mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 23:42:43 +00:00
62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
57 lines
1.7 KiB
Diff
57 lines
1.7 KiB
Diff
From 22198e801db7542c59098a75bdab120bcbc42652 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Wed, 30 Sep 2020 19:23:43 +0100
|
|
Subject: [PATCH] USB: gadget: f_hid: avoid crashes and log spam
|
|
|
|
Disconnecting and reconnecting the USB cable can lead to crashes and a
|
|
variety of kernel log spam. Try to fix or minimise both.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/3870
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/usb/gadget/function/f_hid.c | 18 +++++++++++++++++-
|
|
1 file changed, 17 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/usb/gadget/function/f_hid.c
|
|
+++ b/drivers/usb/gadget/function/f_hid.c
|
|
@@ -344,6 +344,11 @@ static ssize_t f_hidg_write(struct file
|
|
|
|
spin_lock_irqsave(&hidg->write_spinlock, flags);
|
|
|
|
+ if (!hidg->req) {
|
|
+ spin_unlock_irqrestore(&hidg->write_spinlock, flags);
|
|
+ return -ESHUTDOWN;
|
|
+ }
|
|
+
|
|
#define WRITE_COND (!hidg->write_pending)
|
|
try_again:
|
|
/* write queue */
|
|
@@ -364,7 +369,13 @@ try_again:
|
|
count = min_t(unsigned, count, hidg->report_length);
|
|
|
|
spin_unlock_irqrestore(&hidg->write_spinlock, flags);
|
|
- status = copy_from_user(req->buf, buffer, count);
|
|
+ if (req) {
|
|
+ status = copy_from_user(req->buf, buffer, count);
|
|
+ } else {
|
|
+ ERROR(hidg->func.config->cdev, "hidg->req is NULL\n");
|
|
+ status = -ESHUTDOWN;
|
|
+ goto release_write_pending;
|
|
+ }
|
|
|
|
if (status != 0) {
|
|
ERROR(hidg->func.config->cdev,
|
|
@@ -393,6 +404,11 @@ try_again:
|
|
|
|
spin_unlock_irqrestore(&hidg->write_spinlock, flags);
|
|
|
|
+ if (!hidg->in_ep->enabled) {
|
|
+ ERROR(hidg->func.config->cdev, "in_ep is disabled\n");
|
|
+ status = -ESHUTDOWN;
|
|
+ goto release_write_pending;
|
|
+ }
|
|
status = usb_ep_queue(hidg->in_ep, req, GFP_ATOMIC);
|
|
if (status < 0) {
|
|
ERROR(hidg->func.config->cdev,
|