From 8e1a4c7f718e5de5019cb5ce6ada657ce1b5ea89 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 24 Apr 2015 09:44:15 +0200 Subject: staging: fbtft: Disable DMA support if DMA is not available If NO_DMA=y: drivers/built-in.o: In function `fbtft_framebuffer_alloc': (.text+0xb53cae): undefined reference to `dmam_alloc_coherent' As DMA support is already optional, make it depend on HAS_DMA. Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman --- drivers/staging/fbtft/fbtft-core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/staging/fbtft') diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c index 53b748b..ce64521 100644 --- a/drivers/staging/fbtft/fbtft-core.c +++ b/drivers/staging/fbtft/fbtft-core.c @@ -47,9 +47,11 @@ static unsigned long debug; module_param(debug, ulong, 0); MODULE_PARM_DESC(debug, "override device debug level"); +#ifdef CONFIG_HAS_DMA static bool dma = true; module_param(dma, bool, 0); MODULE_PARM_DESC(dma, "Use DMA buffer"); +#endif void fbtft_dbg_hex(const struct device *dev, int groupsize, @@ -856,10 +858,13 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display, #endif if (txbuflen > 0) { +#ifdef CONFIG_HAS_DMA if (dma) { dev->coherent_dma_mask = ~0; txbuf = dmam_alloc_coherent(dev, txbuflen, &par->txbuf.dma, GFP_DMA); - } else { + } else +#endif + { txbuf = devm_kzalloc(par->info->device, txbuflen, GFP_KERNEL); } if (!txbuf) -- cgit v1.1