From: Soren Brinkmann <soren.brinkmann@xilinx.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jslaby@suse.com>
CC: Michal Simek <michal.simek@xilinx.com>, <linux-serial@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
        "Peter Hurley" <peter@hurleysoftware.com>,
        Soren Brinkmann <soren.brinkmann@xilinx.com>
Subject: [PATCH LINUX v3 00/10] tty: xuartps: Fix lock ups
Date: Sat, 21 Nov 2015 18:59:22 -0800
Message-ID: <1448161172-19717-1-git-send-email-soren.brinkmann@xilinx.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2015 02:58:24.2707
 (UTC)
X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.60.83];Helo=[xsj-pvapsmtpgw01]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1NAM02HT142
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2161
Lines: 68

Hi,

here is v3 of this series. It's largely the same as before, but I
adjusted 'tty: xuartps: Don't consider circular buffer when enabling
transmitter' according to Peter's suggestions.

I also spent some time trying to get Peter's test for flow control and
xchar running. The xchar thing fails and will need some more work, but I
think in general it should be possible to get it to work.
The flow control test passes:

root@Xilinx-ZC1751-DC1:~# ./flow /dev/ttyPS0
Test flow control on /dev/ttyPS0
begin test1
patterns sent: 223  recvd: 208
read distribution: 1   = 0
                   2+  = 0
                   4+  = 0
                   8+  = 0
                  16+  = 0
                  32+  = 643
                  64+  = 0
                 128+  = 0
                 256+  = 0
                 512+  = 0
PASSED

root@Xilinx-ZC1751-DC1:~# ./flow /dev/ttyPS1
Test flow control on /dev/ttyPS1
begin test1
patterns sent: 223  recvd: 208
read distribution: 1   = 0
                   2+  = 0
                   4+  = 0
                   8+  = 0
                  16+  = 0
                  32+  = 643
                  64+  = 0
                 128+  = 0
                 256+  = 0
                 512+  = 0
PASSED

	Sören

Sören Brinkmann (10):
  tty: xuartps: Beautify read-modify writes
  tty: xuartps: Use spinlock to serialize HW access
  tty: xuartps: Don't consider circular buffer when enabling transmitter
  tty: xuartps: Clear interrupt status register in shutdown
  tty: xuartps: Improve startup function
  tty: xuartps: Keep lock for whole ISR
  tty: xuartps: Acquire port lock for shutdown
  tty: xuartps: Move RX path into helper function
  tty: xuartps: Only handle RX IRQs when RX is enabled
  tty: xuartps: Cleanup: Reformat if-else

 drivers/tty/serial/xilinx_uartps.c | 246 +++++++++++++++++++++----------------
 1 file changed, 137 insertions(+), 109 deletions(-)

-- 
2.6.3.3.g9bb996a

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/