linux-kernel - [PATCH v2] PCI: dwc: designware: test PCIE_ATU

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Date:   Tue, 18 Jul 2017 14:48:21 +0800
From:   Jisheng Zhang <jszhang@...vell.com>
To:     <jingoohan1@...il.com>, <Joao.Pinto@...opsys.com>,
        <bhelgaas@...gle.com>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Jisheng Zhang <jszhang@...vell.com>
Subject: [PATCH v2] PCI: dwc: designware: test PCIE_ATU_ENABLE bit to check enabled or not

The ATU CTRL2 register is 32 bit, besides the enable bit, other bits
may also be set. To check whether the ATU is enabled or not, we should
test the enable bit.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
Acked-by: Joao Pinto <jpinto@...opsys.com>
---
Since v1:
 - Add Joao's Ack
 - Fix typo in commit msg, thank Jingoo

 drivers/pci/dwc/pcie-designware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 0e03af279259..6bf0b409050a 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -177,7 +177,7 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
 	 */
 	for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
 		val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2);
-		if (val == PCIE_ATU_ENABLE)
+		if (val & PCIE_ATU_ENABLE)
 			return;
 
 		usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
-- 
2.13.2