This is a note to let you know that I've just added the patch titled
staging: comedi: dmm32at: Fix endian problem for AI command data
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-comedi-dmm32at-fix-endian-problem-for-ai-command-data.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 54999c0d94b3c26625f896f8e3460bc029821578 Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@xxxxxxxxx>
Date: Tue, 23 Feb 2021 14:30:47 +0000
Subject: staging: comedi: dmm32at: Fix endian problem for AI command data
From: Ian Abbott <abbotti@xxxxxxxxx>
commit 54999c0d94b3c26625f896f8e3460bc029821578 upstream.
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`.
[Note: the bug was introduced in commit 1700529b24cc ("staging: comedi:
dmm32at: use comedi_buf_write_samples()") but the patch applies better
to the later (but in the same kernel release) commit 0c0eadadcbe6e
("staging: comedi: dmm32at: introduce dmm32_ai_get_sample()").]
Fixes: 0c0eadadcbe6e ("staging: comedi: dmm32at: introduce dmm32_ai_get_sample()")
Cc: <stable@xxxxxxxxxxxxxxx> # 3.19+
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210223143055.257402-7-abbotti@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/dmm32at.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/comedi/drivers/dmm32at.c
+++ b/drivers/staging/comedi/drivers/dmm32at.c
@@ -404,7 +404,7 @@ static irqreturn_t dmm32at_isr(int irq,
{
struct comedi_device *dev = d;
unsigned char intstat;
- unsigned int val;
+ unsigned short val;
int i;
if (!dev->attached) {
Patches currently in stable-queue which might be from abbotti@xxxxxxxxx are
queue-5.11/staging-comedi-addi_apci_1500-fix-endian-problem-for-command-sample.patch
queue-5.11/staging-comedi-das800-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-pcl818-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-dmm32at-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-pcl711-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-das6402-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-me4000-fix-endian-problem-for-ai-command-data.patch
queue-5.11/staging-comedi-addi_apci_1032-fix-endian-problem-for-cos-sample.patch
queue-5.11/staging-comedi-adv_pci1710-fix-endian-problem-for-ai-command-data.patch
