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authorOliver O'Halloran <oohall@gmail.com>2018-12-07 02:17:11 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2018-12-09 21:32:30 +1100
commit409dd7dc83eb54c4bc156aea890cc95bc21dc6f0 (patch)
tree0c5f90d735d2013f6b71773432fd45a456de76f3 /arch
parent683ec0e04ab7e2d86d2656c71322dfb2ebf063fc (diff)
downloadlinux-409dd7dc83eb54c4bc156aea890cc95bc21dc6f0.tar.bz2
powerpc/papr_scm: Remove endian conversions
The return values of a h-call are returned in the CPU registers and written to the provided buffer by the plpar_hcall() wrapper. As a result the values written to memory are always in the native endian and should not be byte swapped. The inital implementation of the H-Call interface was done in qemu and the returned values were byte swapped unnecessarily in both the hypervisor and in the driver so this was only noticed when bringing up the PowerVM implementation. Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions") Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/pseries/papr_scm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index de47e3719c8d..8b5153c55da6 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -55,7 +55,7 @@ static int drc_pmem_bind(struct papr_scm_priv *p)
do {
rc = plpar_hcall(H_SCM_BIND_MEM, ret, p->drc_index, 0,
p->blocks, BIND_ANY_ADDR, token);
- token = be64_to_cpu(ret[0]);
+ token = ret[0];
cond_resched();
} while (rc == H_BUSY);
@@ -64,7 +64,7 @@ static int drc_pmem_bind(struct papr_scm_priv *p)
return -ENXIO;
}
- p->bound_addr = be64_to_cpu(ret[1]);
+ p->bound_addr = ret[1];
dev_dbg(&p->pdev->dev, "bound drc %x to %pR\n", p->drc_index, &p->res);
@@ -82,7 +82,7 @@ static int drc_pmem_unbind(struct papr_scm_priv *p)
do {
rc = plpar_hcall(H_SCM_UNBIND_MEM, ret, p->drc_index,
p->bound_addr, p->blocks, token);
- token = be64_to_cpu(ret);
+ token = ret[0];
cond_resched();
} while (rc == H_BUSY);