From 46f748ccaf011af0beccbfc7ae27f3f6c9a56472 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Thu, 5 Nov 2020 12:14:05 -0600 Subject: [PATCH] net: ipa: explicitly disallow inter-EE interrupts 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 Signed-off-by: Jakub Kicinski --- 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 aae8ea852349..5e10e5c1713b 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); -- 2.11.0