Hi Ralf,
> On Oct 17, 2016, at 16:59 , Ralf Ramsauer <ralf@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Instantiated SPI device nodes are marked with OF_POPULATE. This was
> introduced in bd6c164. On unloading, loaded device nodes will of course
> be unmarked. The problem are nodes that fail during initialisation: If a
> node fails, it won't be unloaded and hence not be unmarked.
>
> If a SPI driver module is unloaded and reloaded, it will skip nodes that
> failed before.
>
> Skip device nodes that are already populated and mark them only in case
> of success.
>
> Note that the same issue exists for I2C.
>
> Fixes: bd6c164 ("spi: Mark instantiated device nodes with OF_POPULATE")
> Signed-off-by: Ralf Ramsauer <ralf@xxxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/spi/spi.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 5787b72..838783c 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -1618,9 +1618,11 @@ static void of_register_spi_devices(struct spi_master *master)
> if (of_node_test_and_set_flag(nc, OF_POPULATED))
> continue;
> spi = of_register_spi_device(master, nc);
> - if (IS_ERR(spi))
> + if (IS_ERR(spi)) {
> dev_warn(&master->dev, "Failed to create SPI device for %s\n",
> nc->full_name);
> + of_node_clear_flag(nc, OF_POPULATED);
> + }
> }
> }
> #else
> @@ -3131,6 +3133,7 @@ static int of_spi_notify(struct notifier_block *nb, unsigned long action,
> if (IS_ERR(spi)) {
> pr_err("%s: failed to create for '%s'\n",
> __func__, rd->dn->full_name);
> + of_node_clear_flag(rd->dn, OF_POPULATED);
> return notifier_from_errno(PTR_ERR(spi));
> }
> break;
> --
> 2.10.1
>
Thanks for this.
Acked-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
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