From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
wg@grandegger.com, kernel@martin.sperl.org,
linux-can@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/6] Add Microchip MCP25XXFD CAN driver
Date: Mon, 22 Jun 2020 14:54:15 +0200 [thread overview]
Message-ID: <0ae54858-0eb5-b3b8-c793-00a8b99c8aa5@pengutronix.de> (raw)
In-Reply-To: <20200622124347.GC3077@x1.vandijck-laurijssen.be>
On 6/22/20 2:43 PM, Kurt Van Dijck wrote:
> I get RX-0: FIFO overflows in listen-only mode (back-to-back burst of
> the single other node).
Single other node? Who's ACKing the CAN frames?
> The SPI peripheral does not use DMA :-(.
The SPI messages are quite small, so DMA wont help either. Getting rid of the
IRQ and polling for completion is the way to go.
> Do you have, by accident, some freescale SPI fixes lying around?
nope
> It's not the biggest problem on my side, but is proves the system not
> being guarded against load.
Do you have freq scaling activated?
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung West/Dortmund | Phone: +49-231-2826-924 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
next prev parent reply other threads:[~2020-06-22 12:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 7:44 Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 1/6] dt-bindings: can: Document devicetree bindings for MCP25XXFD Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 2/6] can: mcp25xxfd: Add Microchip MCP25XXFD CAN-FD driver infrastructure Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 3/6] can: mcp25xxfd: Add support for CAN reception Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 4/6] can: mcp25xxfd: Add CAN transmission support Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 5/6] can: mcp25xxfd: Optimize TEF read by avoiding unnecessary SPI transfers Manivannan Sadhasivam
2020-06-10 7:44 ` [PATCH 6/6] MAINTAINERS: Add entry for Microchip MCP25XXFD CAN network driver Manivannan Sadhasivam
2020-06-11 16:26 ` [PATCH 0/6] Add Microchip MCP25XXFD CAN driver Marc Kleine-Budde
2020-06-11 20:30 ` Marc Kleine-Budde
2020-06-12 11:27 ` Marc Kleine-Budde
2020-06-17 16:59 ` Kurt Van Dijck
2020-06-17 22:36 ` Marc Kleine-Budde
2020-06-18 12:30 ` Kurt Van Dijck
2020-06-18 12:35 ` Marc Kleine-Budde
2020-06-22 10:25 ` Kurt Van Dijck
2020-06-22 10:55 ` Marc Kleine-Budde
2020-06-22 12:30 ` Kurt Van Dijck
2020-06-22 12:43 ` Kurt Van Dijck
2020-06-22 12:54 ` Marc Kleine-Budde [this message]
2020-06-22 13:26 ` Kurt Van Dijck
2020-06-22 13:41 ` Marc Kleine-Budde
2020-06-18 8:55 ` Manivannan Sadhasivam
2020-06-20 2:43 ` Manivannan Sadhasivam
2020-06-22 11:47 ` Marc Kleine-Budde
2020-06-18 12:06 ` Manivannan Sadhasivam
2020-06-22 11:41 ` Marc Kleine-Budde
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