This is a note to let you know that I've just added the patch titled
usb: cdnsp: blocked some cdns3 specific code
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-cdnsp-blocked-some-cdns3-specific-code.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 18a6be674306c9acb05c08e5c3fd376ef50a917c Mon Sep 17 00:00:00 2001
From: Pawel Laszczak <pawell@xxxxxxxxxxx>
Date: Tue, 6 Feb 2024 11:40:18 +0100
Subject: usb: cdnsp: blocked some cdns3 specific code
From: Pawel Laszczak <pawell@xxxxxxxxxxx>
commit 18a6be674306c9acb05c08e5c3fd376ef50a917c upstream.
host.c file has some parts of code that were introduced for CDNS3 driver
and should not be used with CDNSP driver.
This patch blocks using these parts of codes by CDNSP driver.
These elements include:
- xhci_plat_cdns3_xhci object
- cdns3 specific XECP_PORT_CAP_REG register
- cdns3 specific XECP_AUX_CTRL_REG1 register
cc: stable@xxxxxxxxxxxxxxx
Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240206104018.48272-1-pawell@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/cdns3/host.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
--- a/drivers/usb/cdns3/host.c
+++ b/drivers/usb/cdns3/host.c
@@ -17,6 +17,11 @@
#include "../host/xhci.h"
#include "../host/xhci-plat.h"
+/*
+ * The XECP_PORT_CAP_REG and XECP_AUX_CTRL_REG1 exist only
+ * in Cadence USB3 dual-role controller, so it can't be used
+ * with Cadence CDNSP dual-role controller.
+ */
#define XECP_PORT_CAP_REG 0x8000
#define XECP_AUX_CTRL_REG1 0x8120
@@ -56,6 +61,8 @@ static const struct xhci_plat_priv xhci_
.resume_quirk = xhci_cdns3_resume_quirk,
};
+static const struct xhci_plat_priv xhci_plat_cdnsp_xhci;
+
static int __cdns_host_init(struct cdns *cdns)
{
struct platform_device *xhci;
@@ -80,8 +87,13 @@ static int __cdns_host_init(struct cdns
goto err1;
}
- cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
- sizeof(struct xhci_plat_priv), GFP_KERNEL);
+ if (cdns->version < CDNSP_CONTROLLER_V2)
+ cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
+ sizeof(struct xhci_plat_priv), GFP_KERNEL);
+ else
+ cdns->xhci_plat_data = kmemdup(&xhci_plat_cdnsp_xhci,
+ sizeof(struct xhci_plat_priv), GFP_KERNEL);
+
if (!cdns->xhci_plat_data) {
ret = -ENOMEM;
goto err1;
Patches currently in stable-queue which might be from pawell@xxxxxxxxxxx are
queue-5.15/usb-cdnsp-fixed-issue-with-incorrect-detecting-cdnsp-family-controllers.patch
queue-5.15/usb-cdnsp-blocked-some-cdns3-specific-code.patch
