#1 "brctl show" error when no ports are on bridge

[Roy Marples]

When bridge utils is compiled with sysfs support, an
error is shown when "btcrl show" is run when there are
no ports assigned to a bridge.

The attached patch fixes this behaviour by changing err
from -ENOSYS to errno so that the last error (if any)
is reported instead of assuming that no links means
there is an error.

I don't know if we should only set err if error !=0 though

[Roy Marples]

Patch to fix error when no ports on bridge

[Nobody/Anonymous]

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jj