Patch "clk: mediatek: fix of_iomap memory leak" has been added to the 6.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    clk: mediatek: fix of_iomap memory leak

to the 6.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     clk-mediatek-fix-of_iomap-memory-leak.patch
and it can be found in the queue-6.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ffab5b504089c874f308a51d0da1a20e479e5590
Author: Bosi Zhang <u201911157@xxxxxxxxxxx>
Date:   Sat Apr 22 08:43:31 2023 +0000

    clk: mediatek: fix of_iomap memory leak
    
    [ Upstream commit 3db7285e044144fd88a356f5b641b9cd4b231a77 ]
    
    Smatch reports:
    drivers/clk/mediatek/clk-mtk.c:583 mtk_clk_simple_probe() warn:
        'base' from of_iomap() not released on lines: 496.
    
    This problem was also found in linux-next. In mtk_clk_simple_probe(),
    base is not released when handling errors
    if clk_data is not existed, which may cause a leak.
    So free_base should be added here to release base.
    
    Fixes: c58cd0e40ffa ("clk: mediatek: Add mtk_clk_simple_probe() to simplify clock providers")
    Signed-off-by: Bosi Zhang <u201911157@xxxxxxxxxxx>
    Reviewed-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230422084331.47198-1-u201911157@xxxxxxxxxxx
    Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index fd2214c3242f2..3c50f48e93a7b 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -500,8 +500,10 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
 	num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
 
 	clk_data = mtk_alloc_clk_data(num_clks);
-	if (!clk_data)
-		return -ENOMEM;
+	if (!clk_data) {
+		r = -ENOMEM;
+		goto free_base;
+	}
 
 	if (mcd->fixed_clks) {
 		r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
@@ -599,6 +601,7 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
 					      mcd->num_fixed_clks, clk_data);
 free_data:
 	mtk_free_clk_data(clk_data);
+free_base:
 	if (mcd->shared_io && base)
 		iounmap(base);
 	return r;