| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 082/228] video: fbdev: sm712fb: fix an issue about iounmap for a wrong address | Date | Thu, 20 Aug 2020 11:20:57 +0200 |
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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-zhengdejin5@gmail.com 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 f1dcc6766d1ef..1781ca697f66b 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; } -- 2.25.1
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