search for: fbioput_con2fbmap

On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > while nouveau was runtime suspended, a deadlock would occur due to > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > Fix this by delaying the drm_fb_helper_set_suspend call. Based on the > i915 code (which was d...

On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > while nouveau was runtime suspended, a deadlock would occur due to > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > Fix this by delaying the drm_fb_helper_set_suspend call. Based on the > i915 code (which was d...

On Wed, Jul 13, 2016 at 02:40:50PM +0200, Peter Wu wrote: > On Wed, Jul 13, 2016 at 11:54:49AM +0200, Daniel Vetter wrote: > > On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > > > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > > > while nouveau was runtime suspended, a deadlock would occur due to > > > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > > > > > Fix this by delaying the drm_fb_helper_set_suspend call....

On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > while nouveau was runtime suspended, a deadlock would occur due to > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > Fix this by delaying the drm_fb_helper_set_suspend call. Based on the > i915 code (which was d...

On Wed, Jul 13, 2016 at 06:17:47PM +0100, Chris Wilson wrote: > On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > > while nouveau was runtime suspended, a deadlock would occur due to > > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > > > Fix this by delaying the drm_fb_helper_set_suspend call. Based on the > &g...

On Wed, Jul 13, 2016 at 11:54:49AM +0200, Daniel Vetter wrote: > On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > > while nouveau was runtime suspended, a deadlock would occur due to > > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > > > Fix this by delaying the drm_fb_helper_set_suspend call. Based on the > &g...

The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called while nouveau was runtime suspended, a deadlock would occur due to nouveau_fbcon_set_suspend also trying to obtain console_lock(). Fix this by delaying the drm_fb_helper_set_suspend call. Based on the i915 code (which was done for performance reaso...

On Wed, Jul 13, 2016 at 04:57:19PM +0200, Daniel Vetter wrote: > On Wed, Jul 13, 2016 at 02:40:50PM +0200, Peter Wu wrote: > > On Wed, Jul 13, 2016 at 11:54:49AM +0200, Daniel Vetter wrote: > > > On Tue, Jul 12, 2016 at 06:49:34PM +0200, Peter Wu wrote: > > > > The FBIOPUT_CON2FBMAP ioctl takes a console_lock(). When this is called > > > > while nouveau was runtime suspended, a deadlock would occur due to > > > > nouveau_fbcon_set_suspend also trying to obtain console_lock(). > > > > > > > > Fix this by delaying the drm_fb_helpe...

...0. Avoid continuously triggering the error: dmesg -D 1. modprobe nouveau runpm=0 (or be sure to wake the device before using con2fbmap, there is a nasty (unrelated) deadlock in there due to recursive console_lockup.) 2. con2fbmap 1 2 (bind console 2 to nouveaufb (1)). This invokes ioctl(/dev/fb0, FBIOPUT_CON2FBMAP, (u32[2]){2, 1})). 3. If you are not there already, switch to tty2 on the nouveau display. 4. Press Enter until you are at the last line of the console (or past it, I forgot). 5. Go to a different tty (e.g. the Intel one) and notice the KASAN report in dmesg. Attached is yet another log (looks...