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patch "staging: comedi: das800: Fix endian problem for AI command data" added to staging-linus

PATCH [email protected] 1 participant 1 message Mar 3, 2021

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This is a note to let you know that I've just added the patch titled

staging: comedi: das800: Fix endian problem for AI command data

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 4ed84e4c429fbe8453f88276cc48caecd97127de Mon Sep 17 00:00:00 2001
From: Ian Abbott <[email protected]>
Date: Tue, 23 Feb 2021 14:30:46 +0000
Subject: staging: comedi: das800: Fix endian problem for AI command data

The analog input subdevice supports Comedi asynchronous commands that use Comedi's 16-bit sample format. However, the call to comedi_buf_write_samples() is passing the address of a 32-bit integer variable. On bigendian machines, this will copy 2 bytes from the wrong end of the 32-bit value. Fix it by changing the type of the variable holding the sample value to unsigned short.

Fixes ad9eb43c93d8 ("staging: comedi: das800: use comedi_buf_write_samples()")
Cc <[email protected]> # 3.19+
---
 drivers/staging/comedi/drivers/das800.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/staging/comedi/drivers/das800.c +1 -1
index 4ea100ff6930..2881808d6606 100644
@@ -427,7 +427,7 @@ static irqreturn_t das800_interrupt(int irq, void *d)
 	struct comedi_cmd *cmd;
 	unsigned long irq_flags;
 	unsigned int status;
-	unsigned int val;
+	unsigned short val;
 	bool fifo_empty;
 	bool fifo_overflow;
 	int i;
Signature · 1 line
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