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ice: use GENMASK instead of BIT(n) - 1 in pack functions
The functions used to pack the Tx and Rx context into the hardware format rely on using BIT() and then subtracting 1 to get a bitmask. These functions even have a comment about how x86 machines can't use this method for certain widths because the SHL instructions will not work properly. The Linux kernel already provides the GENMASK macro for generating a suitable bitmask. Further, GENMASK is capable of generating the mask including the shift_width. Since width is the total field width, take care to subtract one to get the final bit position. Since we now include the shifted bits as part of the mask, shift the source value first before applying the mask. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel) Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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