octeontx2-af: Always configure NIX TX link credits based on max frame size

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[ Upstream commit a0d9528f6d ]

Currently the NIX TX link credits are initialized based on the max frame
size that can be transmitted on a link but when the MTU is changed, the
NIX TX link credits are reprogrammed by the SW based on the new MTU value.
Since SMQ max packet length is programmed to max frame size by default,
there is a chance that NIX TX may stall while sending a max frame sized
packet on the link with insufficient credits to send the packet all at
once. This patch avoids stall issue by not changing the link credits
dynamically when the MTU is changed.

Fixes: 1c74b89171 ("octeontx2-af: Wait for TX link idle for credits change")
Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Naveen Mamindlapalli 2024-01-02 15:26:43 +05:30 • committed by Greg Kroah-Hartman

parent 84c3833a93

commit b67e7d78e4

1 changed files with 3 additions and 107 deletions

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drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c

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