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From: Jakub Kicinski <kuba@kernel.org>
To: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: davem@davemloft.net, Grzegorz Siwik <grzegorz.siwik@intel.com>,
	netdev@vger.kernel.org, sassmann@redhat.com,
	Dave Switzer <david.switzer@intel.com>
Subject: Re: [PATCH net-next 2/6] igb: Add double-check MTA_REGISTER for i210 and i211
Date: Fri, 16 Apr 2021 14:12:47 -0700	[thread overview]
Message-ID: <20210416141247.7a8048ad@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> (raw)
In-Reply-To: <20210416204500.2012073-3-anthony.l.nguyen@intel.com>

On Fri, 16 Apr 2021 13:44:56 -0700 Tony Nguyen wrote:
> +	bool is_failed;
> +	int i;
> +
> +	do {
> +		is_failed = false;
> +		for (i = hw->mac.mta_reg_count - 1; i >= 0; i--) {
> +			if (array_rd32(E1000_MTA, i) != hw->mac.mta_shadow[i]) {
> +				is_failed = true;
> +				array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
> +				wrfl();
> +				break;
> +			}
> +		}
> +	} while (is_failed);

Looks like a potential infinite loop on persistent failure.
Also you don't need "is_failed", you can use while (i >= 0), or
assign i = hw->mac.mta_reg_count, or consider using a goto. 

  reply	other threads:[~2021-04-16 21:12 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16 20:44 [PATCH net-next 0/6][pull request] 1GbE Intel Wired LAN Driver Updates 2021-04-16 Tony Nguyen
2021-04-16 20:44 ` [PATCH net-next 1/6] igb: Redistribute memory for transmit packet buffers when in Qav mode Tony Nguyen
2021-04-16 20:44 ` [PATCH net-next 2/6] igb: Add double-check MTA_REGISTER for i210 and i211 Tony Nguyen
2021-04-16 21:12   ` Jakub Kicinski [this message]
2021-04-20 16:22     ` Nguyen, Anthony L
2021-05-10 13:43       ` Nick Lowe
2021-05-10 14:01         ` Nick Lowe
2021-05-13 12:19         ` Siwik, Grzegorz
2021-04-16 20:44 ` [PATCH net-next 3/6] igc: Enable internal i225 PPS Tony Nguyen
2021-04-16 20:44 ` [PATCH net-next 4/6] igc: enable auxiliary PHC functions for the i225 Tony Nguyen
2021-04-16 20:44 ` [PATCH net-next 5/6] igc: Fix overwrites return value Tony Nguyen
2021-04-16 20:45 ` [PATCH net-next 6/6] igc: Expose LPI counters Tony Nguyen
2021-04-17  0:20 ` [PATCH net-next 0/6][pull request] 1GbE Intel Wired LAN Driver Updates 2021-04-16 patchwork-bot+netdevbpf

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