linux-kernel - [PATCH] r8169: initialize rtl8169

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Message-ID: <20140225011228.GC14970@merlin.infradead.org>
Date:	Mon, 24 Feb 2014 20:12:28 -0500
From:	Kyle McMartin <kyle@...radead.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Realtek linux nic maintainers <nic_swsd@...ltek.com>,
	Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] r8169: initialize rtl8169_stats seqlock

From: Kyle McMartin <kyle@...hat.com>

Boris reports he's seeing:
> [    9.195943] INFO: trying to register non-static key.
> [    9.196031] the code is fine but needs lockdep annotation.
> [    9.196031] turning off the locking correctness validator.
> [    9.196031] CPU: 1 PID: 933 Comm: modprobe Not tainted 3.14.0-rc4+ #1
with the r8169 driver.

These are occuring because the seqcount embedded in u64_stats_sync on
32-bit SMP is uninitialized which is making lockdep unhappy.

Signed-off-by: Kyle McMartin <kyle@...hat.com>

---

Patch is only compile tested by me, as these initializers will disappear
on 64-bit.

--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -7118,6 +7118,8 @@ rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	mutex_init(&tp->wk.mutex);
+	u64_stats_init(&tp->rx_stats.syncp);
+	u64_stats_init(&tp->tx_stats.syncp);
 
 	/* Get MAC address */
 	for (i = 0; i < ETH_ALEN; i++)
--
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