From: Dejin Zheng zhengdejin5@gmail.com
[ Upstream commit 98bd4f72988646c35569e1e838c0ab80d06c77f6 ]
the sfb->fb->screen_base is not save the value get by iounmap() when the chip id is 0x720. so iounmap() for address sfb->fb->screen_base is not right.
Fixes: 1461d6672864854 ("staging: sm7xxfb: merge sm712fb with fbdev") Cc: Andy Shevchenko andy.shevchenko@gmail.com Cc: Sudip Mukherjee sudipm.mukherjee@gmail.com Cc: Teddy Wang teddy.wang@siliconmotion.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Dejin Zheng zhengdejin5@gmail.com Signed-off-by: Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com Link: https://patchwork.freedesktop.org/patch/msgid/20200422160719.27763-1-zhengde... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/video/fbdev/sm712fb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/video/fbdev/sm712fb.c b/drivers/video/fbdev/sm712fb.c index 6a1b4a853d9ee..8cd655d6d6280 100644 --- a/drivers/video/fbdev/sm712fb.c +++ b/drivers/video/fbdev/sm712fb.c @@ -1429,6 +1429,8 @@ static int smtc_map_smem(struct smtcfb_info *sfb, static void smtc_unmap_smem(struct smtcfb_info *sfb) { if (sfb && sfb->fb->screen_base) { + if (sfb->chip_id == 0x720) + sfb->fb->screen_base -= 0x00200000; iounmap(sfb->fb->screen_base); sfb->fb->screen_base = NULL; }