A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

s390/qdio: lock device while installing IRQ handler

Browse source 
During setup, qdio takes control of the presented ccw device and replaces
the device's IRQ handler with its own. To avoid any interference with
conccurent activity on the device, this should be done while holding the
device's lock.

Signed-off-by: Julian Wiedmann <[email protected]>
Reviewed-by: Benjamin Block <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Julian Wiedmann 2018-03-21 17:17:14 +01:00 • committed by Martin Schwidefsky
commit 7eee12b44e
1 changed files with 2 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/s390/cio/qdio_setup.c
View file

@ -507,8 +507,10 @@ int qdio_setup_irq(struct qdio_initialize *init_data)
irq_ptr->aqueue = *ciw;
/* set new interrupt handler */
spin_lock_irq(get_ccwdev_lock(irq_ptr->cdev));
irq_ptr->orig_handler = init_data->cdev->handler;
init_data->cdev->handler = qdio_int_handler;
spin_unlock_irq(get_ccwdev_lock(irq_ptr->cdev));
return 0;
out_err:
qdio_release_memory(irq_ptr);