[PATCH] sfc: EFX_ETHTOOL_STAT calculates the offset of the efx##source_name'sfield in both cases

[Roel Kluin]

EFX_ETHTOOL_STAT calculated the offset of the efx##source_name's field
Regardless of whether that field was NULL.

Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
---
This looks like a bug, but I am not sure whether I understood this correctly,
nor was it tested, was this intended?

diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index 6c0bbed..722bac7 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -41,7 +41,7 @@ struct efx_ethtool_stat {
 	.source = EFX_ETHTOOL_STAT_SOURCE_##source_name,		\
 	.offset = ((((field_type *) 0) ==				\
 		      &((struct efx_##source_name *)0)->field) ?	\
-		    offsetof(struct efx_##source_name, field) :		\
+		    offsetof(struct efx_##stat_name, field) :		\
 		    offsetof(struct efx_##source_name, field)),		\
 	.get_stat = get_stat_function,					\
 }
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