diff options
Diffstat (limited to 'target/linux/generic/pending-6.6/450-09-block-partitions-populate-fwnode.patch')
| -rw-r--r-- | target/linux/generic/pending-6.6/450-09-block-partitions-populate-fwnode.patch | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/target/linux/generic/pending-6.6/450-09-block-partitions-populate-fwnode.patch b/target/linux/generic/pending-6.6/450-09-block-partitions-populate-fwnode.patch new file mode 100644 index 0000000000..8aa5cba678 --- /dev/null +++ b/target/linux/generic/pending-6.6/450-09-block-partitions-populate-fwnode.patch @@ -0,0 +1,77 @@ +From 614f4f6fdda09e30ecf7ef6c8091579db15018cb Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Fri, 21 Jul 2023 17:51:03 +0100 +Subject: [PATCH 09/15] block: partitions: populate fwnode + +Let block partitions to be represented by a firmware node and hence +allow them to being referenced e.g. for use with blk-nvmem. + +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +--- + block/partitions/core.c | 41 +++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 41 insertions(+) + +--- a/block/partitions/core.c ++++ b/block/partitions/core.c +@@ -10,6 +10,8 @@ + #include <linux/ctype.h> + #include <linux/vmalloc.h> + #include <linux/raid/detect.h> ++#include <linux/property.h> ++ + #include "check.h" + + static int (*check_part[])(struct parsed_partitions *) = { +@@ -298,6 +300,43 @@ static ssize_t whole_disk_show(struct de + } + static DEVICE_ATTR(whole_disk, 0444, whole_disk_show, NULL); + ++static struct fwnode_handle *find_partition_fwnode(struct block_device *bdev) ++{ ++ struct fwnode_handle *fw_parts, *fw_part; ++ struct device *ddev = disk_to_dev(bdev->bd_disk); ++ const char *partname, *uuid; ++ u32 partno; ++ ++ fw_parts = device_get_named_child_node(ddev, "partitions"); ++ if (!fw_parts) ++ fw_parts = device_get_named_child_node(ddev->parent, "partitions"); ++ ++ if (!fw_parts) ++ return NULL; ++ ++ fwnode_for_each_child_node(fw_parts, fw_part) { ++ if (!fwnode_property_read_string(fw_part, "uuid", &uuid) && ++ (!bdev->bd_meta_info || strncmp(uuid, ++ bdev->bd_meta_info->uuid, ++ PARTITION_META_INFO_UUIDLTH))) ++ continue; ++ ++ if (!fwnode_property_read_string(fw_part, "partname", &partname) && ++ (!bdev->bd_meta_info || strncmp(partname, ++ bdev->bd_meta_info->volname, ++ PARTITION_META_INFO_VOLNAMELTH))) ++ continue; ++ ++ if (!fwnode_property_read_u32(fw_part, "partno", &partno) && ++ bdev->bd_partno != partno) ++ continue; ++ ++ return fw_part; ++ } ++ ++ return NULL; ++} ++ + /* + * Must be called either with open_mutex held, before a disk can be opened or + * after all disk users are gone. +@@ -380,6 +419,8 @@ static struct block_device *add_partitio + goto out_put; + } + ++ device_set_node(pdev, find_partition_fwnode(bdev)); ++ + /* delay uevent until 'holders' subdir is created */ + dev_set_uevent_suppress(pdev, 1); + err = device_add(pdev); |