[PATCH/RFC net] net: dec: tulip: de2104x: Add shutdown handler to stop NIC

[Moritz Fischer]

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 <m...@kernel.org>
---

Hi all,

I'm not sure if this is the proper way for a shutdown handler,
I've tried to look at a bunch of examples and couldn't find a specific
solution, in my tests on hardware this works, though.

Open to suggestions.

Thanks,
Moritz

---
 drivers/net/ethernet/dec/tulip/de2104x.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c 
b/drivers/net/ethernet/dec/tulip/de2104x.c
index f1a2da15dd0a..372c62c7e60f 100644
--- a/drivers/net/ethernet/dec/tulip/de2104x.c
+++ b/drivers/net/ethernet/dec/tulip/de2104x.c
@@ -2185,6 +2185,7 @@ static struct pci_driver de_driver = {
        .id_table       = de_pci_tbl,
        .probe          = de_init_one,
        .remove         = de_remove_one,
+       .shutdown       = de_remove_one,
 #ifdef CONFIG_PM
        .suspend        = de_suspend,
        .resume         = de_resume,
-- 
2.28.0