EDAC: Add helper which returns the loaded platform driver
Only a single EDAC platform driver can be loaded. When ghes_edac is enabled, an EDAC platform driver still attempts to register itself and fails in edac_mc_add_mc(). Add edac_get_owner() so that EDAC platform drivers can check the owner first. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Suggested-by: Borislav Petkov <bp@alien8.de> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20170823225447.15608-5-toshi.kani@hpe.com [ Massage commit message. ] Signed-off-by: Borislav Petkov <bp@suse.de>
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@ -53,7 +53,7 @@ static LIST_HEAD(mc_devices);
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* Used to lock EDAC MC to just one module, avoiding two drivers e. g.
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* apei/ghes and i7core_edac to be used at the same time.
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*/
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static void const *edac_mc_owner;
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static const char *edac_mc_owner;
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static struct bus_type mc_bus[EDAC_MAX_MCS];
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@ -701,6 +701,11 @@ unlock:
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}
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EXPORT_SYMBOL(edac_mc_find);
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const char *edac_get_owner(void)
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{
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return edac_mc_owner;
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}
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EXPORT_SYMBOL_GPL(edac_get_owner);
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/* FIXME - should a warning be printed if no error detection? correction? */
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int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
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@ -128,6 +128,14 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num,
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unsigned sz_pvt);
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/**
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* edac_get_owner - Return the owner's mod_name of EDAC MC
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*
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* Returns:
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* Pointer to mod_name string when EDAC MC is owned. NULL otherwise.
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*/
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extern const char *edac_get_owner(void);
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/*
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* edac_mc_add_mc_with_groups() - Insert the @mci structure into the mci
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* global list and create sysfs entries associated with @mci structure.
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*
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