[PATCH] net: dsa: Fix cleanup resources upon module removal

[Neil Armstrong]

The initial commit badly merged into the dsa_resume method instead
of the dsa_remove_dst method.
As consequence, the dst->master_netdev->dsa_ptr is not set to NULL on
removal and re-bind of the dsa device fails with error -17.

Fixes: b0dc635d923c ("net: dsa: cleanup resources upon module removal ")
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
---
 net/dsa/dsa.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

David, Florian, Andrew,

This fix is quite urgent since it breaks all the removal cleanup.

Thanks,
Neil

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index fa4daba..d8fb47f 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -935,6 +935,14 @@ static void dsa_remove_dst(struct dsa_switch_tree *dst)
 {
        int i;
 
+       dst->master_netdev->dsa_ptr = NULL;
+
+       /* If we used a tagging format that doesn't have an ethertype
+        * field, make sure that all packets from this point get sent
+        * without the tag and go through the regular receive path.
+        */
+       wmb();
+
        for (i = 0; i < dst->pd->nr_chips; i++) {
                struct dsa_switch *ds = dst->ds[i];
 
@@ -988,14 +996,6 @@ static int dsa_suspend(struct device *d)
        struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
        int i, ret = 0;
 
-       dst->master_netdev->dsa_ptr = NULL;
-
-       /* If we used a tagging format that doesn't have an ethertype
-        * field, make sure that all packets from this point get sent
-        * without the tag and go through the regular receive path.
-        */
-       wmb();
-
        for (i = 0; i < dst->pd->nr_chips; i++) {
                struct dsa_switch *ds = dst->ds[i];
 
-- 
1.9.1