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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>
This commit is contained in:
Koen Vandeputte 2019-09-11 12:47:27 +02:00
parent 00d48bcac0
commit 713561a10b
1 changed files with 27 additions and 0 deletions
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27
target/linux/ar71xx/patches-4.14/955-qca953x-fix-potential-missing-irq-dispatch.patch Normal file
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@ -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();
}
}