[PATCH 00/31] hwmon: convert i2c_smbus_read_block_data() users to pass buffer length

[Dmitry Torokhov]

Convert all callers of i2c_smbus_read_block_data() across the hwmon
and PMBus subsystems to pass destination buffer sizes, adopting the
4-argument form introduced in commit 68f382641f8c ("i2c: smbus: make
i2c_smbus_read_block_data() safer").

For drivers that used intermediate bounce buffers (lineage-pem, lm93,
and pt5161l), redundant buffer allocations and memcpy() calls are
dropped so data is read directly into target structures.

For drivers performing string comparisons on the read data
(acbel-fsg032, bpa-rs600, ltc4286, max15301, pim4328, and stpddc60),
ensure the destination buffer is explicitly NUL-terminated before
comparison, and pass a length that reserves space for the terminator.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
Dmitry Torokhov (31):
      hwmon: (lineage-pem) use 4-argument i2c_smbus_read_block_data()
      hwmon: (lm93) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pt5161l) use 4-argument i2c_smbus_read_block_data()
      hwmon: (kb9002) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/acbel-fsg032) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/adm1266) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/aps-379) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/bpa-rs600) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/crps) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/d1u74t) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/dps920ab) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/fsp-3y) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/ibm-cffps) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/inspur-ipsps) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/ir35221) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/lt7182s) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/ltc4286) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/lx1308) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/max15301) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/max16601) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/max20730) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/mp5920) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/pim4328) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/pxe1610) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/q54sj108a2) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/stpddc60) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/tps53679) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/ucd9000) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/ucd9200) use 4-argument i2c_smbus_read_block_data()
      hwmon: (pmbus/zl6100) use 4-argument i2c_smbus_read_block_data()

 drivers/hwmon/kb9002.c             |  6 ++++--
 drivers/hwmon/lineage-pem.c        | 17 ++++++-----------
 drivers/hwmon/lm93.c               | 12 ++----------
 drivers/hwmon/pmbus/acbel-fsg032.c | 16 +++++++++-------
 drivers/hwmon/pmbus/adm1266.c      | 25 ++++++++++++++++---------
 drivers/hwmon/pmbus/aps-379.c      |  3 ++-
 drivers/hwmon/pmbus/bpa-rs600.c    |  5 +++--
 drivers/hwmon/pmbus/crps.c         |  5 +++--
 drivers/hwmon/pmbus/d1u74t.c       |  8 +++++---
 drivers/hwmon/pmbus/dps920ab.c     |  6 ++++--
 drivers/hwmon/pmbus/fsp-3y.c       |  3 ++-
 drivers/hwmon/pmbus/ibm-cffps.c    |  5 +++--
 drivers/hwmon/pmbus/inspur-ipsps.c |  4 ++--
 drivers/hwmon/pmbus/ir35221.c      |  6 ++++--
 drivers/hwmon/pmbus/lt7182s.c      |  6 ++++--
 drivers/hwmon/pmbus/ltc4286.c      |  8 ++++++--
 drivers/hwmon/pmbus/lx1308.c       |  9 ++++++---
 drivers/hwmon/pmbus/max15301.c     |  4 +++-
 drivers/hwmon/pmbus/max16601.c     |  7 ++++---
 drivers/hwmon/pmbus/max20730.c     |  9 ++++++---
 drivers/hwmon/pmbus/mp5920.c       |  3 ++-
 drivers/hwmon/pmbus/pim4328.c      |  4 +++-
 drivers/hwmon/pmbus/pmbus_core.c   |  3 ++-
 drivers/hwmon/pmbus/pxe1610.c      |  2 +-
 drivers/hwmon/pmbus/q54sj108a2.c   | 27 ++++++++++++++++++---------
 drivers/hwmon/pmbus/stpddc60.c     |  4 +++-
 drivers/hwmon/pmbus/tps53679.c     |  9 ++++++---
 drivers/hwmon/pmbus/ucd9000.c      |  8 +++++---
 drivers/hwmon/pmbus/ucd9200.c      |  4 ++--
 drivers/hwmon/pmbus/zl6100.c       |  2 +-
 drivers/hwmon/pt5161l.c            |  5 ++---
 31 files changed, 139 insertions(+), 96 deletions(-)
---
base-commit: 20a33c6b6cbe7e4805dfb6cd68816937443aa148
change-id: 20261022-hwmon-i2c-smbus-read-block-data-554b91958a09

Thanks.

-- 
Dmitry