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| author | Daniel De Graaf <dgdegra@tycho.nsa.gov> | 2010-09-08 18:10:42 -0400 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-09-09 10:48:22 +1000 |
| commit | 7808121b9a1e44ef12fecd49fa6c268f27a150fc (patch) | |
| tree | 5536cceff908e630d1a15c4f63abd7210ed4973b /Documentation/lockstat.txt | |
| parent | 76ce7618f9a24f7b13958c67f7d5ccfcdab71475 (diff) | |
xenbus: avoid zero returns from read()
It is possible to get a zero return from read() in instances where the
queue is not empty but has no elements with data to deliver to the user.
Since a zero return from read is an error indicator, resume waiting or
return -EAGAIN (for a nonblocking fd) in this case.
Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'Documentation/lockstat.txt')
0 files changed, 0 insertions, 0 deletions