sfc: Validate IRQ moderation parameters in efx_init_irq_moderation()
Add a range check, and move the check that RX and TX are consistent
from efx_ethtool_set_coalesce().
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
index 5735e84..4fdd148 100644
--- a/drivers/net/ethernet/sfc/siena.c
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -36,6 +36,8 @@
{
efx_dword_t timer_cmd;
+ BUILD_BUG_ON(EFX_IRQ_MOD_MAX > (1 << FRF_CZ_TC_TIMER_VAL_WIDTH));
+
if (channel->irq_moderation)
EFX_POPULATE_DWORD_2(timer_cmd,
FRF_CZ_TC_TIMER_MODE,