From patchwork Sun Oct 25 17:45:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 11855371 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 499C4697 for ; Sun, 25 Oct 2020 17:48:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 315642222F for ; Sun, 25 Oct 2020 17:48:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603648089; bh=rqS7t/UuqJYJA1VxRf6YfQd08Cm/w7bEF0DCTndfkEw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CpTM/kMiA8fwqnJ/UcgzqOCGGoIYRQ4iY0JQiIQj76PJpRu0WCgMzjqjq+bpMozaY QQohfQ5fNYC9yQk/UwQ0+yjPaVZCAsAlgpx60rDu8skmeZjsO8TyUY+qmxQocUF0u+ WwBL0np5T4PysSmRPqKTx1Evdsm21cgzWo8vWphM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1417876AbgJYRsF (ORCPT ); Sun, 25 Oct 2020 13:48:05 -0400 Received: from mail-lf1-f66.google.com ([209.85.167.66]:35431 "EHLO mail-lf1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387660AbgJYRqj (ORCPT ); Sun, 25 Oct 2020 13:46:39 -0400 Received: by mail-lf1-f66.google.com with SMTP id 77so8934560lfl.2; Sun, 25 Oct 2020 10:46:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=suE5N34er/4e4BcFNN72z7EVkNB7/KN/Giael/pa1Eg=; b=dcVgE0szjmvqDvecghcCSIlAMcXpIHSlb1rq1XGzxq6xciyPVWmyO4Sel255pRqtCw ackUrNRGrrq5PDD8U0kUozJlMsFf7Vhai1lz2E57YZh8q54tm8ttGRHoEJ3kTKpXNqLr 5FYmyaV0pGT41DRoKG/NSA8boKpwsVX6n3uJEiM7P0WLMM6I5/qjeTGvjClMGAFpG4Y5 8m5P0rvsibAMVJFRrjiPN++fukifcLT4ko3k7d3bphMH/DpoexAtd/uphuT9gsmjuN3c BloRiK4lQxEB8E2umsnDqQFlSAU1GZtDBG/rolV6w7UcNDkClWqcFdIceaV9s14pC6bn YFzw== X-Gm-Message-State: AOAM531JcOMNTRI2nbhBV9o/wRutGQcXIjwPsqLfgRGn3cMgwKNEADfR DSk4u5BE4xucbXbNU3N6EwIm+3m42zuQCg== X-Google-Smtp-Source: ABdhPJxIiOHtt8LWj7l6aKIHYE4NRB4+YxMnHGpo6FBMjKkduw2tIFd27OqFZ0B//u5KJzGeachBaw== X-Received: by 2002:ac2:5699:: with SMTP id 25mr4135956lfr.396.1603647996348; Sun, 25 Oct 2020 10:46:36 -0700 (PDT) Received: from xi.terra (c-beaee455.07-184-6d6c6d4.bbcust.telenor.se. [85.228.174.190]) by smtp.gmail.com with ESMTPSA id f21sm793933lfc.122.2020.10.25.10.46.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Oct 2020 10:46:34 -0700 (PDT) Received: from johan by xi.terra with local (Exim 4.93.0.4) (envelope-from ) id 1kWk6I-0007HK-Md; Sun, 25 Oct 2020 18:46:38 +0100 From: Johan Hovold To: linux-usb@vger.kernel.org Cc: "Ahmed S . Darwish" , Sebastian Andrzej Siewior , Thomas Gleixner , linux-kernel@vger.kernel.org, Johan Hovold , stable Subject: [PATCH 03/14] USB: serial: keyspan_pda: fix stalled writes Date: Sun, 25 Oct 2020 18:45:49 +0100 Message-Id: <20201025174600.27896-4-johan@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201025174600.27896-1-johan@kernel.org> References: <20201025174600.27896-1-johan@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.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 # 2.6.13 Signed-off-by: Johan Hovold --- 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; }