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authorKoen Vandeputte <koen.vandeputte@ncentric.com>2019-09-11 12:47:27 +0200
committerKoen Vandeputte <koen.vandeputte@ncentric.com>2019-09-13 16:40:29 +0200
commit713561a10b6e9a7100a860651b700207223c09ef (patch)
treece855848bc9454d02f5e762c729c3d1d2e9cc4ab /target/linux
parent00d48bcac08afc5a586c074894f96d9237fbe823 (diff)
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ar71xx: fix potential IRQ misses during dispatch for qca953x
If both interrupts are set in the current implementation only the 1st will be handled and the 2nd will be skipped due to the "if else" condition. Fix this by using the same approach as done for QCA955x just below it. Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ar71xx/patches-4.14/955-qca953x-fix-potential-missing-irq-dispatch.patch27
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.14/955-qca953x-fix-potential-missing-irq-dispatch.patch b/target/linux/ar71xx/patches-4.14/955-qca953x-fix-potential-missing-irq-dispatch.patch
new file mode 100644
index 0000000000..5174029989
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.14/955-qca953x-fix-potential-missing-irq-dispatch.patch
@@ -0,0 +1,27 @@
+--- a/arch/mips/ath79/irq.c
++++ b/arch/mips/ath79/irq.c
+@@ -69,15 +69,21 @@ static void qca953x_ip2_irq_dispatch(str
+ u32 status;
+
+ status = ath79_reset_rr(QCA953X_RESET_REG_PCIE_WMAC_INT_STATUS);
++ status &= QCA953X_PCIE_WMAC_INT_PCIE_ALL | QCA953X_PCIE_WMAC_INT_WMAC_ALL;
++
++ if (status == 0) {
++ spurious_interrupt();
++ return;
++ }
+
+ if (status & QCA953X_PCIE_WMAC_INT_PCIE_ALL) {
+ ath79_ddr_wb_flush(3);
+ generic_handle_irq(ATH79_IP2_IRQ(0));
+- } else if (status & QCA953X_PCIE_WMAC_INT_WMAC_ALL) {
++ }
++
++ if (status & QCA953X_PCIE_WMAC_INT_WMAC_ALL) {
+ ath79_ddr_wb_flush(4);
+ generic_handle_irq(ATH79_IP2_IRQ(1));
+- } else {
+- spurious_interrupt();
+ }
+ }
+