Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / drivers / ata / ahci_xgene.c

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index f03aab187f4da1cf16d3f2cb34642f4fcaad7434..0f8538f238b63f60fb323e075f6f721c5e22c16a 100644 (file)
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -434,7 +434,7 @@ static int xgene_ahci_mux_select(struct xgene_ahci_context *ctx)
        u32 val;
 
        /* Check for optional MUX resource */
-       if (IS_ERR(ctx->csr_mux))
+       if (!ctx->csr_mux)
                return 0;
 
        val = readl(ctx->csr_mux + SATA_ENET_CONFIG_REG);
@@ -484,7 +484,13 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 
        /* Retrieve the optional IP mux resource */
        res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
-       ctx->csr_mux = devm_ioremap_resource(dev, res);
+       if (res) {
+               void __iomem *csr = devm_ioremap_resource(dev, res);
+               if (IS_ERR(csr))
+                       return PTR_ERR(csr);
+
+               ctx->csr_mux = csr;
+       }
 
        dev_dbg(dev, "VAddr 0x%p Mmio VAddr 0x%p\n", ctx->csr_core,
                hpriv->mmio);