sfc: Maintain interrupt moderation values in ticks, not microseconds

This simplifies the implementation a lot.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 10 deletions

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 1582df7aba7b..e3c33fa06c86 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1063,20 +1063,11 @@ void falcon_set_int_moderation(struct efx_channel *channel)
 
         /* Set timer register */
         if (channel->irq_moderation) {
-                /* Round to resolution supported by hardware.  The value we
-                 * program is based at 0.  So actual interrupt moderation
-                 * achieved is ((x + 1) * res).
-                 */
-                channel->irq_moderation -= (channel->irq_moderation %
-                                            FALCON_IRQ_MOD_RESOLUTION);
-                if (channel->irq_moderation < FALCON_IRQ_MOD_RESOLUTION)
-                        channel->irq_moderation = FALCON_IRQ_MOD_RESOLUTION;
                 EFX_POPULATE_DWORD_2(timer_cmd,
                                      FRF_AB_TC_TIMER_MODE,
                                      FFE_BB_TIMER_MODE_INT_HLDOFF,
                                      FRF_AB_TC_TIMER_VAL,
-                                     channel->irq_moderation /
-                                     FALCON_IRQ_MOD_RESOLUTION - 1);
+                                     channel->irq_moderation - 1);
         } else {
                 EFX_POPULATE_DWORD_2(timer_cmd,
                                      FRF_AB_TC_TIMER_MODE,