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[v2] drm/msm/dsi: Add parentheses to quirks check in dsi_phy_hw_v3_0_lane_settings

Message ID 20190619191722.25811-1-natechancellor@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v2] drm/msm/dsi: Add parentheses to quirks check in dsi_phy_hw_v3_0_lane_settings | expand

Commit Message

Nathan Chancellor June 19, 2019, 7:17 p.m. UTC
Clang warns:

drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c:80:6: warning: logical not is
only applied to the left hand side of this bitwise operator
[-Wlogical-not-parentheses]
        if (!phy->cfg->quirks & V3_0_0_10NM_OLD_TIMINGS_QUIRK) {
            ^                 ~
drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c:80:6: note: add parentheses
after the '!' to evaluate the bitwise operator first
        if (!phy->cfg->quirks & V3_0_0_10NM_OLD_TIMINGS_QUIRK) {
            ^
             (                                               )
drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c:80:6: note: add parentheses
around left hand side expression to silence this warning
        if (!phy->cfg->quirks & V3_0_0_10NM_OLD_TIMINGS_QUIRK) {
            ^
            (                )
1 warning generated.

Add parentheses around the bitwise AND so it is evaluated first then
negated.

Fixes: 3dbbf8f09e83 ("drm/msm/dsi: Add old timings quirk for 10nm phy")
Link: https://github.com/ClangBuiltLinux/linux/issues/547
Reported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---

v1 -> v2:

* Fix broken link (thanks to Sean for pointing it out)
* Add Sean's reviewed-by

 drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
index eb28937f4b34..47403d4f2d28 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
@@ -77,7 +77,7 @@  static void dsi_phy_hw_v3_0_lane_settings(struct msm_dsi_phy *phy)
 			      tx_dctrl[i]);
 	}
 
-	if (!phy->cfg->quirks & V3_0_0_10NM_OLD_TIMINGS_QUIRK) {
+	if (!(phy->cfg->quirks & V3_0_0_10NM_OLD_TIMINGS_QUIRK)) {
 		/* Toggle BIT 0 to release freeze I/0 */
 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x05);
 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x04);