On Mon, Apr 4, 2016 at 9:55 AM, Jiri Slaby <jslaby@xxxxxxx> wrote: > On 04/02/2016, 12:35 PM, Dmitry Vyukov wrote: >> Hello, >> >> After updating from 8e0f93cda48ed054e1216bab5c60017e1a5fc1e8 to >> 05cf8077e54b20dddb756eaa26f3aeb5c38dd3cf (Apr 1) I've started seeing >> the following warnings: >> >> genirq: Flags mismatch irq 4. 00000000 (serial) vs. 00000080 (goldfish_pdev_bus) >> CPU: 3 PID: 6626 Comm: init Tainted: G W 4.6.0-rc1+ #338 >> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 >> ffffffff87eb26a0 ffff88003da17618 ffffffff82c8ea9f ffffffff86f0c740 >> fffffbfff0fd64d4 ffff88003e8a6aa8 ffff88005eb4c4c8 00000000fffffff0 >> ffffffff874f6be0 ffff880034ae63a8 ffff88003da17708 ffffffff8149e73c >> Call Trace: >> [< inline >] __dump_stack lib/dump_stack.c:15 >> [<ffffffff82c8ea9f>] dump_stack+0x12e/0x18f lib/dump_stack.c:51 >> [<ffffffff8149e73c>] __setup_irq+0x11fc/0x1610 kernel/irq/manage.c:1369 >> [<ffffffff8149ef55>] request_threaded_irq+0x275/0x410 kernel/irq/manage.c:1652 >> [< inline >] request_irq include/linux/interrupt.h:147 > ... >> They appear after boot every 10 seconds. >> I am using qemu. Here are GOLDFISH related .config values: >> >> CONFIG_GOLDFISH=y >> # CONFIG_X86_GOLDFISH is not set >> CONFIG_KEYBOARD_GOLDFISH_EVENTS=y >> CONFIG_GOLDFISH_TTY=y >> CONFIG_BATTERY_GOLDFISH=y >> CONFIG_FB_GOLDFISH=y >> CONFIG_MMC_GOLDFISH=y >> CONFIG_GOLDFISH_AUDIO=y >> CONFIG_MTD_GOLDFISH_NAND=y >> CONFIG_GOLDFISH_BUS=y >> CONFIG_GOLDFISH_PIPE=y >> >> Is it a known issue? How can it be fixed? > > This is a conflict between request_irq of goldfish and 8250. Setting > SERIAL_8250_SHARE_IRQ (which is the default) should make the trace gone. I have it set, but still see the warning. $ grep "8250" .config CONFIG_SERIAL_8250=y CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y CONFIG_SERIAL_8250_PNP=y CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_DMA=y CONFIG_SERIAL_8250_PCI=y CONFIG_SERIAL_8250_CS=y CONFIG_SERIAL_8250_NR_UARTS=32 CONFIG_SERIAL_8250_RUNTIME_UARTS=4 CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_MANY_PORTS=y CONFIG_SERIAL_8250_SHARE_IRQ=y CONFIG_SERIAL_8250_DETECT_IRQ=y CONFIG_SERIAL_8250_RSA=y # CONFIG_SERIAL_8250_FSL is not set CONFIG_SERIAL_8250_DW=y CONFIG_SERIAL_8250_FINTEK=y CONFIG_SERIAL_8250_MID=y CONFIG_SERIAL_8250_MOXA=y # Non-8250 serial port support > Note that GOLDFISH=y makes sense only if you build a goldfish kernel. > I.e. setting both 8250 and goldfish does not make much sense IIRC. Won't it happen with allmodconfig which seems to enable both? $ make allmodconfig # egrep "GOLDFISH|8250" .config CONFIG_GOLDFISH=y CONFIG_X86_GOLDFISH=y CONFIG_KEYBOARD_GOLDFISH_EVENTS=m CONFIG_GOLDFISH_TTY=m CONFIG_SERIAL_8250=m CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y CONFIG_SERIAL_8250_PNP=y CONFIG_SERIAL_8250_DMA=y CONFIG_SERIAL_8250_PCI=m CONFIG_SERIAL_8250_CS=m CONFIG_SERIAL_8250_NR_UARTS=4 CONFIG_SERIAL_8250_RUNTIME_UARTS=4 CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_MANY_PORTS=y CONFIG_SERIAL_8250_SHARE_IRQ=y CONFIG_SERIAL_8250_DETECT_IRQ=y CONFIG_SERIAL_8250_RSA=y CONFIG_SERIAL_8250_BCM2835AUX=m CONFIG_SERIAL_8250_DW=m CONFIG_SERIAL_8250_RT288X=y CONFIG_SERIAL_8250_FINTEK=m CONFIG_SERIAL_8250_LPC18XX=m CONFIG_SERIAL_8250_MID=m CONFIG_SERIAL_8250_MOXA=m # Non-8250 serial port support CONFIG_BATTERY_GOLDFISH=m CONFIG_FB_GOLDFISH=m CONFIG_MMC_GOLDFISH=m CONFIG_GOLDFISH_AUDIO=m CONFIG_MTD_GOLDFISH_NAND=m CONFIG_GOLDFISH_BUS=y CONFIG_GOLDFISH_PIPE=m _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
