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sm501fb: don't return zero on failure path in sm501fb_start()

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If fbmem iomemory mapping failed, sm501fb_start() breaks off
initialization, deallocates resources, but returns zero.
As a result, double deallocation can happen in sm501fb_stop().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Alexey Khoroshilov 2017-05-02 13:47:53 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 45f580c42e
commit dc85e9a874
1 changed files with 1 additions and 0 deletions
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drivers/video/fbdev/sm501fb.c
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@ -1600,6 +1600,7 @@ static int sm501fb_start(struct sm501fb_info *info,
info->fbmem = ioremap(res->start, resource_size(res));
if (info->fbmem == NULL) {
dev_err(dev, "cannot remap framebuffer\n");
ret = -ENXIO;
goto err_mem_res;
}