linux-kernel - Re: [PATCH v5 char-misc-next] misc: microchip: pci1xxxx: Add OTP/EEPROM driver for the pci1xxxx switch

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Date:   Mon, 13 Feb 2023 13:00:09 +0100
From:   Michael Walle <michael@...le.cc>
To:     tharunkumar.pasumarthi@...rochip.com
Cc:     gregkh@...uxfoundation.org, UNGLinuxDriver@...rochip.com,
        arnd@...db.de, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Michael Walle <michael@...le.cc>
Subject: Re: [PATCH v5 char-misc-next] misc: microchip: pci1xxxx: Add OTP/EEPROM driver for the pci1xxxx switch

>>> +	/* Wait for the EPC_BUSY bit to get cleared */
>>> +	do {
>>> +		data = readl(priv->reg_base + MMAP_EEPROM_OFFSET(EEPROM_CMD_REG));
>>> +	} while (data & EEPROM_CMD_EPC_BUSY_BIT);
>>
>> Again, you can not sit and spin in a busy-wait like this with no chance
>> to recover if something goes wrong with the hardware (hint, what if it
>> got removed?)

Also, it is good practice to CC people who did comments on the
former versions.

-michael