Sebastian Andrzej Siewior 2df6948428 USB: cdc-wdm: don't enable interrupts in USB-giveback ... In the code path __usb_hcd_giveback_urb() -> wdm_in_callback() -> service_outstanding_interrupt() The function service_outstanding_interrupt() will unconditionally enable interrupts during unlock and invoke usb_submit_urb() with GFP_KERNEL. If the HCD completes in BH (like ehci does) then the context remains atomic due local_bh_disable() and enabling interrupts does not change this. Defer the error case handling to a workqueue as suggested by Oliver Neukum. In case of an error the worker performs the read out and wakes the user. Fixes: c1da59dad0 ("cdc-wdm: Clear read pipeline in case of error") Cc: Robert Foss <robert.foss@collabora.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-06-28 19:36:07 +09:00
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cdc-acm.c	usb: cdc-acm: use irqsave() in USB's complete callback	2018-06-28 19:36:06 +09:00
cdc-acm.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cdc-wdm.c	USB: cdc-wdm: don't enable interrupts in USB-giveback	2018-06-28 19:36:07 +09:00
Kconfig	usb: fix some references for /proc/bus/usb	2017-04-18 16:54:19 +02:00
Makefile	USB: add SPDX identifiers to all remaining Makefiles	2017-11-07 15:53:48 +01:00
usblp.c	usb: usblp: use irqsave() in USB's complete callback	2018-06-28 19:36:06 +09:00
usbtmc.c	usb: usbtmc: Remove rigol_quirk	2018-05-18 15:56:40 +02:00