This is a note to let you know that I've just added the patch titled
staging: comedi: me4000: 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-me4000-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 b39dfcced399d31e7c4b7341693b18e01c8f655e Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@xxxxxxxxx>
Date: Tue, 23 Feb 2021 14:30:48 +0000
Subject: staging: comedi: me4000: Fix endian problem for AI command data
From: Ian Abbott <abbotti@xxxxxxxxx>
commit b39dfcced399d31e7c4b7341693b18e01c8f655e upstream.
The analog input subdevice supports Comedi asynchronous commands that
use Comedi's 16-bit sample format. However, the calls to
`comedi_buf_write_samples()` are 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: de88924f67d1 ("staging: comedi: me4000: use comedi_buf_write_samples()")
Cc: <stable@xxxxxxxxxxxxxxx> # 3.19+
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210223143055.257402-8-abbotti@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/me4000.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -924,7 +924,7 @@ static irqreturn_t me4000_ai_isr(int irq
struct comedi_subdevice *s = dev->read_subdev;
int i;
int c = 0;
- unsigned int lval;
+ unsigned short lval;
if (!dev->attached)
return IRQ_NONE;
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
