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,
Moritz Fischer <mdf@kernel.org>
Subject: [PATCH/RFC net v2] net: dec: tulip: de2104x: Add shutdown handler to stop NIC
Date: Thu, 22 Oct 2020 19:45:20 -0700 [thread overview]
Message-ID: <20201023024520.626132-1-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 v1:
- Replace call to de_remove_one with de_shutdown() function
as suggested by James.
---
drivers/net/ethernet/dec/tulip/de2104x.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c b/drivers/net/ethernet/dec/tulip/de2104x.c
index f1a2da15dd0a..6de0cd6cf4ca 100644
--- a/drivers/net/ethernet/dec/tulip/de2104x.c
+++ b/drivers/net/ethernet/dec/tulip/de2104x.c
@@ -2180,11 +2180,19 @@ static int de_resume (struct pci_dev *pdev)
#endif /* CONFIG_PM */
+static void de_shutdown(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata (pdev);
+
+ de_close(dev);
+}
+
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,
#ifdef CONFIG_PM
.suspend = de_suspend,
.resume = de_resume,
--
2.28.0
next reply other threads:[~2020-10-23 2:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-23 2:45 Moritz Fischer [this message]
2020-10-23 20:08 ` [PATCH/RFC net v2] net: dec: tulip: de2104x: Add shutdown handler to stop NIC Jakub Kicinski
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