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Thu, 01 May 2025 08:02:11 -0700 (PDT) From: Krzysztof Kozlowski Date: Thu, 01 May 2025 17:02:01 +0200 Subject: [PATCH v2 3/3] spi: cadence-quadspi: Assume device could match via platform Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250501-n-smatch-fixes-v2-3-d2ad9c1f2e67@linaro.org> References: <20250501-n-smatch-fixes-v2-0-d2ad9c1f2e67@linaro.org> In-Reply-To: <20250501-n-smatch-fixes-v2-0-d2ad9c1f2e67@linaro.org> To: Mark Brown , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , David Rhodes , Richard Fitzgerald Cc: linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, patches@opensource.cirrus.com, Krzysztof Kozlowski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1483; i=krzysztof.kozlowski@linaro.org; h=from:subject:message-id; bh=B3v13NXCER5k3tKhwX7vqb0mye7ltzvO1U+oUASNdgU=; b=owEBbQKS/ZANAwAKAcE3ZuaGi4PXAcsmYgBoE4zs9gNikiLaGr7Pqc78Xp2+VrLMMAjp88bwS hB6yBtxryWJAjMEAAEKAB0WIQTd0mIoPREbIztuuKjBN2bmhouD1wUCaBOM7AAKCRDBN2bmhouD 11VpD/wNiGdprHFBTqCt2CnLkmyOfWKabgzUmeNPQie00KzOgJVHUUjWU4fQaeI30mVt9rfpu10 llp9+NafbiQoqC/9fHr8ckF1T8bTk0UxAAmqyeIoxupKtWuT8SpFRVhzfWUWaxuAzgzji3dPDHK ljhiroQ5K9bYLCIjJ3DMJe2ajG458Q2H7Hj2Pgm0oyGZP6zVIA7fnv4p26E2xOIBkGaZWo57pFe bjmmIUqrklHrbwgPT9JjxthHgNtY9wYmOEietCJq06B9o3ATCvBI8OsvrP2VaachROYBHaEKiM8 9kifoZWrIGLKbeMbGnJwami0uAWC1TckkzhDv7mVsqLKfToy9rFkSof7/756aD555PbJ9WQ55WJ ctyJMPc/lNwv7/qwagVd5gAb0lMZ3MWpgS+ZwEW4JQADcjC/B2Qvl2z8S05COKdPgBV8VaX7Y8p UuPfvFDlcmfyuy9ehhlRV3iO/nErNWoZK3M5rfTS/3jBgM2xcLy3CkdJ6+r6Ec2DJBVGtKG65Tu Tg87N0s6R+JDC6j2EAjrHOK2giHvXT23YzVbekBecuiJUBmydauJwxTtDQmzpDRFbWz0cB9v+ti 5xN+x7ArX5Zwm4w2++0vpqUKE32Jr1CVH3vNQcABVwPWPvo6bd0gkioWh9nKgr83W+A39JkCwYD 09YLX6LPBaP50/g== X-Developer-Key: i=krzysztof.kozlowski@linaro.org; a=openpgp; fpr=9BD07E0E0C51F8D59677B7541B93437D3B41629B Driver has only of_device_id table, however it also has MODULE_ALIAS() for platform name, thus assume there is a configuration where this can be loaded outside of OF system. In such case of_device_get_match_data() will return NULL, which is already checked in one place of probe() function but not in the other, leading to Smatch warning: drivers/spi/spi-cadence-quadspi.c:1942 cqspi_probe() error: we previously= assumed 'ddata' could be null (see line 1885) Driver should be consistent, so assume device can be matched via platform bus and of_device_get_match_data() can indeed return NULL. This is also possible with malformed DTS on OF-platform: no unit address and device node name matching driver name. Signed-off-by: Krzysztof Kozlowski --- drivers/spi/spi-cadence-quadspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-qu= adspi.c index c90462783b3f9f05e477d337ab4187224992c0a0..fe0f122f07b0206e80cf89bd031= 106bf8051c789 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1949,7 +1949,7 @@ static int cqspi_probe(struct platform_device *pdev) =20 host->num_chipselect =3D cqspi->num_chipselect; =20 - if (ddata->quirks & CQSPI_SUPPORT_DEVICE_RESET) + if (ddata && (ddata->quirks & CQSPI_SUPPORT_DEVICE_RESET)) cqspi_device_reset(cqspi); =20 if (cqspi->use_direct_mode) { --=20 2.45.2