i40e: validate ring_len parameter against hardware-specific values

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[ Upstream commit 6994283421 ]

The maximum number of descriptors supported by the hardware is
hardware-dependent and can be retrieved using
i40e_get_max_num_descriptors(). Move this function to a shared header
and use it when checking for valid ring_len parameter rather than using
hardcoded value.

By fixing an over-acceptance issue, behavior change could be seen where
ring_len could now be rejected while configuring rx and tx queues if its
size is larger than the hardware-dependent maximum number of
descriptors.

Fixes: 55d225670d ("i40e: add validation for ring_len param")
Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Gregory Herrero 2025-12-12 22:06:43 +01:00 • committed by Greg Kroah-Hartman

parent 0daf39ee1e

commit cfddf4af22

3 changed files with 13 additions and 14 deletions

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11

drivers/net/ethernet/intel/i40e/i40e.h

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12

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

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4

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

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