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video: mb862xxfb: prevent divide by zero bug
Do a sanity check on these before using them as divisors. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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@ -328,6 +328,8 @@ static int mb862xxfb_ioctl(struct fb_info *fbi, unsigned int cmd,
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case MB862XX_L1_SET_CFG:
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if (copy_from_user(l1_cfg, argp, sizeof(*l1_cfg)))
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return -EFAULT;
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if (l1_cfg->dh == 0 || l1_cfg->dw == 0)
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return -EINVAL;
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if ((l1_cfg->sw >= l1_cfg->dw) && (l1_cfg->sh >= l1_cfg->dh)) {
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/* downscaling */
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outreg(cap, GC_CAP_CSC,
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