| Message ID | 20220402175655.31512-1-fmdefrancesco@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | staging: sm750fb: Call iounmap() to free mapped bus memory | expand |
diff --git a/drivers/staging/sm750fb/sm750_hw.c b/drivers/staging/sm750fb/sm750_hw.c index a7c6eb07b62e..55cb00e8b0d1 100644 --- a/drivers/staging/sm750fb/sm750_hw.c +++ b/drivers/staging/sm750fb/sm750_hw.c @@ -81,6 +81,7 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_dev *pdev) sm750_dev->pvMem = ioremap_wc(sm750_dev->vidmem_start, sm750_dev->vidmem_size); if (!sm750_dev->pvMem) { + iounmap(sm750_dev->pvReg); pr_err("Map video memory failed\n"); ret = -EFAULT; goto exit;
If ioremap_wc() fails, the code jumps to the "exit" label and forgets to free the bus memory mapped into "sm750_dev->pvReg". Mapped bus memory must always be freed by calling iounmap(). Call iounmap(sm750_dev->pvReg) when the above-mentioned failures happen. The site of the missing iounmap() has been detected by Smatch. Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com> --- drivers/staging/sm750fb/sm750_hw.c | 1 + 1 file changed, 1 insertion(+)