diff mbox series

[net-next,v2,1/5] net: netpoll: extract core of netpoll_cleanup

Message ID 20240808122518.498166-2-leitao@debian.org (mailing list archive)
State Accepted
Commit 1ef33652d22c69a2a7519d003cd6c79b8e514f44
Delegated to: Netdev Maintainers
Headers show
Series net: netconsole: Fix netconsole unsafe locking | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success Errors and warnings before: 9 this patch: 9
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 50 this patch: 50
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 30 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-10--18-00 (tests: 707)

Commit Message

Breno Leitao Aug. 8, 2024, 12:25 p.m. UTC 
Extract the core part of netpoll_cleanup(), so, it could be called from
a caller that has the rtnl lock already.

Netconsole uses this in a weird way right now:

	__netpoll_cleanup(&nt->np);
	spin_lock_irqsave(&target_list_lock, flags);
	netdev_put(nt->np.dev, &nt->np.dev_tracker);
	nt->np.dev = NULL;
	nt->enabled = false;

This will be replaced by do_netpoll_cleanup() as the locking situation
is overhauled.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
---
 include/linux/netpoll.h |  1 +
 net/core/netpoll.c      | 12 +++++++++---
 2 files changed, 10 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index bd19c4b91e31..cd4e28db0cbd 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -64,6 +64,7 @@  int netpoll_setup(struct netpoll *np);
 void __netpoll_cleanup(struct netpoll *np);
 void __netpoll_free(struct netpoll *np);
 void netpoll_cleanup(struct netpoll *np);
+void do_netpoll_cleanup(struct netpoll *np);
 netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
 
 #ifdef CONFIG_NETPOLL
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 55bcacf67df3..a58ea724790c 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -853,14 +853,20 @@  void __netpoll_free(struct netpoll *np)
 }
 EXPORT_SYMBOL_GPL(__netpoll_free);
 
+void do_netpoll_cleanup(struct netpoll *np)
+{
+	__netpoll_cleanup(np);
+	netdev_put(np->dev, &np->dev_tracker);
+	np->dev = NULL;
+}
+EXPORT_SYMBOL(do_netpoll_cleanup);
+
 void netpoll_cleanup(struct netpoll *np)
 {
 	rtnl_lock();
 	if (!np->dev)
 		goto out;
-	__netpoll_cleanup(np);
-	netdev_put(np->dev, &np->dev_tracker);
-	np->dev = NULL;
+	do_netpoll_cleanup(np);
 out:
 	rtnl_unlock();
 }