Re: [PATCH -next] spi: Fix double IDR allocation with DT aliases
From: Fabio Estevam
Date: Mon Aug 27 2018 - 10:13:54 EST
On Tue, Aug 21, 2018 at 6:53 AM, Geert Uytterhoeven
> If the SPI bus number is provided by a DT alias, idr_alloc() is called
> twice, leading to:
> WARNING: CPU: 1 PID: 1 at drivers/spi/spi.c:2179 spi_register_controller+0x11c/0x5d8
> couldn't get idr
> Fix this by moving the handling of fixed SPI bus numbers up, before the
> DT handling code fills in ctlr->bus_num.
> Fixes: 1a4327fbf4554d5b ("spi: fix IDR collision on systems with both fixed and dynamic SPI bus numbers")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
This fixes SPI on imx51-babbage, thanks.
Tested-by: Fabio Estevam <fabio.estevam@xxxxxxx>