[PATCH] ahci_xgene: Fix the error print invalid resource for APM X-Gene SoC AHCI SATA Host Controller driver.

[Suman Tripathi]

This patch fixes the error print invalid resource for the APM X-Gene
SoC AHCI SATA Host Controller driver. This print was due to the fact
that the controller 3 don't have a mux resource. This didn't result
in any errors but the print seems like meaningless.

Signed-off-by: Loc Ho <***@apm.com>
Signed-off-by: Suman Tripathi <***@apm.com>
---
drivers/ata/ahci_xgene.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 40d0a76..26f1f78 100644
--- 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);
@@ -485,7 +485,13 @@ 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);
--
1.8.2.1

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[Tejun Heo]

Post by Suman Tripathi
This patch fixes the error print invalid resource for the APM X-Gene
SoC AHCI SATA Host Controller driver. This print was due to the fact
that the controller 3 don't have a mux resource. This didn't result
in any errors but the print seems like meaningless.

Applied to libata/for-3.18.

Thanks.