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FREESCALE FEC DRIVER

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I’m not entirely convinced this is a good idea – maybe it should become optional, or maybe the timed-out ring status should be available via debugfs, but that’s a problem to retrieve if you’re running NFS rootfs and the timeout doesn’t recover properly. Some of these patches are to fix theoretical problems in the driver ones which have been found via a review of the code others address real observable problems such as poor half-duplex performance. One of my motivations for only sending half is to get this half into a state where DaveM is happy to merge it before I sort out the remainder. Article This is v2 of my initial round of patches roughly half of my total patch set for the Freescale FEC driver. Fri, 27 Jun While the original series was well tested during it’s original development, including with performance tests on each patch, that testing and validation has been lost due to the changes during the last merge window, and subsequent rebasing and updating of the patches.

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I’m not entirely convinced this is a good idea – maybe it should become optional, or maybe the timed-out ring status should be available via debugfs, but that’s a problem to retrieve if you’re running NFS rootfs and the timeout doesn’t recover properly.

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One of my motivations for only sending half is to get this half into a state where DaveM is happy to merge it before I sort out the remainder. The remainder of the text is as per my previous message, but with updated diffstat: Freescals of these patches are to fix theoretical problems in the driver ones which have been found via freescale review of the code others address real observable problems such as poor half-duplex performance.

I haven’t changed too much – I’ve fixed the bug which Andy spotted in the transmit handling, but otherwise the patches are much the same.

Article This is v2 of my initial round of patches roughly half of my total patch set for the Freescale FEC driver. Initial round of Freescale FEC ethernet patches.

I’m sending this set out for comments and testing. While the original series was well tested during it’s original freescsle, including with performance tests on each patch, that testing and validation has been lost due to the changes during the last merge window, and subsequent rebasing and updating of the patches.

So far, I have had only one ack for one patch in this series, this is pretty poor, so I’m now sending it with a CFT tag instead. This patch is not strictly part of the RFC, but is included because my complete patch series freescalee to account for that change.

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Towards the end of this series, I have included a patch which was initially freescaale the beginning of the series for dumping out the state of the transmit ring, which is very useful to debug transmit problems.

Fri, 27 Jun This was acceptable when the transmit ring was between 16 and descriptors, but during the recent merge window, this was increased to descriptors, so it will now print around lines to the kernel message log on transmit timeout. There’s quite a lot here, so bear with me on this.

I’ve tried to sort the fixes before the cleanups as best I can, but reordering the series is a full-time job due to it’s size – it’s taken from Monday until now to get this far with it, so I’m hoping that there won’t be any “you should rearrange the patches as X” comments.

The series is based on v3.