diff options
authorTeddy Wang <>2017-06-30 21:57:43 +0100
committerGreg Kroah-Hartman <>2017-07-27 15:08:06 -0700
commit85643f6f50282d52c8d8cedbf958092b2a03cf7a (patch)
parent2bc52403da8a940d3ecc1b4c770cab9a650167ae (diff)
staging: sm750fb: avoid conflicting vesafb
commit 740c433ec35187b45abe08bb6c45a321a791be8e upstream. If vesafb is enabled in the config then /dev/fb0 is created by vesa and this sm750 driver gets fb1, fb2. But we need to be fb0 and fb1 to effectively work with xorg. So if it has been alloted fb1, then try to remove the other fb0. In the previous send, why #ifdef is used was asked. Answered at: Also pasting here for reference. 'Did a quick research into "why". The patch d8801e4df91e ("x86/PCI: Set IORESOURCE_ROM_SHADOW only for the default VGA device") has started setting IORESOURCE_ROM_SHADOW in flags for a default VGA device and that is being done only for x86. And so, we will need that #ifdef to check IORESOURCE_ROM_SHADOW as that needs to be checked only for a x86 and not for other arch.' Signed-off-by: Teddy Wang <> Signed-off-by: Sudip Mukherjee <> Signed-off-by: Greg Kroah-Hartman <>
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
index 7d90e250142c..86ace1449309 100644
--- a/drivers/staging/sm750fb/sm750.c
+++ b/drivers/staging/sm750fb/sm750.c
@@ -1049,6 +1049,26 @@ release_fb:
return err;
+static int lynxfb_kick_out_firmware_fb(struct pci_dev *pdev)
+ struct apertures_struct *ap;
+ bool primary = false;
+ ap = alloc_apertures(1);
+ if (!ap)
+ return -ENOMEM;
+ ap->ranges[0].base = pci_resource_start(pdev, 0);
+ ap->ranges[0].size = pci_resource_len(pdev, 0);
+#ifdef CONFIG_X86
+ primary = pdev->resource[PCI_ROM_RESOURCE].flags &
+ remove_conflicting_framebuffers(ap, "sm750_fb1", primary);
+ kfree(ap);
+ return 0;
static int lynxfb_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
@@ -1057,6 +1077,10 @@ static int lynxfb_pci_probe(struct pci_dev *pdev,
int fbidx;
int err;
+ err = lynxfb_kick_out_firmware_fb(pdev);
+ if (err)
+ return err;
/* enable device */
err = pcim_enable_device(pdev);
if (err)