diff mbox series

[PULL,46/50] igb: Clear-on-read ICR when ICR.INTA is set

Message ID 20230523073238.54236-47-jasowang@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,01/50] e1000e: Fix tx/rx counters | expand

Commit Message

Jason Wang May 23, 2023, 7:32 a.m. UTC 
From: Akihiko Odaki <akihiko.odaki@daynix.com>

For GPIE.NSICR, Section 7.3.2.1.2 says:
> ICR bits are cleared on register read. If GPIE.NSICR = 0b, then the
> clear on read occurs only if no bit is set in the IMS or at least one
> bit is set in the IMS and there is a true interrupt as reflected in
> ICR.INTA.

e1000e does similar though it checks for CTRL_EXT.IAME, which does not
exist on igb.

Suggested-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 hw/net/igb_core.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c
index 823dde8..d00b1ca 100644
--- a/hw/net/igb_core.c
+++ b/hw/net/igb_core.c
@@ -2598,6 +2598,8 @@  igb_mac_icr_read(IGBCore *core, int index)
     } else if (core->mac[IMS] == 0) {
         trace_e1000e_irq_icr_clear_zero_ims();
         igb_lower_interrupts(core, ICR, 0xffffffff);
+    } else if (core->mac[ICR] & E1000_ICR_INT_ASSERTED) {
+        igb_lower_interrupts(core, ICR, 0xffffffff);
     } else if (!msix_enabled(core->owner)) {
         trace_e1000e_irq_icr_clear_nonmsix_icr_read();
         igb_lower_interrupts(core, ICR, 0xffffffff);