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([82.78.167.215]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43618057f93sm6345588f8f.24.2026.02.04.05.34.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Feb 2026 05:34:30 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: p.zabel@pengutronix.de, biju.das.jz@bp.renesas.com Cc: claudiu.beznea@tuxon.dev, linux-kernel@vger.kernel.org, Claudiu Beznea Subject: [PATCH] reset: rzg2l-usbphy-ctrl: Check pwrrdy is valid before using it Date: Wed, 4 Feb 2026 15:34:27 +0200 Message-ID: <20260204133427.3762840-1-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea The pwrrdy regmap_filed is allocated in rzg2l_usbphy_ctrl_pwrrdy_init() only if the driver data is set to RZG2L_USBPHY_CTRL_PWRRDY. Check that pwrrdy is valid before using it to avoid "Unable to handle kernel NULL pointer dereference at virtual address" errors. Fixes: c5b7cd9adefc ("reset: rzg2l-usbphy-ctrl: Add suspend/resume support") Signed-off-by: Claudiu Beznea --- drivers/reset/reset-rzg2l-usbphy-ctrl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-= rzg2l-usbphy-ctrl.c index 32bc268c9149..05dd9b4a02df 100644 --- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c +++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c @@ -136,6 +136,9 @@ static int rzg2l_usbphy_ctrl_set_pwrrdy(struct regmap_f= ield *pwrrdy, { u32 val =3D power_on ? 0 : 1; =20 + if (!pwrrdy) + return 0; + /* The initialization path guarantees that the mask is 1 bit long. */ return regmap_field_update_bits(pwrrdy, 1, val); } --=20 2.43.0