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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-27 15:06:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-27 15:06:01 -0700 |
| commit | 28d9aa613daa65b295a099a8433df97de1c56a2f (patch) | |
| tree | 8e7bf451f3390b926787d410c8d5df0454cbf16b /drivers/dma/ioatdma.c | |
| parent | d243769d3f83b318813a04a9592bb7cfedc6c280 (diff) | |
| parent | 10e2ff1c39e6d829379c7c5bb8f1c8f512f257c8 (diff) | |
| download | talos-op-linux-28d9aa613daa65b295a099a8433df97de1c56a2f.tar.gz talos-op-linux-28d9aa613daa65b295a099a8433df97de1c56a2f.zip | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[NET]: Mark Paul Moore as maintainer of labelled networking.
[VLAN/BRIDGE]: Fix "skb_pull_rcsum - Fatal exception in interrupt"
[ISDN]: Get rid of some pointless allocation casts in common and bsd comp.
[NET]: Avoid pointless allocation casts in BSD compression module
[IRDA]: Do not do pointless kmalloc return value cast in KingSun driver
[NET]: Fix crash in dev_mc_sync()/dev_mc_unsync()
[PPPOL2TP]: Fix endianness annotations.
[IOAT]: ioatdma needs to to play nice in a multi-dma-client world
[SLIP]: trivial sparse warning fix
[EQL]: sparse warning fix
[NET]: is_power_of_2 in net/core/neighbour.c
[TCP]: Describe tcp_init_cwnd() thoroughly in a comment.
[NET]: Fix IP_ADD/DROP_MEMBERSHIP to handle only connectionless
[KBUILD]: Sanitize tc_ematch headers.
[IPSEC] AH4: Update IPv4 options handling to conform to RFC 4302.
Diffstat (limited to 'drivers/dma/ioatdma.c')
| -rw-r--r-- | drivers/dma/ioatdma.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c index 2d1f17865b64..41b18c5a3141 100644 --- a/drivers/dma/ioatdma.c +++ b/drivers/dma/ioatdma.c @@ -191,17 +191,12 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan) int i; LIST_HEAD(tmp_list); - /* - * In-use bit automatically set by reading chanctrl - * If 0, we got it, if 1, someone else did - */ - chanctrl = readw(ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); - if (chanctrl & IOAT_CHANCTRL_CHANNEL_IN_USE) - return -EBUSY; + /* have we already been set up? */ + if (!list_empty(&ioat_chan->free_desc)) + return INITIAL_IOAT_DESC_COUNT; /* Setup register to interrupt and write completion status on error */ - chanctrl = IOAT_CHANCTRL_CHANNEL_IN_USE | - IOAT_CHANCTRL_ERR_INT_EN | + chanctrl = IOAT_CHANCTRL_ERR_INT_EN | IOAT_CHANCTRL_ANY_ERR_ABORT_EN | IOAT_CHANCTRL_ERR_COMPLETION_EN; writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); @@ -282,11 +277,6 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan) in_use_descs - 1); ioat_chan->last_completion = ioat_chan->completion_addr = 0; - - /* Tell hw the chan is free */ - chanctrl = readw(ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); - chanctrl &= ~IOAT_CHANCTRL_CHANNEL_IN_USE; - writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); } static struct dma_async_tx_descriptor * |
