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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)
commit9785830852c709d7502a03bcd55eeade28b30c1e
treec68df4bb78daf637325949900e767b0b1fd15a19tree | snapshot
parente8e4ea0da09529e26ca5d30c17197a73538a1cbbcommit | 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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