linux-kernel - [PATCH 5.2 118/215] PCI: mobiveil: Use the 1st inbound window for MEM inbound transactions

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Message-Id: <20190729190759.569430192@linuxfoundation.org>
Date:   Mon, 29 Jul 2019 21:21:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hou Zhiqiang <Zhiqiang.Hou@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Minghuan Lian <Minghuan.Lian@....com>,
        Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 118/215] PCI: mobiveil: Use the 1st inbound window for MEM inbound transactions

[ Upstream commit f7fee1b42fe4f8171a4b1cad05c61907c33c53f6 ]

The inbound and outbound windows have completely separate control
registers sets in the host controller MMIO space. Windows control
register are accessed through an MMIO base address and an offset
that depends on the window index.

Since inbound and outbound windows control registers are completely
separate there is no real need to use different window indexes in the
inbound/outbound windows initialization routines to prevent clashing.

To fix this inconsistency, change the MEM inbound window index to 0,
mirroring the outbound window set-up.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
[lorenzo.pieralisi@....com: update commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@....com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/controller/pcie-mobiveil.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index e4a1964e1b43..387a20f3c240 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -546,7 +546,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
 			resource_size(pcie->ob_io_res));
 
 	/* memory inbound translation window */
-	program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
+	program_ib_windows(pcie, WIN_NUM_0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry_safe(win, tmp, &pcie->resources) {
-- 
2.20.1