In case ioremap fails, the fix releases resources and returns
-ENOMEM to avoid NULL pointer dereferences.
Signed-off-by: Kangjie Lu <redacted>
---
drivers/video/fbdev/imsttfb.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/video/fbdev/imsttfb.c b/drivers/video/fbdev/imsttfb.c
index 5d9670daf60e..2e321d73b3a5 100644
--- a/drivers/video/fbdev/imsttfb.c
+++ b/drivers/video/fbdev/imsttfb.c
@@ -1515,6 +1515,11 @@ static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
info->fix.smem_start = addr;
info->screen_base = (__u8 *)ioremap(addr, par->ramdac = IBM ?
0x400000 : 0x800000);
+ if (!info->screen_base) {
+ release_mem_region(addr, size);
+ framebuffer_release(info);
+ return -ENOMEM;
+ }
info->fix.mmio_start = addr + 0x800000;
par->dc_regs = ioremap(addr + 0x800000, 0x1000);
par->cmap_regs_phys = addr + 0x840000;--
2.17.1