Re: [PATCH v3 6/7] PCI: xilinx-nwl: Add phy support

[Sean Anderson]

On 5/24/24 10:59, Dan Carpenter wrote:
> On Mon, May 20, 2024 at 10:54:01AM -0400, Sean Anderson wrote:
>> +static int nwl_pcie_phy_enable(struct nwl_pcie *pcie)
>> +{
>> +	int i, ret;
>> +
>> +	for (i = 0; i < ARRAY_SIZE(pcie->phy); i++) {
>> +		ret = phy_init(pcie->phy[i]);
>> +		if (ret)
>> +			goto err;
>> +
>> +		ret = phy_power_on(pcie->phy[i]);
>> +		if (ret) {
>> +			WARN_ON(phy_exit(pcie->phy[i]));
>> +			goto err;
>> +		}
>> +	}
>> +
>> +	return 0;
>> +
>> +err:
>> +	while (--i) {
> 
> This doesn't work.  If we fail on the first iteration, then it will
> lead to an array underflow.  It should be while (--i >= 0) or
> while (i--).  I prefer the first, but the second format works for people
> who use unsigned iterators.

Thanks, will fix.

--Sean

>> +		WARN_ON(phy_power_off(pcie->phy[i]));
>> +		WARN_ON(phy_exit(pcie->phy[i]));
>> +	}
>> +
>> +	return ret;
>> +}
> 
> regards,
> dan carpenter
>