Hello Sagi,
Hmm ... why would it be unacceptable to return 0 if sg_nents == 0 ?
Regarding which component to modify if mapping the first page fails:
for almost every kernel function I know a negative return value means
failure and a return value >= 0 means success. Hence my proposal to
change the return value of the ib_map_mr_sg() function if mapping the
first page fails.
I'm fine with that.
How about the patch below ?
Looks fine.
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