From 9d5f96f61837b1242dd8c576c6110593475fcf86 Mon Sep 17 00:00:00 2001 From: Florian Tobias Schandinat Date: Mon, 25 Apr 2011 20:01:46 +0000 Subject: [PATCH] viafb: try to map less memory in case of failure The current code might result in trying to remap 512MB video ram on a 32 bit system which is quite likely to fail. This patch tries to map less of it down to 8MB as this should still be enough to get a reasonably well working framebuffer. This should make viafb work for many people without requiring them to manually allocate more space. Signed-off-by: Florian Tobias Schandinat --- drivers/video/via/via-core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c index 5b0129b42d8a..eb112b621735 100644 --- a/drivers/video/via/via-core.c +++ b/drivers/video/via/via-core.c @@ -505,7 +505,14 @@ static int __devinit via_pci_setup_mmio(struct viafb_dev *vdev) ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type); if (ret < 0) goto out_unmap; - vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len); + + /* try to map less memory on failure, 8 MB should be still enough */ + for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) { + vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len); + if (vdev->fbmem) + break; + } + if (vdev->fbmem == NULL) { ret = -ENOMEM; goto out_unmap; -- 2.20.1