spi: Check conflicting CS based on spi->chip_select instead of device name

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Commit e13ac47bec (spi: Use stable dev_name for ACPI enumerated SPI
slaves) changed the SPI device naming to be based on ACPI device name
instead of carrying bus number and chip select for devices enumerated
from ACPI namespace.

In case of a buggy BIOS that lists multiple SPI devices sharing the same
chip select (even though they should use different) the current code fails
to detect that and allows the devices to be added to the bus.

Fix this by walking through the bus and comparing spi->chip_select instead
of device name. This should work regardless what the device name will be in
future.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

...

This commit is contained in:

Mika Westerberg 2014-01-09 15:23:55 +02:00 • committed by Mark Brown

parent e120cc0dcf

commit b6fb8d3a1f

1 changed files with 13 additions and 5 deletions

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drivers/spi/spi.c

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