| Message ID | 20201028172125.496942-1-mdf@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [net-next,v4] net: dec: tulip: de2104x: Add shutdown handler to stop NIC | expand |
On Wed, 28 Oct 2020 10:21:25 -0700 Moritz Fischer wrote: > 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> Applied, thanks!
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, };
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(+)