net: aquantia: Change inefficient wait loop on fw data reads

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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>

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Igor Russkikh 2018-03-20 14:40:33 +03:00 • committed by David S. Miller

parent d0f0fb25d6

commit 47203b3426

2 changed files with 28 additions and 15 deletions

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42

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c

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1

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h

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