net: stmmac: Do not accept invalid MTU values

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The maximum MTU value is determined by the maximum size of TX FIFO so
that a full packet can fit in the FIFO. Add a check for this in the MTU
change callback.

Also check if provided and rounded MTU does not passes the maximum limit
of 16K.

Changes from v2:
- Align MTU before checking if its valid

Fixes: 7ac6653a08 ("stmmac: Move the STMicroelectronics driver")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jose Abreu 2019-12-18 11:17:37 +01:00 • committed by David S. Miller

parent 5d626c879e

commit eaf4fac478

1 changed files with 12 additions and 0 deletions

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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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