| Message ID | 1502350920-22750-1-git-send-email-muvarov@gmail.com |
|---|---|
| State | Superseded, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c index 33df340..611e7cc 100644 --- a/drivers/net/ethernet/ti/davinci_mdio.c +++ b/drivers/net/ethernet/ti/davinci_mdio.c @@ -198,8 +198,10 @@ static inline int wait_for_user_access(struct davinci_mdio_data *data) return 0; reg = __raw_readl(®s->control); - if ((reg & CONTROL_IDLE) == 0) + if ((reg & CONTROL_IDLE) == 0) { + usleep_range(100, 200); continue; + } /* * An emac soft_reset may have clobbered the mdio controller's
Polling 14 mdio devices on single mdio bus eats 30% of 1Ghz cpu time due to busy loop in waiti(). Aadd small delay to relax cpu. Signed-off-by: Max Uvarov <muvarov@gmail.com> --- drivers/net/ethernet/ti/davinci_mdio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)