Re: [PATCH 2/2] staging: comedi: drop unused variable from struct 'ni_private'

From: Ian Abbott
Date: Wed Feb 08 2017 - 12:41:09 EST


On 08/02/2017 16:55, Karthik Nayak wrote:
Drop the 'serial_number' variable from the struct 'ni_private' since
its never used after assignment.

Signed-off-by: Karthik Nayak <Karthik.188@xxxxxxxxx>
---

This is to be based on top of "staging: comedi: Fix incorrect type assignment"
to which this is replied to.

drivers/staging/comedi/drivers/ni_pcimio.c | 3 +--
drivers/staging/comedi/drivers/ni_stc.h | 1 -
2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_pcimio.c b/drivers/staging/comedi/drivers/ni_pcimio.c
index 4f45a5c230ad..da4d3da071eb 100644
--- a/drivers/staging/comedi/drivers/ni_pcimio.c
+++ b/drivers/staging/comedi/drivers/ni_pcimio.c
@@ -1222,12 +1222,11 @@ static void m_series_init_eeprom_buffer(struct comedi_device *dev)
writel(0x1 | old_iodwcr1_bits, mite->mmio + MITE_IODWCR_1);
writel(0xf, mite->mmio + 0x30);


I think it would be preferable to remove the code from here ...

- BUG_ON(serial_number_eeprom_length > sizeof(devpriv->serial_number));
+ BUG_ON(serial_number_eeprom_length > sizeof(serial_number));
for (i = 0; i < serial_number_eeprom_length; ++i) {
char *byte_ptr = (char *)&serial_number + i;
*byte_ptr = ni_readb(dev, serial_number_eeprom_offset + i);
}
- devpriv->serial_number = be32_to_cpu(serial_number);

... to here. And remove the serial_number_eeprom_length, serial_number_eeprom_offset, and serial_number variables too. There is no need to continue reading the serial number bytes from the EEPROM.


for (i = 0; i < M_SERIES_EEPROM_SIZE; ++i)
devpriv->eeprom_buffer[i] = ni_readb(dev, Start_Cal_EEPROM + i);
diff --git a/drivers/staging/comedi/drivers/ni_stc.h b/drivers/staging/comedi/drivers/ni_stc.h
index b5eca0da71eb..61138e86a455 100644
--- a/drivers/staging/comedi/drivers/ni_stc.h
+++ b/drivers/staging/comedi/drivers/ni_stc.h
@@ -1031,7 +1031,6 @@ struct ni_private {

unsigned short ai_fifo_buffer[0x2000];
u8 eeprom_buffer[M_SERIES_EEPROM_SIZE];
- unsigned int serial_number;

struct mite *mite;
struct mite_channel *ai_mite_chan;


--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Web: http://www.mev.co.uk/ )=-