diff options
| author | Saravana Kannan <saravanak@google.com> | 2023-02-06 17:42:04 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-08 13:37:55 +0100 |
| commit | fb42378dcc7f247df56f0ecddfdae85487495fbc (patch) | |
| tree | 9b806d58db1040d8216902e80fb15e8e0dddf638 /drivers/mtd | |
| parent | 96da4a99ce507bb98e2ba77018a2f91999c8c12b (diff) | |
mtd: mtdpart: Don't create platform device that'll never probe
These "nvmem-cells" platform devices never get probed because there's no
platform driver for it and it's never used anywhere else. So it's a
waste of memory. These devices also cause fw_devlink to block nvmem
consumers of "nvmem-cells" partition from probing because the supplier
device never probes.
So stop creating platform devices for nvmem-cells partitions to avoid
wasting memory and to avoid blocking probing of consumers.
Reported-by: Maxim Kiselev <bigunclemax@gmail.com>
Fixes: bcdf0315a61a ("mtd: call of_platform_populate() for MTD partitions")
Signed-off-by: Saravana Kannan <saravanak@google.com>
Tested-by: Maksim Kiselev <bigunclemax@gmail.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcom/sm7225-fairphone-fp4
Link: https://lore.kernel.org/r/20230207014207.1678715-13-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/mtdpart.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index d442fa94c872..85f5ee6f06fc 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -577,6 +577,7 @@ static int mtd_part_of_parse(struct mtd_info *master, { struct mtd_part_parser *parser; struct device_node *np; + struct device_node *child; struct property *prop; struct device *dev; const char *compat; @@ -594,6 +595,15 @@ static int mtd_part_of_parse(struct mtd_info *master, else np = of_get_child_by_name(np, "partitions"); + /* + * Don't create devices that are added to a bus but will never get + * probed. That'll cause fw_devlink to block probing of consumers of + * this partition until the partition device is probed. + */ + for_each_child_of_node(np, child) + if (of_device_is_compatible(child, "nvmem-cells")) + of_node_set_flag(child, OF_POPULATED); + of_property_for_each_string(np, "compatible", prop, compat) { parser = mtd_part_get_compatible_parser(compat); if (!parser) |