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author	Tobias Regnery <tobias.regnery@gmail.com>	2017-01-24 14:34:24 +0100
committer	David S. Miller <davem@davemloft.net>	2017-01-24 15:27:58 -0500
commit	185aceefd80f98dc5b9d73eb6cbb70739a5ce4ea (patch)
tree	9097881a608091eefbbcc1793df9406f5231c399
parent	37187a016c37d7e550544544dba25399ce4589c9 (diff)

alx: work around hardware bug in interrupt fallback path

If requesting msi-x interrupts fails in alx_request_irq we fall back to a single tx queue and msi or legacy interrupts. Currently the adapter stops working in this case and we get tx watchdog timeouts. For reasons unknown the adapter gets confused when we load the dma adresses to the chip in alx_init_ring_ptrs twice: the first time with multiple queues and the second time in the fallback case with a single queue. To fix this move the the call to alx_reinit_rings (which calls alx_init_ring_ptrs) after alx_request_irq. At this time it is clear how much tx queues we have and which dma addresses we use. Fixes: d768319cd427 ("alx: enable multiple tx queues") Signed-off-by: Tobias Regnery <tobias.regnery@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>

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