linux-kernel - [PATCH v2] staging: comedi: dt282x: fix IRQ assignment for dev->irq.

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Message-Id: <8eb6747b25cfb3f380567fe0c64b89b2574cf547.1507314070.git.arvind.yadav.cs@gmail.com>
Date:   Fri,  6 Oct 2017 23:55:56 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     abbotti@....co.uk, hsweeten@...ionengravers.com,
        gregkh@...uxfoundation.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: comedi: dt282x: fix IRQ assignment for dev->irq.

Here, dev->irq is not assigned with irq. comedi_legacy_detach()
is using dev->irq for release irq and dt282x_attach() is using dev->irq
for initialize comedi_subdevice.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
changes in v2:
	comedi_isadma_alloc() can fail. adding dev->irq assignment after
        successful return of comedi_isadma_alloc().

 drivers/staging/comedi/drivers/dt282x.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/comedi/drivers/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c
index d5295bb..217a4b8 100644
--- a/drivers/staging/comedi/drivers/dt282x.c
+++ b/drivers/staging/comedi/drivers/dt282x.c
@@ -1062,6 +1062,8 @@ static void dt282x_alloc_dma(struct comedi_device *dev,
 					   PAGE_SIZE, 0);
 	if (!devpriv->dma)
 		free_irq(irq_num, dev);
+	else
+		dev->irq = irq_num;
 }
 
 static void dt282x_free_dma(struct comedi_device *dev)
-- 
2.7.4