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Currently, the hardware TID index is assumed to start from index 0.
However, with the following changeset,

commit c2193999 ("cxgb4: add support for high priority filters")

hardware TID index can start after the high priority region, which
has introduced a regression resulting in connection failures for
ULDs.

So, fix all related code to properly recalculate the TID start index
based on whether high priority filters are enabled or not.

Fixes: c2193999

 ("cxgb4: add support for high priority filters")
Signed-off-by: Shahjada Abul Husain <shahjada@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>