f6cd378372
When runtime PM is enabled by default for input devices, X hangs in wacom open: [<ffffffff814a00ea>] mutex_lock+0x1a/0x40 [<ffffffffa02bc94b>] wacom_resume+0x3b/0x90 [wacom] [<ffffffff81327a32>] usb_resume_interface+0xd2/0x190 [<ffffffff81327b5d>] usb_resume_both+0x6d/0x110 [<ffffffff81327c24>] usb_runtime_resume+0x24/0x40 [<ffffffff8130a2cf>] __pm_runtime_resume+0x26f/0x450 [<ffffffff8130a23a>] __pm_runtime_resume+0x1da/0x450 [<ffffffff8130a53a>] pm_runtime_resume+0x2a/0x50 [<ffffffff81328176>] usb_autopm_get_interface+0x26/0x60 [<ffffffffa02bc626>] wacom_open+0x36/0x90 [wacom] wacom_open() takes wacom->lock and calls usb_autopm_get_interface(), which in turn calls wacom_resume() which tries to acquire the lock again. The fix is to call usb_autopm_get_interface() first, before we take the lock. Since we do not do usb_autopm_put_interface() until wacom_close() is called runtime PM is effectively disabled for the driver, however changing it now would risk regressions so the complete fix will have to wait till the next merge window. Reported-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru> |
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| .. | ||
| acecad.c | ||
| aiptek.c | ||
| gtco.c | ||
| kbtab.c | ||
| Kconfig | ||
| Makefile | ||
| wacom.h | ||
| wacom_sys.c | ||
| wacom_wac.c | ||
| wacom_wac.h | ||