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

stable inclusion
from stable-5.10.75
commit c6b2400095ba232b1f2a0a499c2d7847940a9a2e
bugzilla: 182987 https://gitee.com/openeuler/kernel/issues/I4I3MP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c6b2400095ba232b1f2a0a499c2d7847940a9a2e

--------------------------------

commit c8f01ffc upstream.

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

Fixes: 6e0eb52e ("drm/msm/dsi: Parse bus clocks from a list")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211001123409.GG2283@kiliSigned-off-by: NDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: NRob Clark <robdclark@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -464,7 +464,7 @@ 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;