From: Jiasheng Jiang <jiasheng@iscas.ac.cn> To: gregkh@linuxfoundation.org, jirislaby@kernel.org, liviu.dudau@arm.com, sudeep.holla@arm.com, lorenzo.pieralisi@arm.com Cc: linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jiasheng Jiang <jiasheng@iscas.ac.cn> Subject: [PATCH] serial: mps2-uart: Check for error irq Date: Wed, 22 Dec 2021 11:36:04 +0800 [thread overview] Message-ID: <20211222033604.1049339-1-jiasheng@iscas.ac.cn> (raw) I find that platform_get_irq() will not always succeed. It will return error irq in case there is no suitable irq. Therefore, it might be better to check it if order to avoid the use of error irq. Fixes: 041f031def33 ("serial: mps2-uart: add MPS2 UART driver") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- drivers/tty/serial/mps2-uart.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c index 587b42f754cb..117d9896051f 100644 --- a/drivers/tty/serial/mps2-uart.c +++ b/drivers/tty/serial/mps2-uart.c @@ -585,10 +585,20 @@ static int mps2_init_port(struct platform_device *pdev, if (mps_port->flags & UART_PORT_COMBINED_IRQ) { mps_port->port.irq = platform_get_irq(pdev, 0); + if (mps_port->port.irq < 0) + return mps_port->port.irq; } else { mps_port->rx_irq = platform_get_irq(pdev, 0); + if (mps_port->rx_irq < 0) + return mps_port->rx_irq; + mps_port->tx_irq = platform_get_irq(pdev, 1); + if (mps_port->tx_irq < 0) + return mps_port->tx_irq; + mps_port->port.irq = platform_get_irq(pdev, 2); + if (mps_port->port.irq < 0) + return mps_port->port.irq; } return ret; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Jiasheng Jiang <jiasheng@iscas.ac.cn> To: gregkh@linuxfoundation.org, jirislaby@kernel.org, liviu.dudau@arm.com, sudeep.holla@arm.com, lorenzo.pieralisi@arm.com Cc: linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jiasheng Jiang <jiasheng@iscas.ac.cn> Subject: [PATCH] serial: mps2-uart: Check for error irq Date: Wed, 22 Dec 2021 11:36:04 +0800 [thread overview] Message-ID: <20211222033604.1049339-1-jiasheng@iscas.ac.cn> (raw) I find that platform_get_irq() will not always succeed. It will return error irq in case there is no suitable irq. Therefore, it might be better to check it if order to avoid the use of error irq. Fixes: 041f031def33 ("serial: mps2-uart: add MPS2 UART driver") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- drivers/tty/serial/mps2-uart.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c index 587b42f754cb..117d9896051f 100644 --- a/drivers/tty/serial/mps2-uart.c +++ b/drivers/tty/serial/mps2-uart.c @@ -585,10 +585,20 @@ static int mps2_init_port(struct platform_device *pdev, if (mps_port->flags & UART_PORT_COMBINED_IRQ) { mps_port->port.irq = platform_get_irq(pdev, 0); + if (mps_port->port.irq < 0) + return mps_port->port.irq; } else { mps_port->rx_irq = platform_get_irq(pdev, 0); + if (mps_port->rx_irq < 0) + return mps_port->rx_irq; + mps_port->tx_irq = platform_get_irq(pdev, 1); + if (mps_port->tx_irq < 0) + return mps_port->tx_irq; + mps_port->port.irq = platform_get_irq(pdev, 2); + if (mps_port->port.irq < 0) + return mps_port->port.irq; } return ret; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-12-22 3:36 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-12-22 3:36 Jiasheng Jiang [this message] 2021-12-22 3:36 ` [PATCH] serial: mps2-uart: Check for error irq Jiasheng Jiang 2021-12-22 10:23 ` Vladimir Murzin 2021-12-22 10:23 ` Vladimir Murzin
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