> -----Original Message----- > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > owner@xxxxxxxxxxxxxxx] On Behalf Of Frederik Kriewitz > Sent: Tuesday, August 18, 2009 8:32 AM > To: linux-omap@xxxxxxxxxxxxxxx > Subject: OMAPFB: LL pointer dereference because of uninitialized mutex > > Hello, Hi, > > I'm trying to add support for a omap3 board. > > But I get a NULL pointer dereference during initialization of the lcd > panel driver because framebufferInfo->mm_lock wasn't initialized. > > Code of the lcd driver: http://pastebin.com/m44ccc56d (nothing special) > > Stack trace: > __mutex_lock_slowpath() > mutex_lock() > set_fb_fix() > omapfb_do_probe() > devkit8000_panel_probe() << my probe function > platform_drv_probe() > ... > > It get's initialized in register_framebuffer() but in my case the > probe function gets called before register_framebuffer(). > > Once I added the missing inits to framebuffer_alloc() > (drivers/video/fbsysfs.c) it works fine: > mutex_init(&info->lock); > mutex_init(&info->mm_lock); > > How I'm intended to fix this? Can you try attached patch, and let me know if worked for you? Regards, Sergio > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
Attachment:
0001-omapfb-Reorder-Register_framebuffer-call.patch
Description: 0001-omapfb-Reorder-Register_framebuffer-call.patch
