;
      type TYPE;
      @@
      
      (
        kzalloc(
      -	sizeof(TYPE) * (COUNT) * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE) * (COUNT) * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE) * COUNT * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE) * COUNT * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(TYPE))
        , ...)
      |
        kzalloc(
      -	sizeof(THING) * (COUNT) * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        kzalloc(
      -	sizeof(THING) * (COUNT) * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        kzalloc(
      -	sizeof(THING) * COUNT * (STRIDE)
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      |
        kzalloc(
      -	sizeof(THING) * COUNT * STRIDE
      +	array3_size(COUNT, STRIDE, sizeof(THING))
        , ...)
      )
      
      // 3-factor product with 2 sizeof(variable), with redundant parens removed.
      @@
      expression THING1, THING2;
      identifier COUNT;
      type TYPE1, TYPE2;
      @@
      
      (
        kzalloc(
      -	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
        , ...)
      |
        kzalloc(
      -	sizeof(THING1) * sizeof(THING2) * COUNT
      +	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
        , ...)
      |
        kzalloc(
      -	sizeof(THING1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE1) * sizeof(THING2) * COUNT
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
        , ...)
      |
        kzalloc(
      -	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
      +	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
        , ...)
      )
      
      // 3-factor product, only identifiers, with redundant parens removed.
      @@
      identifier STRIDE, SIZE, COUNT;
      @@
      
      (
        kzalloc(
      -	(COUNT) * STRIDE * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	COUNT * (STRIDE) * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	COUNT * STRIDE * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	(COUNT) * (STRIDE) * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	COUNT * (STRIDE) * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	(COUNT) * STRIDE * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	(COUNT) * (STRIDE) * (SIZE)
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      |
        kzalloc(
      -	COUNT * STRIDE * SIZE
      +	array3_size(COUNT, STRIDE, SIZE)
        , ...)
      )
      
      // Any remaining multi-factor products, first at least 3-factor products,
      // when they're not all constants...
      @@
      expression E1, E2, E3;
      constant C1, C2, C3;
      @@
      
      (
        kzalloc(C1 * C2 * C3, ...)
      |
        kzalloc(
      -	(E1) * E2 * E3
      +	array3_size(E1, E2, E3)
        , ...)
      |
        kzalloc(
      -	(E1) * (E2) * E3
      +	array3_size(E1, E2, E3)
        , ...)
      |
        kzalloc(
      -	(E1) * (E2) * (E3)
      +	array3_size(E1, E2, E3)
        , ...)
      |
        kzalloc(
      -	E1 * E2 * E3
      +	array3_size(E1, E2, E3)
        , ...)
      )
      
      // And then all remaining 2 factors products when they're not all constants,
      // keeping sizeof() as the second factor argument.
      @@
      expression THING, E1, E2;
      type TYPE;
      constant C1, C2, C3;
      @@
      
      (
        kzalloc(sizeof(THING) * C2, ...)
      |
        kzalloc(sizeof(TYPE) * C2, ...)
      |
        kzalloc(C1 * C2 * C3, ...)
      |
        kzalloc(C1 * C2, ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * (E2)
      +	E2, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(TYPE) * E2
      +	E2, sizeof(TYPE)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * (E2)
      +	E2, sizeof(THING)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	sizeof(THING) * E2
      +	E2, sizeof(THING)
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	(E1) * E2
      +	E1, E2
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	(E1) * (E2)
      +	E1, E2
        , ...)
      |
      - kzalloc
      + kcalloc
        (
      -	E1 * E2
      +	E1, E2
        , ...)
      )
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      6396bb22
  6. 06 Jun, 2018 6 commits
  7. 18 May, 2018 1 commit
    • Al Stone's avatar
      mailbox: PCC: erroneous error message when parsing ACPI PCCT · 8f8027c5
      Al Stone authored
      There have been multiple reports of the following error message:
      
      [    0.068293] Error parsing PCC subspaces from PCCT
      
      This error message is not correct.  In multiple cases examined, the PCCT
      (Platform Communications Channel Table) concerned is actually properly
      constructed; the problem is that acpi_pcc_probe() which reads the PCCT
      is making the assumption that the only valid PCCT is one that contains
      subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
      ACPI_PCCT_TYPE_HW_REDUCED_TYPE2.  The number of subtables of these
      types are counted and as long as there is at least one of the desired
      types, the acpi_pcc_probe() succeeds.  When no subtables of these types
      are found, regardless of whether or not any other subtable types are
      present, the error mentioned above is reported.
      
      In the cases reported to me personally, the PCCT contains exactly one
      subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE.  The function
      acpi_pcc_probe() does not count it as a valid subtable, so believes
      there to be no valid subtables, and hence outputs the error message.
      
      An example of the PCCT being reported as erroneous yet perfectly fine
      is the following:
      
                          Signature : "PCCT"
                       Table Length : 0000006E
                           Revision : 05
                           Checksum : A9
                             Oem ID : "XXXXXX"
                       Oem Table ID : "XXXXX   "
                       Oem Revision : 00002280
                    Asl Compiler ID : "XXXX"
              Asl Compiler Revision : 00000002
      
              Flags (decoded below) : 00000001
                           Platform : 1
                           Reserved : 0000000000000000
      
                      Subtable Type : 00 [Generic Communications Subspace]
                             Length : 3E
      
                           Reserved : 000000000000
                       Base Address : 00000000DCE43018
                     Address Length : 0000000000001000
      
                  Doorbell Register : [Generic Address Structure]
                           Space ID : 01 [SystemIO]
                          Bit Width : 08
                         Bit Offset : 00
               Encoded Access Width : 01 [Byte Access:8]
                            Address : 0000000000001842
      
                      Preserve Mask : 00000000000000FD
                         Write Mask : 0000000000000002
                    Command Latency : 00001388
                Maximum Access Rate : 00000000
            Minimum Turnaround Time : 0000
      
      To fix this, we count up all of the possible subtable types for the
      PCCT, and only report an error when there are none (which could mean
      either no subtables, or no valid subtables), or there are too many.
      We also change the logic so that if there is a valid subtable, we
      do try to initialize it per the PCCT subtable contents.  This is a
      change in functionality; previously, the probe would have returned
      right after the error message and would not have tried to use any
      other subtable definition.
      
      Tested on my personal laptop which showed the error previously; the
      error message no longer appears and the laptop appears to operate
      normally.
      Signed-off-by: default avatarAl Stone <ahs3@redhat.com>
      Reviewed-by: default avatarPrashanth Prakash <pprakash@codeaurora.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      8f8027c5
  8. 20 Mar, 2018 1 commit
    • Kaihua Zhong's avatar
      mailbox: Add support for Hi3660 mailbox · 41c0e939
      Kaihua Zhong authored
      Hi3660 mailbox controller is used to send message within multiple
      processors, MCU, HIFI, etc.  It supports 32 mailbox channels and every
      channel can only be used for single transferring direction.  Once the
      channel is enabled, it needs to specify the destination interrupt and
      acknowledge interrupt, these two interrupt vectors are used to create
      the connection between the mailbox and interrupt controllers.
      
      The data transferring supports two modes, one is named as "automatic
      acknowledge" mode so after send message the kernel doesn't need to wait
      for acknowledge from remote and directly return; there have another mode
      is to rely on handling interrupt for acknowledge.
      
      This commit is for initial version driver, which only supports
      "automatic acknowledge" mode to support CPU clock, which is the only
      one consumer to use mailbox and has been verified.  Later may enhance
      this driver for interrupt mode (e.g. for supporting HIFI).
      Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
      Signed-off-by: default avatarRuyi Wang <wangruyi@huawei.com>
      Signed-off-by: default avatarKaihua Zhong <zhongkaihua@huawei.com>
      Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
      41c0e939
  9. 15 Mar, 2018 2 commits
  10. 11 Feb, 2018 1 commit
    • Linus Torvalds's avatar
      vfs: do bulk POLL* -> EPOLL* replacement · a9a08845
      Linus Torvalds authored
      This is the mindless scripted replacement of kernel use of POLL*
      variables as described by Al, done by this script:
      
          for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
              L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
              for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
          done
      
      with de-mangling cleanups yet to come.
      
      NOTE! On almost all architectures, the EPOLL* constants have the same
      values as the POLL* constants do.  But they keyword here is "almost".
      For various bad reasons they aren't the same, and epoll() doesn't
      actually work quite correctly in some cases due to this on Sparc et al.
      
      The next patch from Al will sort out the final differences, and we
      should be all done.
      Scripted-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a9a08845
  11. 04 Feb, 2018 2 commits
  12. 10 Jan, 2018 2 commits
  13. 28 Nov, 2017 1 commit
  14. 14 Nov, 2017 3 commits
    • Arvind Yadav's avatar
      mailbox/omap: unregister mbox class · 1f90a216
      Arvind Yadav authored
      platform_driver_register() can fail here and we must unregister mbox
      class.
      Signed-off-by: default avatarArvind Yadav <arvind.yadav.cs@gmail.com>
      Acked-by: default avatarSuman Anna <s-anna@ti.com>
      Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
      1f90a216
    • Sudeep Holla's avatar
      mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready · e339c80a
      Sudeep Holla authored
      Currently we rely on the first byte of the Rx buffer to check if there's
      any data available to be read. If the first byte of the received buffer
      is zero (i.e. null character), then we fail to signal that data is
      available even when it's available.
      
      Instead introduce a boolean variable to track the data availability and
      update it in the channel receive callback as ready and clear it when the
      data is read.
      Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
      Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
      e339c80a
    • Sudeep Holla's avatar
      mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdone · 33cd7123
      Sudeep Holla authored
      Currently the mailbox framework sets txdone_method to TXDONE_BY_POLL if
      the controller sets txdone_by_poll. However some clients can have a
      mechanism to do TXDONE_BY_ACK which they can specify by knows_txdone.
      However, we endup setting both TXDONE_BY_POLL and TXDONE_BY_ACK in that
      case. In such scenario, we may end up with below warnings as the tx
      ticker is run both by mailbox framework and the client.
      
      WARNING: CPU: 1 PID: 0 at kernel/time/hrtimer.c:805 hrtimer_forward+0x88/0xd8
      CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.12.0-rc5 #242
      Hardware name: ARM LTD ARM Juno Development Platform
      task: ffff8009768ca700 task.stack: ffff8009768f8000
      PC is at hrtimer_forward+0x88/0xd8
      LR is at txdone_hrtimer+0xd4/0xf8
      Call trace:
       hrtimer_forward+0x88/0xd8
       __hrtimer_run_queues+0xe4/0x158
       hrtimer_interrupt+0xa4/0x220
       arch_timer_handler_phys+0x30/0x40
       handle_percpu_devid_irq+0x78/0x130
       generic_handle_irq+0x24/0x38
       __handle_domain_irq+0x5c/0xb8
       gic_handle_irq+0x54/0xa8
      
      This patch fixes the issue by resetting TXDONE_BY_POLL if client has set
      knows_txdone.
      
      Cc: Alexey Klimov <alexey.klimov@arm.com>
      Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
      Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
      33cd7123
  15. 08 Nov, 2017 1 commit
  16. 06 Nov, 2017 1 commit
    • Kees Cook's avatar
      mailbox: Convert timers to use timer_setup() · c6f15047
      Kees Cook authored
      In preparation for unconditionally passing the struct timer_list pointer to
      all timer callbacks, switch to using the new timer_setup() and from_timer()
      to pass the timer pointer explicitly.
      
      Cc: Ley Foon Tan <lftan@altera.com>
      Cc: Jassi Brar <jassisinghbrar@gmail.com>
      Cc: nios2-dev@lists.rocketboards.org
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      c6f15047