From: Johan Hovold <johan@kernel.org>
To: linux-usb@vger.kernel.org
Cc: "Ahmed S . Darwish" <a.darwish@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Johan Hovold <johan@kernel.org>,
stable <stable@vger.kernel.org>
Subject: [PATCH 03/14] USB: serial: keyspan_pda: fix stalled writes
Date: Sun, 25 Oct 2020 18:45:49 +0100 [thread overview]
Message-ID: <20201025174600.27896-4-johan@kernel.org> (raw)
In-Reply-To: <20201025174600.27896-1-johan@kernel.org>
Make sure to clear the write-busy flag also in case no new data was
submitted due to lack of device buffer space so that writing is
resumed once space again becomes available.
Fixes: 507ca9bc0476 ("[PATCH] USB: add ability for usb-serial drivers to determine if their write urb is currently being used.")
Cc: stable <stable@vger.kernel.org> # 2.6.13
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/usb/serial/keyspan_pda.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 17b60e5a9f1f..d6ebde779e85 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -548,7 +548,7 @@ static int keyspan_pda_write(struct tty_struct *tty,
rc = count;
exit:
- if (rc < 0)
+ if (rc <= 0)
set_bit(0, &port->write_urbs_free);
return rc;
}
--
2.26.2
next prev parent reply other threads:[~2020-10-25 17:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-25 17:45 [PATCH 00/14] USB: serial: keyspan_pda: fix up write implementation Johan Hovold
2020-10-25 17:45 ` [PATCH 01/14] USB: serial: keyspan_pda: fix dropped unthrottle interrupts Johan Hovold
2020-10-25 17:45 ` [PATCH 02/14] USB: serial: keyspan_pda: fix write deadlock Johan Hovold
2020-10-25 17:45 ` Johan Hovold [this message]
2020-10-25 17:45 ` [PATCH 04/14] USB: serial: keyspan_pda: fix write-wakeup use-after-free Johan Hovold
2020-10-25 17:45 ` [PATCH 05/14] USB: serial: keyspan_pda: fix tx-unthrottle use-after-free Johan Hovold
2020-10-25 17:45 ` [PATCH 06/14] USB: serial: keyspan_pda: fix write unthrottling Johan Hovold
2020-10-25 17:45 ` [PATCH 07/14] USB: serial: keyspan_pda: refactor write-room handling Johan Hovold
2020-10-25 17:45 ` [PATCH 08/14] USB: serial: keyspan_pda: fix write implementation Johan Hovold
2020-10-25 17:45 ` [PATCH 09/14] USB: serial: keyspan_pda: increase transmitter threshold Johan Hovold
2020-10-25 17:45 ` [PATCH 10/14] USB: serial: keyspan_pda: add write-fifo support Johan Hovold
2020-10-25 17:45 ` [PATCH 11/14] USB: serial: keyspan_pda: clean up xircom/entrega support Johan Hovold
2020-10-26 12:00 ` Sebastian Andrzej Siewior
2020-10-27 8:09 ` Johan Hovold
2020-10-27 9:25 ` [PATCH v2 " Johan Hovold
2020-10-25 17:45 ` [PATCH 12/14] USB: serial: keyspan_pda: clean up comments and whitespace Johan Hovold
2020-10-25 17:45 ` [PATCH 13/14] USB: serial: keyspan_pda: use BIT() macro Johan Hovold
2020-10-25 17:46 ` [PATCH 14/14] USB: serial: keyspan_pda: drop redundant usb-serial pointer Johan Hovold
2020-10-26 12:13 ` [PATCH 00/14] USB: serial: keyspan_pda: fix up write implementation Sebastian Andrzej Siewior
2020-10-27 8:11 ` Johan Hovold
2020-10-28 9:38 ` Greg KH
2020-11-04 10:04 ` Johan Hovold
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201025174600.27896-4-johan@kernel.org \
--to=johan@kernel.org \
--cc=a.darwish@linutronix.de \
--cc=bigeasy@linutronix.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).