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rxrpc: Disable IRQ, not BH, to take the lock for ->attend_link

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Use spin_lock_irq(), not spin_lock_bh() to take the lock when accessing the
->attend_link() to stop a delay in the I/O thread due to an interrupt being
taken in the app thread whilst that holds the lock and vice versa.

Fixes: a2ea9a9072 ("rxrpc: Use irq-disabling spinlocks between app and I/O thread")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/2870146.1734037095@warthog.procyon.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Howells 2024-12-12 20:58:15 +00:00 committed by Jakub Kicinski
parent 9495e66885
commit d920270a6d
1 changed files with 4 additions and 4 deletions
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8
net/rxrpc/io_thread.c
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@ -508,9 +508,9 @@ int rxrpc_io_thread(void *data)
while ((conn = list_first_entry_or_null(&conn_attend_q,
struct rxrpc_connection,
attend_link))) {
spin_lock_bh(&local->lock);
spin_lock_irq(&local->lock);
list_del_init(&conn->attend_link);
spin_unlock_bh(&local->lock);
spin_unlock_irq(&local->lock);
rxrpc_input_conn_event(conn, NULL);
rxrpc_put_connection(conn, rxrpc_conn_put_poke);
}
@ -527,9 +527,9 @@ int rxrpc_io_thread(void *data)
while ((call = list_first_entry_or_null(&call_attend_q,
struct rxrpc_call,
attend_link))) {
spin_lock_bh(&local->lock);
spin_lock_irq(&local->lock);
list_del_init(&call->attend_link);
spin_unlock_bh(&local->lock);
spin_unlock_irq(&local->lock);
trace_rxrpc_call_poked(call);
rxrpc_input_call_event(call);
rxrpc_put_call(call, rxrpc_call_put_poke);