kernel: disable IRQs on driver removal

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

kernel: disable IRQs on driver removal
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
ab490ef9 · Federico Vaga · f9fc972d · ab490ef9
Commit ab490ef9 authored Jun 21, 2016 by Federico Vaga
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fa-irq.c kernel/fa-irq.c +7 -0

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--- a/kernel/fa-irq.c
+++ b/kernel/fa-irq.c
@@ -430,6 +430,13 @@ int fa_free_irqs(struct fa_dev *fa)
 {
 	struct fmc_device *fmc = fa->fmc;

+	/*
+	 * When we unload the driver the FPGA is still running so it may
+	 * rises interrupts. Disable IRQs in order to prevent spurious
+	 * interrupt when the driver is not there to handle them.
+	 */
+	fa_disable_irqs(fa);
+
 	/* Release carrier IRQs (if any) */
 	if (fa->carrier_op->free_irqs)
 		fa->carrier_op->free_irqs(fa);