On 07/08/2016 04:35 PM, Eric Blake wrote: > Drivers should be able to rely on the block layer honoring the > max transfer length, rather than needing to return -EINVAL > (iscsi) or manually fragment things (nbd). This patch adds > the fragmentation in the block layer, after requests have been > aligned (fragmenting before alignment would lead to multiple > unaligned requests, rather than just the head and tail). > > The return value was previously nebulous on success (sometimes > zero, sometimes the length read); since we never have a short > read, and since fragmenting may store yet another positive > value in 'ret', change the function to always return the > incoming 'bytes' value on success. > > Signed-off-by: Eric Blake <ebl...@redhat.com> > > --- > v2: Fix uninitialized use of 'ret' for an all-zero read beyond eof
Uggh. Something I did here and not in v1 is now causing 'make check-qtest' failures. Please don't merge until I've posted v3. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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