2024-01-03 11:57:28 +00:00
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From 401df0d4f4098ecc9c5278da2f50756d62e5b37d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Tue, 19 Dec 2023 13:01:03 +0100
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Subject: [PATCH] nvmem: layouts: refactor .add_cells() callback arguments
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Simply pass whole "struct nvmem_layout" instead of single variables.
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There is nothing in "struct nvmem_layout" that we have to hide from
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layout drivers. They also access it during .probe() and .remove().
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Thanks to this change:
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1. API gets more consistent
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All layouts drivers callbacks get the same argument
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2. Layouts get correct device
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Before this change NVMEM core code was passing NVMEM device instead
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of layout device. That resulted in:
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* Confusing prints
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* Calling devm_*() helpers on wrong device
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* Helpers like of_device_get_match_data() dereferencing NULLs
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3. It gets possible to get match data
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First of all nvmem_layout_get_match_data() requires passing "struct
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nvmem_layout" which .add_cells() callback didn't have before this. It
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doesn't matter much as it's rather useless now anyway (and will be
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dropped).
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What's more important however is that of_device_get_match_data() can
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be used now thanks to owning a proper device pointer.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Reviewed-by: Michael Walle <michael@walle.cc>
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Link: https://lore.kernel.org/r/20231219120104.3422-1-zajec5@gmail.com
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/nvmem/core.c | 2 +-
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drivers/nvmem/layouts/onie-tlv.c | 4 +++-
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drivers/nvmem/layouts/sl28vpd.c | 4 +++-
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include/linux/nvmem-provider.h | 2 +-
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4 files changed, 8 insertions(+), 4 deletions(-)
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--- a/drivers/nvmem/core.c
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+++ b/drivers/nvmem/core.c
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2024-07-18 20:15:36 +00:00
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@@ -853,7 +853,7 @@ int nvmem_layout_register(struct nvmem_l
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2024-01-03 11:57:28 +00:00
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return -EINVAL;
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/* Populate the cells */
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- ret = layout->add_cells(&layout->nvmem->dev, layout->nvmem);
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+ ret = layout->add_cells(layout);
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if (ret)
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return ret;
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--- a/drivers/nvmem/layouts/onie-tlv.c
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+++ b/drivers/nvmem/layouts/onie-tlv.c
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@@ -182,8 +182,10 @@ static bool onie_tlv_crc_is_valid(struct
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return true;
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}
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-static int onie_tlv_parse_table(struct device *dev, struct nvmem_device *nvmem)
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+static int onie_tlv_parse_table(struct nvmem_layout *layout)
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{
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+ struct nvmem_device *nvmem = layout->nvmem;
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+ struct device *dev = &layout->dev;
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struct onie_tlv_hdr hdr;
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size_t table_len, data_len, hdr_len;
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u8 *table, *data;
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--- a/drivers/nvmem/layouts/sl28vpd.c
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+++ b/drivers/nvmem/layouts/sl28vpd.c
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@@ -80,8 +80,10 @@ static int sl28vpd_v1_check_crc(struct d
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return 0;
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}
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-static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem)
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+static int sl28vpd_add_cells(struct nvmem_layout *layout)
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{
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+ struct nvmem_device *nvmem = layout->nvmem;
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+ struct device *dev = &layout->dev;
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const struct nvmem_cell_info *pinfo;
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struct nvmem_cell_info info = {0};
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struct device_node *layout_np;
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--- a/include/linux/nvmem-provider.h
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+++ b/include/linux/nvmem-provider.h
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@@ -173,7 +173,7 @@ struct nvmem_cell_table {
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struct nvmem_layout {
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struct device dev;
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struct nvmem_device *nvmem;
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- int (*add_cells)(struct device *dev, struct nvmem_device *nvmem);
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+ int (*add_cells)(struct nvmem_layout *layout);
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};
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struct nvmem_layout_driver {
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