Commit b0d5d2a7 authored Oct 27, 2021 by Wesley Cheng Committed by Greg Kroah-Hartman Oct 30, 2021

usb: gadget: udc: core: Revise comments for USB ep enable/disable



The usb_ep_disable() and usb_ep_enable() routines are being widely
used in atomic/interrupt context by function drivers.  Hence, the
statement about it being able to only run in process context may
not be true.  Add an explicit comment mentioning that it can be used
in atomic context.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Link: https://lore.kernel.org/r/1635365407-31337-2-git-send-email-quic_wcheng@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent c47055e9

drivers/usb/gadget/udc/core.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -91,7 +91,7 @@ EXPORT_SYMBOL_GPL(usb_ep_set_maxpacket_limit);
		* configurable, with more generic names like "ep-a". (remember that for
		* USB, "in" means "towards the USB host".)
		*
		* This routine must be called in process context.
		* This routine may be called in an atomic (interrupt) context.
		*
		* returns zero, or a negative error code.
		*/
		@@ -136,7 +136,7 @@ EXPORT_SYMBOL_GPL(usb_ep_enable);
		* gadget drivers must call usb_ep_enable() again before queueing
		* requests to the endpoint.
		*
		* This routine must be called in process context.
		* This routine may be called in an atomic (interrupt) context.
		*
		* returns zero, or a negative error code.
		*/