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From 589599f1ebbfa109bbcad2758af525b48c01b495 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Wed, 31 Mar 2021 15:14:29 +0200
Subject: [PATCH 87/90] PCI: pciehp: Enable Command Completed Interrupt only if
supported
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The No Command Completed Support bit in the Slot Capabilities register
indicates whether Command Completed Interrupt Enable is unsupported.
Enable this interrupt only in the case it is supported.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
---
drivers/pci/hotplug/pciehp_hpc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 5b0d48435b36..701031d809f5 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -817,7 +817,9 @@ static void pcie_enable_notification(struct controller *ctrl)
else
cmd |= PCI_EXP_SLTCTL_PDCE;
if (!pciehp_poll_mode)
- cmd |= PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE;
+ cmd |= PCI_EXP_SLTCTL_HPIE;
+ if (!pciehp_poll_mode && !NO_CMD_CMPL(ctrl))
+ cmd |= PCI_EXP_SLTCTL_CCIE;
mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
PCI_EXP_SLTCTL_PFDE |
--
2.34.1
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