static void tg3_get_nvram_info(struct tg3 *tp)
{
	u32 nvcfg1;

	nvcfg1 = tr32(NVRAM_CFG1);
	if (nvcfg1 & NVRAM_CFG1_FLASHIF_ENAB) {
		tg3_flag_set(tp, FLASH);
	} else {
		nvcfg1 &= ~NVRAM_CFG1_COMPAT_BYPASS;
		tw32(NVRAM_CFG1, nvcfg1);
	}

	if (tg3_asic_rev(tp) == ASIC_REV_5750 ||
	    tg3_flag(tp, 5780_CLASS)) {
		switch (nvcfg1 & NVRAM_CFG1_VENDOR_MASK) {
		case FLASH_VENDOR_ATMEL_FLASH_BUFFERED:
			tp->nvram_jedecnum = JEDEC_ATMEL;
			tp->nvram_pagesize = ATMEL_AT45DB0X1B_PAGE_SIZE;
			tg3_flag_set(tp, NVRAM_BUFFERED);
			break;
		case FLASH_VENDOR_ATMEL_FLASH_UNBUFFERED:
			tp->nvram_jedecnum = JEDEC_ATMEL;
			tp->nvram_pagesize = ATMEL_AT25F512_PAGE_SIZE;
			break;
		case FLASH_VENDOR_ATMEL_EEPROM:
			tp->nvram_jedecnum = JEDEC_ATMEL;
			tp->nvram_pagesize = ATMEL_AT24C512_CHIP_SIZE;
			tg3_flag_set(tp, NVRAM_BUFFERED);
			break;
		case FLASH_VENDOR_ST:
			tp->nvram_jedecnum = JEDEC_ST;
			tp->nvram_pagesize = ST_M45PEX0_PAGE_SIZE;
			tg3_flag_set(tp, NVRAM_BUFFERED);
			break;
		case FLASH_VENDOR_SAIFUN:
			tp->nvram_jedecnum = JEDEC_SAIFUN;
			tp->nvram_pagesize = SAIFUN_SA25F0XX_PAGE_SIZE;
			break;
		case FLASH_VENDOR_SST_SMALL:
		case FLASH_VENDOR_SST_LARGE:
			tp->nvram_jedecnum = JEDEC_SST;
			tp->nvram_pagesize = SST_25VF0X0_PAGE_SIZE;
			break;
		}
	} else {
		tp->nvram_jedecnum = JEDEC_ATMEL;
		tp->nvram_pagesize = ATMEL_AT45DB0X1B_PAGE_SIZE;
		tg3_flag_set(tp, NVRAM_BUFFERED);
	}
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.