From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: Re: [PATCH AUTOSEL 5.5 01/41] spi: spi-omap2-mcspi: Handle DMA size restriction on AM65x Date: Sun, 22 Mar 2020 15:37:39 -0400 Message-ID: <20200322193739.GO4189@sasha-vm> References: <20200316023319.749-1-sashal@kernel.org> <20200316115057.GB5010@sirena.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Vignesh Raghavendra , linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mark Brown Return-path: Content-Disposition: inline In-Reply-To: <20200316115057.GB5010-GFdadSzt00ze9xe1eoZjHA@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: On Mon, Mar 16, 2020 at 11:50:57AM +0000, Mark Brown wrote: >On Sun, Mar 15, 2020 at 10:32:39PM -0400, Sasha Levin wrote: >> From: Vignesh Raghavendra >> >> [ Upstream commit e4e8276a4f652be2c7bb783a0155d4adb85f5d7d ] >> >> On AM654, McSPI can only support 4K - 1 bytes per transfer when DMA is >> enabled. Therefore populate master->max_transfer_size callback to >> inform client drivers of this restriction when DMA channels are >> available. > >As ever this only provides information to other drivers which may be >buggy. I'll drop it, thanks! -- Thanks, Sasha