From: Fabian Vogt <fabian@xxxxxxxxxxxxxx>
[ Upstream commit 9aee3a23d6455200702f3a57e731fa11e8408667 ]
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@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210324141115.9384-5-fabian@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/usb/gadget/udc/fotg210-udc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index d0a9ce7d0635..491b04dd6db7 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -1033,6 +1033,12 @@ 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);
--
2.30.2
