From: Flavio Suligoi <f.suligoi@asem.it>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Bixuan Cui <cuibixuan@huawei.com>, Andrew Lunn <andrew@lunn.ch>,
Chris Chiu <chris.chiu@canonical.com>,
Rajat Jain <rajatja@google.com>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Flavio Suligoi <f.suligoi@asem.it>
Subject: [PATCH v1] usb: core: hub: improve port over-current alert msg
Date: Tue, 5 Oct 2021 17:16:44 +0200 [thread overview]
Message-ID: <20211005151644.288932-1-f.suligoi@asem.it> (raw)
At the moment the port over-current message is
displayed only if the over-current condition is permanent.
But in case of permanent short-circuit or
over-current, some USB power-distribution switches
(such as the TPS20xx, etc.), after the over-current
detection and the consequent shutdown, return
in the normal state.
So, in these cases, the over-current error message
never appears.
To overcome this problem, the "over-current condition"
message is displayed even after some over-current events.
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
---
arch/arm64/boot/dts/Makefile | 1 +
drivers/usb/core/hub.c | 5 +++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index 639e01a4d855..bf26ce60d78a 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -8,6 +8,7 @@ subdir-y += amlogic
subdir-y += apm
subdir-y += apple
subdir-y += arm
+subdir-y += asem
subdir-y += bitmain
subdir-y += broadcom
subdir-y += cavium
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 86658a81d284..ff6c8e0e2673 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5577,7 +5577,8 @@ static void port_event(struct usb_hub *hub, int port1)
msleep(100); /* Cool down */
hub_power_on(hub, true);
hub_port_status(hub, port1, &status, &unused);
- if (status & USB_PORT_STAT_OVERCURRENT)
+ if ((status & USB_PORT_STAT_OVERCURRENT) ||
+ !(port_dev->over_current_count % 15))
dev_err(&port_dev->dev, "over-current condition\n");
}
@@ -5738,7 +5739,7 @@ static void hub_event(struct work_struct *work)
u16 status = 0;
u16 unused;
- dev_dbg(hub_dev, "over-current change\n");
+ dev_info(hub_dev, "over-current change\n");
clear_hub_feature(hdev, C_HUB_OVER_CURRENT);
msleep(500); /* Cool down */
hub_power_on(hub, true);
--
2.25.1
next reply other threads:[~2021-10-05 15:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 15:16 Flavio Suligoi [this message]
2021-10-05 15:38 ` [PATCH v1] usb: core: hub: improve port over-current alert msg Greg Kroah-Hartman
2021-10-06 9:47 ` Flavio Suligoi
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