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Message-Id: <1396731314-7112-1-git-send-email-khoroshilov@ispras.ru> Date: Sun, 6 Apr 2014 00:55:14 +0400 From: Alexey Khoroshilov <khoroshilov@...ras.ru> To: Samuel Ortiz <sameo@...ux.intel.com>, Lee Jones <lee.jones@...aro.org> Cc: Alexey Khoroshilov <khoroshilov@...ras.ru>, linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org Subject: [PATCH] mfd: ezx-pcap: avoid calling mutex_lock() in irq handler pcap_adc_irq() calls mutex_lock(), while it is registered as nonthreaded irq handler. The patch makes a switch to threaded irq handling. Compile tested only. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru> --- drivers/mfd/ezx-pcap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c index 2ed774e7d342..b27830035e36 100644 --- a/drivers/mfd/ezx-pcap.c +++ b/drivers/mfd/ezx-pcap.c @@ -485,8 +485,8 @@ static int ezx_pcap_probe(struct spi_device *spi) adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); - ret = devm_request_irq(&spi->dev, adc_irq, pcap_adc_irq, 0, "ADC", - pcap); + ret = devm_request_threaded_irq(&spi->dev, adc_irq, NULL, + pcap_adc_irq, 0, "ADC", pcap); if (ret) goto free_irqchip; -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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