linux-kernel - [PATCH pci] PCI: dwc: fix inverted condition of DMA mask setup warning

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Date:   Tue, 22 Dec 2020 15:07:43 +0000
From:   Alexander Lobakin <alobakin@...me>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Rob Herring <robh@...nel.org>, Vidya Sagar <vidyas@...dia.com>,
        Robin Murphy <robin.murphy@....com>,
        Alexander Lobakin <alobakin@...me>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH pci] PCI: dwc: fix inverted condition of DMA mask setup warning

Commit 660c486590aa ("PCI: dwc: Set 32-bit DMA mask for MSI target
address allocation") added dma_mask_set() call to explicitly set
32-bit DMA mask for MSI message mapping, but for now it throws a
warning on ret == 0, while dma_set_mask() returns 0 in case of
success.
Fix this by inverting the condition.

Misc: remove redundant braces around single statement.

Fixes: 660c486590aa ("PCI: dwc: Set 32-bit DMA mask for MSI target address allocation")
Signed-off-by: Alexander Lobakin <alobakin@...me>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 516b151e0ef3..fa40cc2e376f 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -397,12 +397,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
 							    pp);
 
 			ret = dma_set_mask(pci->dev, DMA_BIT_MASK(32));
-			if (!ret) {
+			if (ret)
 				dev_warn(pci->dev,
 					 "Failed to set DMA mask to 32-bit. "
 					 "Devices with only 32-bit MSI support"
 					 " may not work properly\n");
-			}
 
 			pp->msi_data = dma_map_single_attrs(pci->dev, &pp->msi_msg,
 						      sizeof(pp->msi_msg),
-- 
2.29.2