Patch "clk: tegra: fix error return case for recalc_rate" has been added to the 4.14-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    clk: tegra: fix error return case for recalc_rate

to the 4.14-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-tegra-fix-error-return-case-for-recalc_rate.patch
and it can be found in the queue-4.14 subdirectory.

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



commit 9e481fa7cca8d68ff404795ac2da8fb2b0587306
Author: Timo Alho <talho@xxxxxxxxxx>
Date:   Tue Sep 12 14:29:50 2023 +0300

    clk: tegra: fix error return case for recalc_rate
    
    [ Upstream commit a47b44fbb13f5e7a981b4515dcddc93a321ae89c ]
    
    tegra-bpmp clocks driver makes implicit conversion of signed error
    code to unsigned value in recalc_rate operation. The behavior for
    recalc_rate, according to it's specification, should be that "If the
    driver cannot figure out a rate for this clock, it must return 0."
    
    Fixes: ca6f2796eef7 ("clk: tegra: Add BPMP clock driver")
    Signed-off-by: Timo Alho <talho@xxxxxxxxxx>
    Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230912112951.2330497-1-cyndis@xxxxxxxx
    Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c
index 6c933b0e29a3b..fcb7c599583b3 100644
--- a/drivers/clk/tegra/clk-bpmp.c
+++ b/drivers/clk/tegra/clk-bpmp.c
@@ -154,7 +154,7 @@ static unsigned long tegra_bpmp_clk_recalc_rate(struct clk_hw *hw,
 
 	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
 	if (err < 0)
-		return err;
+		return 0;
 
 	return response.rate;
 }