Re: [PATCH 66/69] Revert "video: imsttfb: fix potential NULL pointer dereferences"

Rob Herring
2021-05-03T13:41:46Z

On Mon, May 3, 2021 at 7:01 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This reverts commit 1d84353d205a953e2381044953b7fa31c8c9702d.
>
> Because of recent interactions with developers from @umn.edu, all
> commits from them have been recently re-reviewed to ensure if they were
> correct or not.
>
> Upon review, this commit was found to be incorrect for the reasons
> below, so it must be reverted. It will be fixed up "correctly" in a
> later kernel change.
>
> The original commit here, while technically correct, did not fully
> handle all of the reported issues that the commit stated it was fixing,
> so revert it until it can be "fixed" fully.
>
> Note, ioremap() probably will never fail for old hardware like this, and
> if anyone actually used this hardware (a PowerMac era PCI display card),
> they would not be using fbdev anymore.
>
> Cc: Kangjie Lu <kjlu@umn.edu>
> Cc: Aditya Pakki <pakki001@umn.edu>
> Cc: Finn Thain <fthain@telegraphics.com.au>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Fixes: 1d84353d205a ("video: imsttfb: fix potential NULL pointer dereferences")
> Cc: stable <stable@vger.kernel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> drivers/video/fbdev/imsttfb.c | 5 -----
> 1 file changed, 5 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>