[PATCH net-next 11/13] net: ipa: explicitly disallow inter-EE interrupts

[Alex Elder]

It is possible for other execution environments (EEs, like the modem)
to request changes to local (AP) channel or event ring state.  We do
not support this feature.

In gsi_irq_setup(), explicitly zero the mask that defines which
channels are permitted to generate inter-EE channel state change
interrupts.  Do the same for the event ring mask.

Signed-off-by: Alex Elder <el...@linaro.org>
---
 drivers/net/ipa/gsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index aae8ea852349d..5e10e5c1713b1 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -259,6 +259,8 @@ static void gsi_irq_setup(struct gsi *gsi)
        iowrite32(0, gsi->virt + GSI_CNTXT_SRC_EV_CH_IRQ_MSK_OFFSET);
        iowrite32(0, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
        iowrite32(0, gsi->virt + GSI_CNTXT_SRC_IEOB_IRQ_MSK_OFFSET);
+       iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_CH_IRQ_OFFSET);
+       iowrite32(0, gsi->virt + GSI_INTER_EE_SRC_EV_CH_IRQ_OFFSET);
 }
 
 /* Turn off all GSI interrupts when we're all done */
@@ -307,8 +309,6 @@ static void gsi_irq_enable(struct gsi *gsi)
        iowrite32(ERROR_INT_FMASK, gsi->virt + GSI_CNTXT_GLOB_IRQ_EN_OFFSET);
        gsi->type_enabled_bitmap |= BIT(GSI_GLOB_EE);
 
-       /* We don't use inter-EE channel or event interrupts */
-
        /* Never enable GSI_BREAK_POINT */
        val = GSI_CNTXT_GSI_IRQ_ALL & ~BREAK_POINT_FMASK;
        iowrite32(val, gsi->virt + GSI_CNTXT_GSI_IRQ_EN_OFFSET);
-- 
2.20.1