spi: fix IDR collision on systems with both fixed and dynamic SPI bus numbers

Browse source

On systems where some controllers get a dynamic ID assigned and some have
a fixed number from DT, the current implemention might run into an IDR
collision if the dynamic controllers gets probed first and get an IDR number,
which is later requested by the controller with the fixed numbering. When
this happens the fixed controller will fail to register with the SPI core.

Fix this by skipping all known alias numbers when assigning the dynamic IDs.

Fixes: 9b61e30221 (spi: Pick spi bus number from Linux idr or spi alias)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

Lucas Stach 2017-10-16 12:27:58 +02:00 • committed by Mark Brown

parent 67f7b2781f

commit 42bdd7061a

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

1 changed files with 9 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

drivers/spi/spi.c

View file