[PATCH] tpm_crb: fix ptr_ret.cocci warnings

[kbuild test robot]

drivers/char/tpm/tpm_crb.c:297:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
---

 tpm_crb.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -294,9 +294,7 @@ static int crb_map_io(struct acpi_device
 	memcpy_fromio(&pa, &priv->cca->rsp_pa, 8);
 	pa = le64_to_cpu(pa);
 	priv->rsp = crb_access(dev, priv, pa, ioread32(&priv->cca->rsp_size));
-	if (IS_ERR(priv->rsp))
-		return PTR_ERR(priv->rsp);
-	return 0;
+	return PTR_ERR_OR_ZERO(priv->rsp);
 }
 
 static int crb_acpi_add(struct acpi_device *device)