From: Stephen Hemminger <shemminger@vyatta.com>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Subject: [PATCH 4/9] sky2: hold spinlock around phy_power_down
Date: Fri, 14 Aug 2009 08:15:15 -0700 [thread overview]
Message-ID: <20090814151608.197690244@vyatta.com> (raw)
In-Reply-To: 20090814151511.992669598@vyatta.com
[-- Attachment #1: sky2-phy-lock.patch --]
[-- Type: text/plain, Size: 832 bytes --]
Avoid any possible problems with accessing PHY registers on shutdown.
This is a purely theoretical issue and is not related to any of the
outstanding bug reports. Since receiver and transmitter are already
shutdown and phy interrupts for this device are already disabled,
there should already be enough protection. Suggested by Mike McCormack.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
--- a/drivers/net/sky2.c 2009-08-14 07:58:45.736296852 -0700
+++ b/drivers/net/sky2.c 2009-08-14 07:58:46.664005121 -0700
@@ -1882,7 +1882,9 @@ static int sky2_down(struct net_device *
synchronize_irq(hw->pdev->irq);
napi_synchronize(&hw->napi);
+ spin_lock_bh(&sky2->phy_lock);
sky2_phy_power_down(hw, port);
+ spin_unlock_bh(&sky2->phy_lock);
/* turn off LED's */
sky2_write16(hw, B0_Y2LED, LED_STAT_OFF);
--
next prev parent reply other threads:[~2009-08-14 15:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-14 15:15 [PATCH 0/9] sky2: version 1.24 Stephen Hemminger
2009-08-14 15:15 ` [PATCH 1/9] sky2: Avoid rewinding sky2->tx_prod Stephen Hemminger
2009-08-14 15:15 ` [PATCH 2/9] sky2: Move tx reset functionality to sky2_tx_reset() Stephen Hemminger
2009-08-14 15:15 ` [PATCH 3/9] sky2: Reset tx train after interrupts disabled Stephen Hemminger
2009-08-14 15:15 ` Stephen Hemminger [this message]
2009-08-14 15:15 ` [PATCH 5/9] sky2: hold RTNL when doing suspend/shutdown operations Stephen Hemminger
2009-08-14 15:15 ` [PATCH 6/9] sky2: cleanup restart operations Stephen Hemminger
2009-08-14 15:15 ` [PATCH 7/9] sky2: lock less transmit completion Stephen Hemminger
2009-08-14 15:15 ` [PATCH 8/9] sky2: fix pause negotiation Stephen Hemminger
2009-08-14 15:15 ` [PATCH 9/9] sky2: version 1.24 Stephen Hemminger
2009-08-14 22:41 ` [PATCH 0/9] " David Miller
2009-08-14 23:33 ` [PATCH] sky2: remove restarting workaround flag Stephen Hemminger
2009-08-14 23:38 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090814151608.197690244@vyatta.com \
--to=shemminger@vyatta.com \
--cc=davem@davemloft.net \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).