From: Mauro Carvalho Chehab Date: Mon, 22 Jun 2015 19:40:39 +0000 (-0300) Subject: [media] saa7134: fix page size on some archs X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=816de50d35743088f18e0da9e03e3347c768b7a2;p=linux-beck.git [media] saa7134: fix page size on some archs On some archs, like tile, the PAGE_SIZE is not 4K. In the case of tile arch, it can be either 16KB or 64KB. Due to that, a warning is produced: drivers/media/pci/saa7134/saa7134.h:678:43: warning: large integer implicitly truncated to unsigned type [-Woverflow] This is actually an error, as it will write trach to the DMA size registers. The logic at saa7134-ts already does the right thing: saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff)); saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff)); /* TSNOPIT=0, TSCOLAP=0 */ saa_writeb(SAA7134_TS_DMA2, ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); So, fix the driver to take larger page sizes into account. Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/pci/saa7134/saa7134-go7007.c b/drivers/media/pci/saa7134/saa7134-go7007.c index da7c4be4bed2..8a2abb34186b 100644 --- a/drivers/media/pci/saa7134/saa7134-go7007.c +++ b/drivers/media/pci/saa7134/saa7134-go7007.c @@ -289,9 +289,9 @@ static int saa7134_go7007_stream_start(struct go7007 *go) /* Set up transfer block size */ saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 128 - 1); - saa_writeb(SAA7134_TS_DMA0, (PAGE_SIZE >> 7) - 1); - saa_writeb(SAA7134_TS_DMA1, 0); - saa_writeb(SAA7134_TS_DMA2, 0); + saa_writeb(SAA7134_TS_DMA0, ((PAGE_SIZE >> 7) - 1) & 0xff); + saa_writeb(SAA7134_TS_DMA1, (PAGE_SIZE >> 15) & 0xff); + saa_writeb(SAA7134_TS_DMA2, (PAGE_SIZE >> 31) & 0x3f); /* Enable video streaming mode */ saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_VIDEO);