powerpc/powernv: Fix endian issue in opal_xscom_read
opal_xscom_read uses a pointer to return the data so we need to byteswap it on LE builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -720,7 +720,7 @@ int64_t opal_pci_next_error(uint64_t phb_id, uint64_t *first_frozen_pe,
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int64_t opal_pci_poll(uint64_t phb_id);
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int64_t opal_return_cpu(void);
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int64_t opal_xscom_read(uint32_t gcid, uint32_t pcb_addr, uint64_t *val);
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int64_t opal_xscom_read(uint32_t gcid, uint32_t pcb_addr, __be64 *val);
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int64_t opal_xscom_write(uint32_t gcid, uint32_t pcb_addr, uint64_t val);
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int64_t opal_lpc_write(uint32_t chip_id, enum OpalLPCAddressType addr_type,
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@ -96,9 +96,11 @@ static int opal_scom_read(scom_map_t map, u64 reg, u64 *value)
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{
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struct opal_scom_map *m = map;
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int64_t rc;
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__be64 v;
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reg = opal_scom_unmangle(reg);
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rc = opal_xscom_read(m->chip, m->addr + reg, (uint64_t *)__pa(value));
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rc = opal_xscom_read(m->chip, m->addr + reg, (__be64 *)__pa(&v));
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*value = be64_to_cpu(v);
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return opal_xscom_err_xlate(rc);
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}
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