From 401df0d4f4098ecc9c5278da2f50756d62e5b37d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= 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 Reviewed-by: Miquel Raynal Reviewed-by: Michael Walle Link: https://lore.kernel.org/r/20231219120104.3422-1-zajec5@gmail.com Signed-off-by: Greg Kroah-Hartman --- 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 {