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From 37248c705254f050fb67b107eb389a378ab0428e 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 44/53] 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 ef807c79b1b1..a5199b312e74 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 |
--
2.37.3
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