fotg210-udc: Mask GRP2 interrupts we don't handle

Currently it leaves unhandled interrupts unmasked, but those are never
acked. In the case of a "device idle" interrupt, this leads to an
effectively frozen system until plugging it in.

Fixes: b84a8dee23fd ("usb: gadget: add Faraday fotg210_udc driver")
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Link: https://lore.kernel.org/r/20210324141115.9384-5-fabian@ritter-vogt.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index a3ad93bfd256b9ee334e0f68465e15a512b82c15..bbcc923763070c7a3069a12591cb4741477d8419 100644 (file)
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -1026,6 +1026,12 @@ static void fotg210_init(struct fotg210_udc *fotg210)
        value &= ~DMCR_GLINT_EN;
        iowrite32(value, fotg210->reg + FOTG210_DMCR);
 
+       /* enable only grp2 irqs we handle */
+       iowrite32(~(DISGR2_DMA_ERROR | DISGR2_RX0BYTE_INT | DISGR2_TX0BYTE_INT
+                   | DISGR2_ISO_SEQ_ABORT_INT | DISGR2_ISO_SEQ_ERR_INT
+                   | DISGR2_RESM_INT | DISGR2_SUSP_INT | DISGR2_USBRST_INT),
+                 fotg210->reg + FOTG210_DMISGR2);
+
        /* disable all fifo interrupt */
        iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1);