linux-kernel - [PATCH 5.4 72/86] sh_eth: Fix power down vs. is

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Date:   Mon, 25 Jan 2021 19:39:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.4 72/86] sh_eth: Fix power down vs. is_opened flag ordering

From: Geert Uytterhoeven <geert+renesas@...der.be>

commit f6a2e94b3f9d89cb40771ff746b16b5687650cbb upstream.

sh_eth_close() does a synchronous power down of the device before
marking it closed.  Revert the order, to make sure the device is never
marked opened while suspended.

While at it, use pm_runtime_put() instead of pm_runtime_put_sync(), as
there is no reason to do a synchronous power down.

Fixes: 7fa2955ff70ce453 ("sh_eth: Fix sleeping function called from invalid context")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@...il.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Link: https://lore.kernel.org/r/20210118150812.796791-1-geert+renesas@glider.be
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/renesas/sh_eth.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2640,10 +2640,10 @@ static int sh_eth_close(struct net_devic
 	/* Free all the skbuffs in the Rx queue and the DMA buffer. */
 	sh_eth_ring_free(ndev);
 
-	pm_runtime_put_sync(&mdp->pdev->dev);
-
 	mdp->is_opened = 0;
 
+	pm_runtime_put(&mdp->pdev->dev);
+
 	return 0;
 }