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- From 401df0d4f4098ecc9c5278da2f50756d62e5b37d Mon Sep 17 00:00:00 2001
- From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
- Date: Tue, 19 Dec 2023 13:01:03 +0100
- Subject: [PATCH] nvmem: layouts: refactor .add_cells() callback arguments
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- Simply pass whole "struct nvmem_layout" instead of single variables.
- There is nothing in "struct nvmem_layout" that we have to hide from
- layout drivers. They also access it during .probe() and .remove().
- Thanks to this change:
- 1. API gets more consistent
- All layouts drivers callbacks get the same argument
- 2. Layouts get correct device
- Before this change NVMEM core code was passing NVMEM device instead
- of layout device. That resulted in:
- * Confusing prints
- * Calling devm_*() helpers on wrong device
- * Helpers like of_device_get_match_data() dereferencing NULLs
- 3. It gets possible to get match data
- First of all nvmem_layout_get_match_data() requires passing "struct
- nvmem_layout" which .add_cells() callback didn't have before this. It
- doesn't matter much as it's rather useless now anyway (and will be
- dropped).
- What's more important however is that of_device_get_match_data() can
- be used now thanks to owning a proper device pointer.
- Signed-off-by: Rafał Miłecki <[email protected]>
- Reviewed-by: Miquel Raynal <[email protected]>
- Reviewed-by: Michael Walle <[email protected]>
- Link: https://lore.kernel.org/r/[email protected]
- Signed-off-by: Greg Kroah-Hartman <[email protected]>
- ---
- drivers/nvmem/core.c | 2 +-
- drivers/nvmem/layouts/onie-tlv.c | 4 +++-
- drivers/nvmem/layouts/sl28vpd.c | 4 +++-
- include/linux/nvmem-provider.h | 2 +-
- 4 files changed, 8 insertions(+), 4 deletions(-)
- --- a/drivers/nvmem/core.c
- +++ b/drivers/nvmem/core.c
- @@ -855,7 +855,7 @@ int nvmem_layout_register(struct nvmem_l
- return -EINVAL;
-
- /* Populate the cells */
- - ret = layout->add_cells(&layout->nvmem->dev, layout->nvmem);
- + ret = layout->add_cells(layout);
- if (ret)
- return ret;
-
- --- a/drivers/nvmem/layouts/onie-tlv.c
- +++ b/drivers/nvmem/layouts/onie-tlv.c
- @@ -182,8 +182,10 @@ static bool onie_tlv_crc_is_valid(struct
- return true;
- }
-
- -static int onie_tlv_parse_table(struct device *dev, struct nvmem_device *nvmem)
- +static int onie_tlv_parse_table(struct nvmem_layout *layout)
- {
- + struct nvmem_device *nvmem = layout->nvmem;
- + struct device *dev = &layout->dev;
- struct onie_tlv_hdr hdr;
- size_t table_len, data_len, hdr_len;
- u8 *table, *data;
- --- a/drivers/nvmem/layouts/sl28vpd.c
- +++ b/drivers/nvmem/layouts/sl28vpd.c
- @@ -80,8 +80,10 @@ static int sl28vpd_v1_check_crc(struct d
- return 0;
- }
-
- -static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem)
- +static int sl28vpd_add_cells(struct nvmem_layout *layout)
- {
- + struct nvmem_device *nvmem = layout->nvmem;
- + struct device *dev = &layout->dev;
- const struct nvmem_cell_info *pinfo;
- struct nvmem_cell_info info = {0};
- struct device_node *layout_np;
- --- a/include/linux/nvmem-provider.h
- +++ b/include/linux/nvmem-provider.h
- @@ -173,7 +173,7 @@ struct nvmem_cell_table {
- struct nvmem_layout {
- struct device dev;
- struct nvmem_device *nvmem;
- - int (*add_cells)(struct device *dev, struct nvmem_device *nvmem);
- + int (*add_cells)(struct nvmem_layout *layout);
- };
-
- struct nvmem_layout_driver {
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