drm/msm/dsi: fix off by one in dsi_bus_clk_enable error handling

commit c8f01ffc83923a91e8087aaa077de13354a7aa59 upstream.

This disables a lock which wasn't enabled and it does not disable
the first lock in the array.

Fixes: 6e0eb52eba9e ("drm/msm/dsi: Parse bus clocks from a list")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211001123409.GG2283@kili
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 3b78bca0bb4d4a1c9d534d9abccfce487c621bee..77dae147caf902165241b3618532dfcd1dcaeed8 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -468,7 +468,7 @@ static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
 
        return 0;
 err:
-       for (; i > 0; i--)
+       while (--i >= 0)
                clk_disable_unprepare(msm_host->bus_clks[i]);
 
        return ret;