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Wed, 04 Mar 2026 04:47:38 -0800 (PST) From: Felix Gu Date: Wed, 04 Mar 2026 20:47:19 +0800 Subject: [PATCH v2 1/3] spi: nxp-xspi: Use reinit_completion() for repeated operations 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: <20260304-spi-nxp-v2-1-cd7d7726a27e@gmail.com> References: <20260304-spi-nxp-v2-0-cd7d7726a27e@gmail.com> In-Reply-To: <20260304-spi-nxp-v2-0-cd7d7726a27e@gmail.com> To: Han Xu , Haibo Chen , Mark Brown , Frank Li , Yogesh Gaur , Yogesh Narayan Gaur , Boris Brezillon , Frieder Schrempf Cc: linux-spi@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1772628443; l=1530; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=bhwo7r9j37LyAs4Cos8ri5eXa2weRve1tYt/Mk3XGVE=; b=UXeHZ7i8c5JkwX6pvPTKD0/+H4rZvNXPd4odiwy7izmbwaQIhobe5vN0odSCPtB2GwkiVvVdT yd7yQZUlfIzCwmRpJyL7jb47up+yXAW3H/ST92CfQtRicN7Lo3jKNp1 X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= The driver currently calls init_completion() during every spi_mem_op. Tchnically it may work, but it's not the recommended pattern. According to the kernel documentation: Calling init_completion() on the same completion object twice is most likely a bug as it re-initializes the queue to an empty queue and enqueued tasks could get "lost" - use reinit_completion() in that case, but be aware of other races. So moves the initial initialization to probe function and uses reinit_completion() for subsequent operations. Fixes: 29c8c00d9f9d ("spi: add driver for NXP XSPI controller") Reviewed-by: Haibo Chen Signed-off-by: Felix Gu --- drivers/spi/spi-nxp-xspi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-nxp-xspi.c b/drivers/spi/spi-nxp-xspi.c index 06fcdf22990b..385302a6e62f 100644 --- a/drivers/spi/spi-nxp-xspi.c +++ b/drivers/spi/spi-nxp-xspi.c @@ -958,7 +958,7 @@ static int nxp_xspi_do_op(struct nxp_xspi *xspi, const = struct spi_mem_op *op) writel(reg, base + XSPI_RBCT); } =20 - init_completion(&xspi->c); + reinit_completion(&xspi->c); =20 /* Config the data address */ writel(op->addr.val + xspi->memmap_phy, base + XSPI_SFP_TG_SFAR); @@ -1273,6 +1273,7 @@ static int nxp_xspi_probe(struct platform_device *pde= v) =20 nxp_xspi_default_setup(xspi); =20 + init_completion(&xspi->c); ret =3D devm_request_irq(dev, irq, nxp_xspi_irq_handler, 0, pdev->name, xspi); if (ret) --=20 2.43.0