linux-kernel - [PATCH] xhci: Don't show warning for reinit on known broken suspend

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Message-ID: <20220913203515.451-1-mario.limonciello@amd.com>
Date:   Tue, 13 Sep 2022 15:35:15 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <mario.limonciello@....com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Puma Hsu <pumahsu@...gle.com>
CC:     "Artem S . Tashkinov" <aros@....com>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] xhci: Don't show warning for reinit on known broken suspend

commit 8b328f8002bc ("xhci: re-initialize the HC during resume if HCE was
set") introduced a new warning message when the host controller error
was set and re-initializing.

This is expected behavior on some designs which already set
`xhci->broken_suspend` so the new warning is alarming to some users.

Modify the code to only show the warning if this was a surprising behavior
to the XHCI driver.

Fixes: 8b328f8002bc ("xhci: re-initialize the HC during resume if HCE was set")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216470
Reported-by: Artem S. Tashkinov <aros@....com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/usb/host/xhci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 38649284ff88..a7ef675f00fd 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1183,7 +1183,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 	/* re-initialize the HC on Restore Error, or Host Controller Error */
 	if (temp & (STS_SRE | STS_HCE)) {
 		reinit_xhc = true;
-		xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp);
+		if (!xhci->broken_suspend)
+			xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp);
 	}
 
 	if (reinit_xhc) {
-- 
2.34.1