Re: [PATCH] thunderbolt: debugfs: Show all accessible dwords

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On Tue, Mar 09, 2021 at 12:47:11PM +0200, Yehezkel Bernat wrote:
> On Tue, Mar 9, 2021 at 11:22 AM Gil Fine <gil.fine@xxxxxxxxx> wrote:
> >
> > Currently, when first failure occurs while reading of the block,
> > we stop reading the block and jump to the next capability.
> > This doesn't cover the case of block with "holes" of inaccessible
> > dwords, followed by accessible dwords.
> > This patch address this problem.
> > In case of failure while reading the complete block in one transaction,
> > (because of one or more dwords is inaccessible), we read the remaining
> > dwords of the block dword-by-dword, one dword per transaction,
> > till the end of the block.
> 
> Just wondering: is there any chance this will slow down the device adding flow
> if there are many inaccessible dwords, or we expect the read to return
> immediately for such dwords?  If for some devices it may be a slow process, does
> it make sense to have a way to disable this feature for specific devices or by a
> module parameter?  Maybe we don't worry about it as it's only for debugfs?

We don't worry about it as it is just debugfs ;-)



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