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SubjectRe: [RESEND PATCH v2 2/3] mtd: spi-nor: parse SFDP Sector Map Parameter Table
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On 08/27/2018 12:26 PM, Tudor Ambarus wrote:
[...]
> +static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt)
> +{
> + const u32 *ret = NULL;
> + u32 i, addr;
> + int err;
> + u8 addr_width, read_opcode, read_dummy;
> + u8 read_data_mask, data_byte, map_id;
> +
> + addr_width = nor->addr_width;
> + read_dummy = nor->read_dummy;
> + read_opcode = nor->read_opcode;
> +
> + map_id = 0;
> + i = 0;
> + /* Determine if there are any optional Detection Command Descriptors */
> + while (!(smpt[i] & SMPT_DESC_TYPE_MAP)) {
> + read_data_mask = SMPT_CMD_READ_DATA(smpt[i]);
> + nor->addr_width = spi_nor_smpt_addr_width(nor, smpt[i]);
> + nor->read_dummy = spi_nor_smpt_read_dummy(nor, smpt[i]);
> + nor->read_opcode = SMPT_CMD_OPCODE(smpt[i]);
> + addr = smpt[i + 1];
> +
> + err = spi_nor_read_raw(nor, addr, 1, &data_byte);
> + if (err)
> + goto out;
> +
> + /*
> + * Build an index value that is used to select the Sector Map
> + * Configuration that is currently in use.
> + */
> + map_id = map_id << 1 | (!(data_byte & read_data_mask) ? 0 : 1);

You can drop the ternary operator part completely ^

> + i = i + 2;
> + }
> +
> + /* Find the matching configuration map */
> + while (SMPT_MAP_ID(smpt[i]) != map_id) {
> + if (smpt[i] & SMPT_DESC_END)
> + goto out;
> + /* increment the table index to the next map */
> + i += SMPT_MAP_REGION_COUNT(smpt[i]) + 1;
> + }
> +
> + ret = smpt + i;
> + /* fall through */
> +out:
> + nor->addr_width = addr_width;
> + nor->read_dummy = read_dummy;
> + nor->read_opcode = read_opcode;
> + return ret;
> +}
> +
> +static void
> +spi_nor_region_check_overlay(struct spi_nor_erase_region *region,
> + const struct spi_nor_erase_type *erase,
> + const u8 erase_type)
> +{
> + int i;
> +
> + for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
> + if (!(erase_type & BIT(i)))
> + continue;
> + if (region->size & erase[i].size_mask) {
> + spi_nor_region_mark_overlay(region);
> + return;
> + }
> + }
> +}
> +
> +static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
> + const u32 *smpt)
> +{
> + struct spi_nor_erase_map *map = &nor->erase_map;
> + const struct spi_nor_erase_type *erase = map->erase_type;
> + struct spi_nor_erase_region *region;
> + u64 offset;
> + u32 region_count;
> + int i, j;
> + u8 erase_type;
> +
> + region_count = SMPT_MAP_REGION_COUNT(*smpt);
> + region = devm_kcalloc(nor->dev, region_count, sizeof(*region),
> + GFP_KERNEL);

Is this memory always correctly free'd ?

--
Best regards,
Marek Vasut

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