Hi Greg,
On Thu, Sep 27, 2018 at 10:03 AM, Greg Kroah-Hartman gregkh@linuxfoundation.org wrote:
4.14-stable review patch. If anyone has any objections, please let me know.
From: Kirill Kapranov kirill.kapranov@compulab.co.il
commit 1a4327fbf4554d5b78d75b19a13d40d6de220159 upstream.
On systems where some controllers get a dynamic ID assigned and some have a fixed number (e.g. from ACPI tables), the current implementation might run into an IDR collision: in case of a fixed bus number is gotten by a driver (but not marked busy in IDR tree) and a driver with dynamic bus number gets the same ID and predictably fails.
Fix this by means of checking-in fixed IDsin IDR as far as dynamic ones at the moment of the controller registration.
Fixes: 9b61e302210e (spi: Pick spi bus number from Linux idr or spi alias) Signed-off-by: Kirill Kapranov kirill.kapranov@compulab.co.il Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
There is another later patch which fixes this patch.
04b2d03a7565 ("spi: Fix double IDR allocation with DT aliases") , can you please add it to the release also..
-- Regards Sudip