staging: sm750fb: Call iounmap() to free mapped bus memory
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> Link: https://lore.kernel.org/r/20220402175655.31512-1-fmdefrancesco@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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