The global variable dgnc_poll_tick is read in the function dgnc_poll_handler and modified in dgnc_driver_pollrate_store. The read access is protected by spin_lock_irqsave whereas the write is not. The protection of write access is needed, since it is possible to have multiple programs that try to modify, simultaneously, dngc_poll_tick. The following patch corrects this bug.
Salah Triki (1): staging: dgnc: take lock when storing value in dgnc_poll_tick drivers/staging/dgnc/dgnc_driver.c | 2 +- drivers/staging/dgnc/dgnc_driver.h | 1 + drivers/staging/dgnc/dgnc_sysfs.c | 9 ++++++++- 3 files changed, 10 insertions(+), 2 deletions(-) -- 1.9.1 _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
