blob: 3b65ce57b461efb3ea16b130a336dc8e083e249d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
From 36711e04b081f70286acb2911447550ac9f14d27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Wed, 24 Aug 2022 15:59:49 +0200
Subject: [PATCH 20/96] PCI: aardvark: Dispose bridge irq prior to removing
bridge domain
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Documentation for irq_domain_remove() says that all mapping within the
domain must be disposed prior to domain remove.
Currently bridge irq is not disposed in pci-aardvark.c device unbind callback
which cause that kernel crashes after unloading driver and trying to read
/sys/kernel/debug/irq/irqs/<num> or /proc/interrupts.
Fixes: 815bc3136867 ("PCI: aardvark: Use separate INTA interrupt for emulated root bridge")
Signed-off-by: Pali Rohár <pali@kernel.org>
---
drivers/pci/controller/pci-aardvark.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 4921d9cf80d2..668b052e3e2a 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1577,6 +1577,11 @@ static int advk_pcie_init_rp_irq_domain(struct advk_pcie *pcie)
static void advk_pcie_remove_rp_irq_domain(struct advk_pcie *pcie)
{
+ int virq;
+
+ virq = irq_find_mapping(pcie->rp_irq_domain, 0);
+ if (virq > 0)
+ irq_dispose_mapping(virq);
irq_domain_remove(pcie->rp_irq_domain);
}
--
2.37.2
|
