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nvmem: core: update raw_len if the bit reading is required

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[ Upstream commit 6786484223d5705bf7f919c1e5055d478ebeec32 ]

If NVMEM cell uses bit offset or specifies bit truncation, update
raw_len manually (following the cell->bytes update), ensuring that the
NVMEM access is still word-aligned.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20250411112251.68002-11-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Baryshkov
2025-04-11 12:22:48 +01:00
committed by Greg Kroah-Hartman
parent 497f19cacb
commit 35d77c8d88
1 changed files with 3 additions and 1 deletions
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4
drivers/nvmem/core.c
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@@ -456,9 +456,11 @@ static int nvmem_cell_info_to_nvmem_cell_entry_nodup(struct nvmem_device *nvmem,
cell->nbits = info->nbits;
cell->np = info->np;
if (cell->nbits)
if (cell->nbits) {
cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,
BITS_PER_BYTE);
cell->raw_len = ALIGN(cell->bytes, nvmem->word_size);
}
if (!IS_ALIGNED(cell->offset, nvmem->stride)) {
dev_err(&nvmem->dev,