qemu/include/hw/i2c
Markus Armbruster f26740c61a smbus: Fix spd_data_generate() error API violation
The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL.  Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call.

spd_data_generate() can pass @errp to error_setg() more than once when
it adjusts both memory size and type.  Harmless, because no caller
passes anything that needs adjusting.  Until the previous commit,
sam460ex passed types that needed adjusting, but not sizes.

spd_data_generate()'s contract is rather awkward:

    If everything's fine, return non-null and don't set an error.

    Else, if memory size or type need adjusting, return non-null and
    set an error describing the adjustment.

    Else, return null and set an error reporting why no data can be
    generated.

Its callers treat the error as a warning even when null is returned.
They don't create the "smbus-eeprom" device then.  Suspicious.

Since the previous commit, only "everything's fine" can actually
happen.  Drop the unused code and simplify the callers.  This gets rid
of the error API violation.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200422134815.1584-3-armbru@redhat.com>
2020-04-29 08:01:52 +02:00
..
aspeed_i2c.h aspeed/i2c: Add support for DMA transfers 2019-12-16 10:46:34 +00:00
bitbang_i2c.h hw/i2c/bitbang_i2c: Use in-place rather than malloc'd bitbang_i2c_interface struct 2019-07-03 10:51:35 +02:00
i2c.h Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
imx_i2c.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
microbit_i2c.h arm: Stub out NRF51 TWI magnetometer/accelerometer detection 2019-01-29 11:46:03 +00:00
pm_smbus.h Include exec/memory.h slightly less 2019-08-16 13:31:52 +02:00
ppc4xx_i2c.h hw/i2c/bitbang_i2c: Use in-place rather than malloc'd bitbang_i2c_interface struct 2019-07-03 10:51:35 +02:00
smbus_eeprom.h smbus: Fix spd_data_generate() error API violation 2020-04-29 08:01:52 +02:00
smbus_master.h i2c: Split smbus into parts 2019-02-27 21:06:08 -06:00
smbus_slave.h i2c:smbus_slave: Add an SMBus vmstate structure 2019-02-27 21:06:08 -06:00