From: H Hartley Sweeten Date: Wed, 27 Jun 2012 22:04:47 +0000 (-0700) Subject: staging: comedi: adl_pci6208: fix the ao_readback variable size X-Git-Tag: firefly_0821_release~3680^2~2356^2~460 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5c67df8b98316fbfede8d4d6bac64d52d4327357;p=firefly-linux-kernel-4.4.55.git staging: comedi: adl_pci6208: fix the ao_readback variable size The 'ao_readback' variable in the private data struct is used to cache the last value written to the analog output DAC channels. The PCI-6208 has 8 analog output channels but the variable only allowed space to cache 2 values. Since the PCI-6216 board could be supported by this driver and it has 16 analog outputs, create a define for the maximum number of channels and use that to set the size of 'ao_readback'. For now, set the max to 8 to save space since the PCI-6216 is not currently supported. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/adl_pci6208.c b/drivers/staging/comedi/drivers/adl_pci6208.c index dcaebfc22586..d15f0cbc2e67 100644 --- a/drivers/staging/comedi/drivers/adl_pci6208.c +++ b/drivers/staging/comedi/drivers/adl_pci6208.c @@ -56,6 +56,8 @@ References: #define PCI6208_DIO_DI_MASK (0xf0) #define PCI6208_DIO_DI_SHIFT (4) +#define PCI6208_MAX_AO_CHANNELS 8 + struct pci6208_board { const char *name; unsigned short dev_id; @@ -72,7 +74,7 @@ static const struct pci6208_board pci6208_boards[] = { struct pci6208_private { struct pci_dev *pci_dev; - unsigned int ao_readback[2]; + unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS]; }; static int pci6208_ao_winsn(struct comedi_device *dev,