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).
regards, h --
hinko<dot>kocevar<at> iskramedical<dot>si Hinko Kocevar, developer "AÃ rÃn" Iskra Medical d.o.o. [Analects XII:22] Stegne 23, 1k LJ, SLO-EU
-- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/