On Tue, 2004-07-20 at 21:56, Hinko Kocevar wrote: Hi,
Looking at scull_read() in LDD2 how is semaphore released if the read operation succeeds ? I mean, up is invoked only if error occours so lines after out: label are called. As I understand this example, out: label could be reached if doing multiple scull_read() in a loop, and it would fail if either EOF is reached or no data is available in private_data.
It puzzles me because it is stated on a page before that claimed semaphore must be released as well (that makes sense).
But he IS releasing the semaphore, in the stmt after the label, remember that the stmt after
out: will also be read even in the case of normal execution of code in that fxn.
regards, h
HTH, - mandeep
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