From: Greg KH <greg@kroah.com>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Colin Ian King <colin.king@canonical.com>,
Oliver Neukum <oneukum@suse.com>, Arnd Bergmann <arnd@arndb.de>,
linux-usb@vger.kernel.org
Subject: Re: [PATCH] USB: cdc-wdm: Call wake_up_all() when clearing WDM_IN_USE bit.
Date: Thu, 21 May 2020 09:33:23 +0200 [thread overview]
Message-ID: <20200521073323.GA2579717@kroah.com> (raw)
In-Reply-To: <20200520233129.3704-1-penguin-kernel@I-love.SAKURA.ne.jp>
On Thu, May 21, 2020 at 08:31:29AM +0900, Tetsuo Handa wrote:
> Since e.g. wdm_flush() calls wait_event() on WDM_IN_USE bit,
> make sure to call wake_up_all() when clearing WDM_IN_USE bit.
I'm sorry, but I don't understand what this changelog text is trying to
say. Can you reword this differently?
>
> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
And is this a bugfix? For what? Does it need to go to stable kernels?
> ---
> drivers/usb/class/cdc-wdm.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
> index e3db6fbeadef..bf2a6deb7b08 100644
> --- a/drivers/usb/class/cdc-wdm.c
> +++ b/drivers/usb/class/cdc-wdm.c
> @@ -151,7 +151,7 @@ static void wdm_out_callback(struct urb *urb)
> kfree(desc->outbuf);
> desc->outbuf = NULL;
> clear_bit(WDM_IN_USE, &desc->flags);
> - wake_up(&desc->wait);
> + wake_up_all(&desc->wait);
> }
>
> static void wdm_in_callback(struct urb *urb)
> @@ -426,6 +426,7 @@ static ssize_t wdm_write
> clear_bit(WDM_IN_USE, &desc->flags);
> dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);
> rv = usb_translate_errors(rv);
> + wake_up_all(&desc->wait);
Is this a fix for two different issues?
confused,
greg k-h
next prev parent reply other threads:[~2020-05-21 7:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-20 23:31 [PATCH] USB: cdc-wdm: Call wake_up_all() when clearing WDM_IN_USE bit Tetsuo Handa
2020-05-21 7:33 ` Greg KH [this message]
2020-05-21 10:01 ` Tetsuo Handa
2020-05-21 19:50 ` Oliver Neukum
2020-05-21 22:48 ` Tetsuo Handa
2020-05-22 8:04 ` Oliver Neukum
2020-05-22 8:26 ` Tetsuo Handa
2020-05-25 12:06 ` Oliver Neukum
2020-05-25 13:32 ` Tetsuo Handa
2020-05-27 4:47 ` Tetsuo Handa
2020-05-28 15:18 ` Andrey Konovalov
2020-05-28 16:03 ` Tetsuo Handa
2020-05-28 19:03 ` Andrey Konovalov
2020-05-28 19:40 ` Alan Stern
2020-05-28 19:51 ` Andrey Konovalov
2020-05-28 20:58 ` Alan Stern
2020-05-29 20:41 ` Andrey Konovalov
2020-05-30 0:42 ` Tetsuo Handa
2020-05-30 1:10 ` Alan Stern
2020-05-30 4:58 ` Tetsuo Handa
2020-06-24 11:57 ` Oliver Neukum
2020-06-24 12:48 ` Tetsuo Handa
2020-05-30 6:08 ` Greg Kroah-Hartman
2020-06-01 12:26 ` Andrey Konovalov
2020-05-30 15:25 ` Oliver Neukum
2020-05-30 15:47 ` Alan Stern
2020-06-08 2:24 ` Tetsuo Handa
2020-06-18 0:48 ` Tetsuo Handa
2020-06-19 13:56 ` Andrey Konovalov
2020-06-23 11:20 ` Tetsuo Handa
2020-07-02 5:44 ` Tetsuo Handa
2020-07-02 7:24 ` Oliver Neukum
2020-07-15 6:15 ` Tetsuo Handa
2020-08-10 10:47 ` Tetsuo Handa
2020-09-24 15:09 ` [PATCH] USB: cdc-wdm: Make wdm_flush() interruptible and add wdm_fsync() Tetsuo Handa
2020-09-28 14:17 ` [PATCH (repost)] " Tetsuo Handa
2020-06-25 9:56 ` [PATCH] USB: cdc-wdm: Call wake_up_all() when clearing WDM_IN_USE bit Oliver Neukum
2020-06-25 11:15 ` Tetsuo Handa
2020-07-01 7:08 ` [TEST]Re: " Oliver Neukum
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