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@xxxxxxxxxx>
---
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
