ath79: ignore the abused interrupt-map on PCIe node

ath79 PCIe interrupt controller has stopped working correctly. This
is because the DT exposing a non-sensical interrupt-map property,
and their drivers relying on the kernel ignoring this property[1].

This patch fixes the PCIe init error:
ath9k 0000:00:00.0: of_irq_parse_pci: failed with rc=-14

Notice:
This is just a workaround, not a fix. PCIe driver and related dts
node need to be rewritten.

[1] https://lore.kernel.org/all/20211201114102.13446-1-maz@kernel.org/

Signed-off-by: Shiji Yang <yangshiji66@qq.com>

diff --git a/target/linux/ath79/patches-6.1/810-ath79-ignore-the-abused-interrupt-map-on-pcie-node.patch b/target/linux/ath79/patches-6.1/810-ath79-ignore-the-abused-interrupt-map-on-pcie-node.patch
new file mode 100644 (file)
index 0000000..980c265
--- /dev/null
+++ b/target/linux/ath79/patches-6.1/810-ath79-ignore-the-abused-interrupt-map-on-pcie-node.patch
@@ -0,0 +1,33 @@
+From: Shiji Yang <yangshiji66@outlook.com>
+Date: Wed, 31 May 2023 00:15:23 +0000
+Subject: [PATCH] ath79: ignore the abused interrupt-map on pcie node
+
+ath79 PCIe interrupt controller has stopped working correctly. This
+is because the DT exposing a non-sensical interrupt-map property,
+and their drivers relying on the kernel ignoring this property[1].
+
+This patch fix the pcie init error:
+ath9k 0000:00:00.0: of_irq_parse_pci: failed with rc=-14
+
+Notice:
+This is just a workaround, not a fix. PCIe driver and related dts
+node need to be rewritten.
+
+[1] https://lore.kernel.org/all/20211201114102.13446-1-maz@kernel.org/
+
+Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
+---
+ drivers/of/irq.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/of/irq.c
++++ b/drivers/of/irq.c
+@@ -86,6 +86,8 @@ EXPORT_SYMBOL_GPL(of_irq_find_parent);
+  * drawing board.
+  */
+ static const char * const of_irq_imap_abusers[] = {
++      "qca,ar7100-pci",
++      "qcom,ar7240-pci",
+       "CBEA,platform-spider-pic",
+       "sti,platform-spider-pic",
+       "realtek,rtl-intc",