Em Mon, 07 May 2018 16:26:08 +0300 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> escreveu: > Hi Mauro, > > On Saturday, 5 May 2018 19:08:15 EEST Mauro Carvalho Chehab wrote: > > There was a recent discussion about the use/abuse of GFP_DMA flag when > > allocating memories at LSF/MM 2018 (see Luis notes enclosed). > > > > The idea seems to be to remove it, using CMA instead. Before doing that, > > better to check if what we have on media is are valid use cases for it, or > > if it is there just due to some misunderstanding (or because it was > > copied from some other code). > > > > Hans de Goede sent us today a patch stopping abuse at gspca, and I'm > > also posting today two other patches meant to stop abuse of it on USB > > drivers. Still, there are 4 platform drivers using it: > > > > $ git grep -l -E "GFP_DMA\\b" drivers/media/ > > drivers/media/platform/omap3isp/ispstat.c > > drivers/media/platform/sti/bdisp/bdisp-hw.c > > drivers/media/platform/sti/hva/hva-mem.c > > drivers/media/spi/cxd2880-spi.c > > > > Could you please check if GFP_DMA is really needed there, or if it is > > just because of some cut-and-paste from some other place? > > I started looking at that for the omap3isp driver but Sakari beat me at > submitting a patch. GFP_DMA isn't needed for omap3isp. > Thank you both for looking into it. Regards, Mauro Thanks, Mauro
