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net: aquantia: Change inefficient wait loop on fw data reads
authorIgor Russkikh <igor.russkikh@aquantia.com>
Tue, 20 Mar 2018 11:40:33 +0000 (14:40 +0300)
committerDavid S. Miller <davem@davemloft.net>
Thu, 22 Mar 2018 16:02:49 +0000 (12:02 -0400)
commit47203b3426a6d0ac8b7a96259ed6784158b6d74b
treec68df4bb78daf637325949900e767b0b1fd15a19tree | snapshot
parentd0f0fb25d6c7a7c299d9bdaa2a11e96e4102e944commit | diff
net: aquantia: Change inefficient wait loop on fw data reads

B1 hardware changes behavior of mailbox interface, it has busy bit
always raised. Data ready condition should be detected by increment
of address register.

Old code has empty `for` loop, and that caused cpu overloads on B1
hardware. aq_nic_service_timer_cb consumed ~100ms because of that.

Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c diff | blob | history
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h diff | blob | history
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