From: Justin Ernst justin.ernst@hpe.com
[ Upstream commit 6b58859419554fb824e09cfdd73151a195473cbc ]
We observe an oops in the skx_edac module during boot:
EDAC MC0: Giving out device to module skx_edac controller Skylake Socket#0 IMC#0 EDAC MC1: Giving out device to module skx_edac controller Skylake Socket#0 IMC#1 EDAC MC2: Giving out device to module skx_edac controller Skylake Socket#1 IMC#0 ... EDAC MC13: Giving out device to module skx_edac controller Skylake Socket#0 IMC#1 EDAC MC14: Giving out device to module skx_edac controller Skylake Socket#1 IMC#0 EDAC MC15: Giving out device to module skx_edac controller Skylake Socket#1 IMC#1 Too many memory controllers: 16 EDAC MC: Removed device 0 for skx_edac Skylake Socket#0 IMC#0
We observe there are two memory controllers per socket, with a limit of 16. Raise the maximum number of memory controllers from 16 to 2 * MAX_NUMNODES (1024).
[ bp: This is just a band-aid fix until we've sorted out the whole issue with the bus_type association and handling in EDAC and can get rid of this arbitrary limit. ]
Signed-off-by: Justin Ernst justin.ernst@hpe.com Signed-off-by: Borislav Petkov bp@suse.de Acked-by: Russ Anderson russ.anderson@hpe.com Cc: Mauro Carvalho Chehab mchehab@kernel.org Cc: linux-edac@vger.kernel.org Link: https://lkml.kernel.org/r/20180925143449.284634-1-justin.ernst@hpe.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/edac.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/edac.h b/include/linux/edac.h index 4fe67b853de04..9bb4f3311e137 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -17,6 +17,7 @@ #include <linux/completion.h> #include <linux/workqueue.h> #include <linux/debugfs.h> +#include <linux/numa.h>
struct device;
@@ -778,6 +779,6 @@ struct mem_ctl_info { /* * Maximum number of memory controllers in the coherent fabric. */ -#define EDAC_MAX_MCS 16 +#define EDAC_MAX_MCS 2 * MAX_NUMNODES
#endif