linux-kernel - [PATCH v3 0/2] Disable mass storage endpoints during disconnect

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Date:   Wed, 27 Oct 2021 13:10:05 -0700
From:   Wesley Cheng <quic_wcheng@...cinc.com>
To:     <balbi@...nel.org>, <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <jackp@...eaurora.org>, Wesley Cheng <quic_wcheng@...cinc.com>
Subject: [PATCH v3 0/2] Disable mass storage endpoints during disconnect

Changes in v3:
 - Modify statement for usb_ep_enable().
 - Add explicit statement mentioning that APIs can be called in atomic context.

Changes in v2:
 - Revised comments for usb_ep_disable() as it should be safe to be
   executed in atomic contexts as well.  Other FDs are currently
   calling ep disable during the disconnect event as well.

This series calls the usb_ep_disable() API directly from fsg_disable()
as there is a possibility that UDCs that support runtime PM may
already be in a suspended state, leading to HW access while resources
are disabled.

Wesley Cheng (2):
  usb: gadget: udc: core: Revise comments for USB ep enable/disable
  usb: gadget: f_mass_storage: Disable eps during disconnect

 drivers/usb/gadget/function/f_mass_storage.c | 10 ++++++++++
 drivers/usb/gadget/udc/core.c                |  4 ++--
 2 files changed, 12 insertions(+), 2 deletions(-)