git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-25 00:52:45 -04:00
Code Issues Packages Projects Releases Wiki Activity

usb: host: xhci: Notify xHCI sideband on transfer ring free

Browse Source 
In the case of handling a USB bus reset, the xhci_discover_or_reset_device
can run without first notifying the xHCI sideband client driver to stop or
prevent the use of the transfer ring.  It was seen that when a bus reset
situation happened, the USB offload driver was attempting to fetch the xHCI
transfer ring information, which was already freed.

Tested-by: Puma Hsu <pumahsu@google.com>
Tested-by: Daehwan Jung <dh10.jung@samsung.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250409194804.3773260-6-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wesley Cheng
2025-04-09 12:47:38 -07:00
committed by Greg Kroah-Hartman
parent 000ab7dab5
commit b85a2ebda1
3 changed files with 60 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
include/linux/usb/xhci-sideband.h
View File

@@ -21,6 +21,20 @@ enum xhci_sideband_type {
XHCI_SIDEBAND_VENDOR,
};
enum xhci_sideband_notify_type {
XHCI_SIDEBAND_XFER_RING_FREE,
};
/**
* struct xhci_sideband_event - sideband event
* @type: notifier type
* @evt_data: event data
*/
struct xhci_sideband_event {
enum xhci_sideband_notify_type type;
void *evt_data;
};
/**
* struct xhci_sideband - representation of a sideband accessed usb device.
* @xhci: The xhci host controller the usb device is connected to
@@ -30,6 +44,7 @@ enum xhci_sideband_type {
* @type: xHCI sideband type
* @mutex: mutex for sideband operations
* @intf: USB sideband client interface
* @notify_client: callback for xHCI sideband sequences
*
* FIXME usb device accessed via sideband Keeping track of sideband accessed usb devices.
*/
@@ -44,10 +59,14 @@ struct xhci_sideband {
struct mutex mutex;
struct usb_interface *intf;
int (*notify_client)(struct usb_interface *intf,
struct xhci_sideband_event *evt);
};
struct xhci_sideband *
xhci_sideband_register(struct usb_interface *intf, enum xhci_sideband_type type);
xhci_sideband_register(struct usb_interface *intf, enum xhci_sideband_type type,
int (*notify_client)(struct usb_interface *intf,
struct xhci_sideband_event *evt));
void
xhci_sideband_unregister(struct xhci_sideband *sb);
int
@@ -71,4 +90,13 @@ void
xhci_sideband_remove_interrupter(struct xhci_sideband *sb);
int
xhci_sideband_interrupter_id(struct xhci_sideband *sb);
#if IS_ENABLED(CONFIG_USB_XHCI_SIDEBAND)
void xhci_sideband_notify_ep_ring_free(struct xhci_sideband *sb,
unsigned int ep_index);
#else
static inline void xhci_sideband_notify_ep_ring_free(struct xhci_sideband *sb,
unsigned int ep_index)
{ }
#endif /* IS_ENABLED(CONFIG_USB_XHCI_SIDEBAND) */
#endif /* __LINUX_XHCI_SIDEBAND_H */