aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx
diff options
context:
space:
mode:
authorKoen Vandeputte <koen.vandeputte@ncentric.com>2019-09-11 12:51:12 +0200
committerKoen Vandeputte <koen.vandeputte@ncentric.com>2019-09-13 16:04:00 +0200
commit90f6af5108c1d81a5c7e78083d82f1035c091bd9 (patch)
tree3243d85e8e3d973e72417f7adf342a1490d6ca2e /target/linux/ar71xx
parente545808e8991ed16ce398709395bba56af6b666d (diff)
downloadupstream-90f6af5108c1d81a5c7e78083d82f1035c091bd9.tar.gz
upstream-90f6af5108c1d81a5c7e78083d82f1035c091bd9.tar.bz2
upstream-90f6af5108c1d81a5c7e78083d82f1035c091bd9.zip
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/ar71xx')
-rw-r--r--target/linux/ar71xx/patches-4.9/955-qca953x-fix-potential-missing-irq-dispatch.patch27
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.9/955-qca953x-fix-potential-missing-irq-dispatch.patch b/target/linux/ar71xx/patches-4.9/955-qca953x-fix-potential-missing-irq-dispatch.patch
new file mode 100644
index 0000000000..5174029989
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.9/955-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();
+ }
+ }
+