From: Moritz Fischer <mdf@kernel.org>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, linux-parisc@vger.kernel.org,
linux-kernel@vger.kernel.org, lucyyan@google.com,
moritzf@google.com, James.Bottomley@hansenpartnership.com,
kuba@kernel.org, Moritz Fischer <mdf@kernel.org>
Subject: [PATCH net-next v4] net: dec: tulip: de2104x: Add shutdown handler to stop NIC
Date: Wed, 28 Oct 2020 10:21:25 -0700 [thread overview]
Message-ID: <20201028172125.496942-1-mdf@kernel.org> (raw)
The driver does not implement a shutdown handler which leads to issues
when using kexec in certain scenarios. The NIC keeps on fetching
descriptors which gets flagged by the IOMMU with errors like this:
DMAR: DMAR:[DMA read] Request device [5e:00.0]fault addr fffff000
DMAR: DMAR:[DMA read] Request device [5e:00.0]fault addr fffff000
DMAR: DMAR:[DMA read] Request device [5e:00.0]fault addr fffff000
DMAR: DMAR:[DMA read] Request device [5e:00.0]fault addr fffff000
DMAR: DMAR:[DMA read] Request device [5e:00.0]fault addr fffff000
Signed-off-by: Moritz Fischer <mdf@kernel.org>
---
Changes from v3:
- Added rtnl_lock()/unlock() as suggested by Jakub and use dev_close()
Changes from v2:
- Changed to net-next
- Removed extra whitespace
Changes from v1:
- Replace call to de_remove_one with de_shutdown() function
as suggested by James.
---
drivers/net/ethernet/dec/tulip/de2104x.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c b/drivers/net/ethernet/dec/tulip/de2104x.c
index d9f6c19940ef..c3cbe55205a7 100644
--- a/drivers/net/ethernet/dec/tulip/de2104x.c
+++ b/drivers/net/ethernet/dec/tulip/de2104x.c
@@ -2175,11 +2175,21 @@ static int __maybe_unused de_resume(struct device *dev_d)
static SIMPLE_DEV_PM_OPS(de_pm_ops, de_suspend, de_resume);
+static void de_shutdown(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+
+ rtnl_lock();
+ dev_close(dev);
+ rtnl_unlock();
+}
+
static struct pci_driver de_driver = {
.name = DRV_NAME,
.id_table = de_pci_tbl,
.probe = de_init_one,
.remove = de_remove_one,
+ .shutdown = de_shutdown,
.driver.pm = &de_pm_ops,
};
--
2.29.1
next reply other threads:[~2020-10-29 0:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 17:21 Moritz Fischer [this message]
2020-10-31 0:16 ` [PATCH net-next v4] net: dec: tulip: de2104x: Add shutdown handler to stop NIC Jakub Kicinski
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=20201028172125.496942-1-mdf@kernel.org \
--to=mdf@kernel.org \
--cc=James.Bottomley@hansenpartnership.com \
--cc=davem@davemloft.net \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-parisc@vger.kernel.org \
--cc=lucyyan@google.com \
--cc=moritzf@google.com \
--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).