From: "Michael Büsch" <m@bues.ch>
To: b43-dev@lists.infradead.org
Subject: [PATCH] b43: use rx desc underrun interrupt
Date: Sun, 21 Apr 2013 16:51:42 +0200 [thread overview]
Message-ID: <20130421165142.195c30eb@milhouse> (raw)
In-Reply-To: <CAFzhf4p=x9PTzxjTGVn0P_UDCz=1Za+1AV761Hbou=5mWy5Ycg@mail.gmail.com>
On Sun, 21 Apr 2013 15:27:49 +0100
Piotras <piotras@gmail.com> wrote:
> Based on BCM440X Programmer's Reference Guide that may or may not
> apply to DMA processor used in WLAN chipsets, B43_DMA32_RXSTATUS may
> be updated by hardware to point to the same descriptor as
> B43_DMA32_RXINDEX.
>
> For DMA processor this means that no more free descriptors are
> available. However b43_dma_rx assumes no data needs to be processed
> (see how ring->current_slot is updated and used in loop condition on
> next interrupt). This could explain stalls.
Yes this is why it stalls. But how to fix this without additional counting?
I'd rather prefer wiping the whole ring in that case.
--
Michael
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prev parent reply other threads:[~2013-04-21 14:51 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-15 8:02 [PATCH] b43: use rx desc underrun interrupt Thommy Jakobsson
2013-04-19 14:32 ` Jonas Gorski
2013-04-19 15:55 ` Michael Büsch
2013-04-19 15:59 ` Jonas Gorski
2013-04-19 18:17 ` Larry Finger
2013-04-19 18:57 ` Michael Büsch
2013-04-19 20:37 ` Thommy Jakobsson
2013-04-19 20:46 ` Michael Büsch
2013-04-19 21:05 ` Larry Finger
2013-04-19 20:30 ` Thommy Jakobsson
2013-04-20 14:14 ` Thommy
2013-04-20 18:35 ` Larry Finger
2013-04-20 22:47 ` Thommy Jakobsson
2013-04-20 19:12 ` Michael Büsch
2013-04-20 19:47 ` Thommy Jakobsson
2013-04-20 19:50 ` Michael Büsch
2013-04-20 20:16 ` Thommy Jakobsson
2013-04-20 20:38 ` Michael Büsch
2013-04-20 20:56 ` Piotras
[not found] ` <CAFzhf4rSUO9mn_RKw4Vehw2LKggFdC_W0v-K_KKCZJez1AwynQ@mail.gmail.com>
2013-04-20 21:01 ` Thommy Jakobsson
2013-04-20 21:10 ` Thommy Jakobsson
2013-04-20 21:23 ` Thommy Jakobsson
2013-04-21 6:38 ` Michael Büsch
2013-04-21 8:22 ` Thommy Jakobsson
2013-04-21 8:44 ` Michael Büsch
2013-04-21 9:01 ` Thommy Jakobsson
2013-04-21 9:21 ` Michael Büsch
2013-04-21 12:12 ` Thommy Jakobsson
2013-04-21 14:46 ` Piotras
2013-04-21 14:59 ` Michael Büsch
2013-04-21 15:24 ` Piotras
2013-04-21 16:35 ` Michael Büsch
2013-04-21 15:11 ` Thommy Jakobsson
2013-04-21 16:31 ` Michael Büsch
2013-04-21 18:07 ` Thommy Jakobsson
2013-04-21 18:26 ` Michael Büsch
2013-04-21 18:44 ` Thommy Jakobsson
[not found] ` <CAOTQ16LCWpAOndQsHBxN1-X_8SLpcU8V=mM41gvcNRocA=GhsA@mail.gmail.com>
2013-04-21 18:44 ` Michael Büsch
2013-04-21 20:13 ` Thommy Jakobsson
2013-04-21 21:53 ` Michael Büsch
2013-04-22 8:11 ` Thommy Jakobsson
2013-04-22 10:00 ` Michael Büsch
2013-04-23 6:22 ` Michael Büsch
2013-04-21 14:27 ` Piotras
2013-04-21 14:51 ` Michael Büsch [this message]
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