qla2x00_read_flash_byte(9)

💖 qla2x00_read_flash_byte(9) 💖

okay so bestie, welcome to the Kernel API Manual, section 9 — yes, the big-girl kernel section, we love her 🎀. This one's a tiny lil function with main character energy in qla_sup.c, and honestly? She ate. Let's get into it ✨

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✨ NAME ✨

qla2x00_read_flash_byte — literally just reads a single lil byte from flash 🦋

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🌸 SYNOPSIS 🌸

uint8_t qla2x00_read_flash_byte (struct qla_hw_data *ha , uint32_t addr );

ngl she's a short one. one return value, two args, no drama 💅

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🎀 ARGUMENTS 🎀

• ha — the HA context, iykyk 🫶 this is your hardware-data hookup, the whole vibe of the chip lives in here.
• addr — the address in flash you wanna read from. like, where in the flash. that's it, that's the arg 💜

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — the chip actually hands back a whole word, right? but here's the catch, and it's a big one: only the lower byte is valid. 😭 so like, don't get excited about the upper bits, they're giving nothing. lower byte only, periodt.

fr fr, only the lower byte is valid. the rest is not your business 💀

And then she just returns the byte read from flash addr — that's the whole job 🧚 cute, focused, iconic.

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🔥 SEE ALSO 🔥

the whole friend group 💖 all of these live in the kernel file ./drivers/scsi/qla2xxx/qla_sup.c:

• qla29xx_get_flt_layout(9)
• qla29xx_get_fdt_info(9)
• qla29xx_get_flash_region(9)
• set_segment_bits(9)
• set_chunk_bits(9)
• qla29xx_write_optrom_data(9)
• qla29xx_read_optrom_data(9)
• qla29xx_mpi_optrom_data(9)
• qla2x00_lock_nvram_access(9)
• qla2x00_unlock_nvram_access(9)
• qla2x00_nv_write(9)
• qla2x00_nvram_request(9)
• qla2x00_get_nvram_word(9)
• qla2x00_nv_deselect(9)
• qla2x00_write_nvram_word(9)
• qla2x00_clear_nvram_protection(9)
• qla2x00_flash_enable(9)
• qla2x00_flash_disable(9)
• qla2x00_write_flash_byte(9)
• qla2x00_poll_flash(9)
• qla2x00_program_flash_address(9)
• qla2x00_erase_flash(9)
• qla2x00_erase_flash_sector(9)
• qla2x00_get_flash_manufacturer(9)
• qla2x00_get_fcode_version(9)

like, go read the whole squad, they all fit together 🫶✨

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and that's the page, bestie! 🌈 this lil gem comes to you from ./drivers/scsi/qla2xxx and is dated October 2026 — take a screenshot, it's iconic 💅📸 qla2x00_read_flash_byte(9) out! 🎀