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authorAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>2019-09-03 14:34:51 +0200
committerMichael Ellerman <mpe@ellerman.id.au>2019-09-25 00:32:59 +0200
commit4111cdef0e871c0f7c8874b19ee68a3671f7d63e (patch)
tree741bbfa3367f255495dce3ccf1d656bc9d9e64db /arch/powerpc
parentselftests/powerpc: Add test case for tlbie vs mtpidr ordering issue (diff)
downloadlinux-4111cdef0e871c0f7c8874b19ee68a3671f7d63e.tar.xz
linux-4111cdef0e871c0f7c8874b19ee68a3671f7d63e.zip
powerpc/nvdimm: Use HCALL error as the return value
This simplifies the error handling and also enable us to switch to H_SCM_QUERY hcall in a later patch on H_OVERLAP error. We also do some kernel print formatting fixup in this patch. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190903123452.28620-1-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/pseries/papr_scm.c26
1 files changed, 11 insertions, 15 deletions
diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index a5ac371a3f06..3bef4d298ac6 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -66,28 +66,22 @@ static int drc_pmem_bind(struct papr_scm_priv *p)
} while (rc == H_BUSY);
if (rc) {
- /* H_OVERLAP needs a separate error path */
- if (rc == H_OVERLAP)
- return -EBUSY;
-
dev_err(&p->pdev->dev, "bind err: %lld\n", rc);
- return -ENXIO;
+ return rc;
}
p->bound_addr = saved;
-
- dev_dbg(&p->pdev->dev, "bound drc %x to %pR\n", p->drc_index, &p->res);
-
- return 0;
+ dev_dbg(&p->pdev->dev, "bound drc 0x%x to %pR\n", p->drc_index, &p->res);
+ return rc;
}
-static int drc_pmem_unbind(struct papr_scm_priv *p)
+static void drc_pmem_unbind(struct papr_scm_priv *p)
{
unsigned long ret[PLPAR_HCALL_BUFSIZE];
uint64_t token = 0;
int64_t rc;
- dev_dbg(&p->pdev->dev, "unbind drc %x\n", p->drc_index);
+ dev_dbg(&p->pdev->dev, "unbind drc 0x%x\n", p->drc_index);
/* NB: unbind has the same retry requirements as drc_pmem_bind() */
do {
@@ -110,10 +104,10 @@ static int drc_pmem_unbind(struct papr_scm_priv *p)
if (rc)
dev_err(&p->pdev->dev, "unbind error: %lld\n", rc);
else
- dev_dbg(&p->pdev->dev, "unbind drc %x complete\n",
+ dev_dbg(&p->pdev->dev, "unbind drc 0x%x complete\n",
p->drc_index);
- return rc == H_SUCCESS ? 0 : -ENXIO;
+ return;
}
static int papr_scm_meta_get(struct papr_scm_priv *p,
@@ -436,14 +430,16 @@ static int papr_scm_probe(struct platform_device *pdev)
rc = drc_pmem_bind(p);
/* If phyp says drc memory still bound then force unbound and retry */
- if (rc == -EBUSY) {
+ if (rc == H_OVERLAP) {
dev_warn(&pdev->dev, "Retrying bind after unbinding\n");
drc_pmem_unbind(p);
rc = drc_pmem_bind(p);
}
- if (rc)
+ if (rc != H_SUCCESS) {
+ rc = -ENXIO;
goto err;
+ }
/* setup the resource for the newly bound range */
p->res.start = p->bound_addr;