From: Ian Abbott Date: Tue, 23 Feb 2021 14:30:48 +0000 (+0000) Subject: staging: comedi: me4000: Fix endian problem for AI command data X-Git-Tag: v5.12-rc3~14^2~11 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b39dfcced399d31e7c4b7341693b18e01c8f655e;p=thirdparty%2Fkernel%2Flinux.git staging: comedi: me4000: 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 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: # 3.19+ Signed-off-by: Ian Abbott Link: https://lore.kernel.org/r/20210223143055.257402-8-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index 726e40dc17b62..0d3d4cafce2e8 100644 --- 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, void *dev_id) struct comedi_subdevice *s = dev->read_subdev; int i; int c = 0; - unsigned int lval; + unsigned short lval; if (!dev->attached) return IRQ_NONE;