Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2016-08-17 11:14:45
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On Sat, 2016-07-02 at 13:53 +0200, Thorsten Leemhuis wrote:
On 14.06.2016 18:00, Andy Shevchenko wrote:quoted
On Tue, 2016-06-14 at 10:27 -0500, dinh.linux@anniebear.net wrote:quoted
quoted
On Mon, 2016-06-13 at 21:59 -0500, Dinh Nguyen wrote:Does this mean that the 8250_dw.c driver can no longer use DMA?It means that previously the use of DMA engine whatever was used is not correct in your case. There is no issues in UART driver, the issue is in DMA controller driver. I'm working on a quirk that will allow user to enforce PIO mode for Rx/Tx or both. In that case if DMA controller can't be fixed you still might use DMA for Tx.What's the status of this issue? Just wondering, as this issue is listed in my regression reports for 4.7 and it seems nothing much happened for more than a week now – which is a bad sign as the 4.7 release seems only a week or two away.
I sent a v2 of the series for internal review, same you may found on [1]. If Heikki is okay to that I'll send it here. [1] https://bitbucket.org/andy-shev/linux/branch/topic%2Fdw%2Fqrk -- Andy Shevchenko [off-list ref] Intel Finland Oy