* [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
@ 2018-12-22 16:58 ` Colin King
0 siblings, 0 replies; 6+ messages in thread
From: Colin King @ 2018-12-22 16:58 UTC (permalink / raw)
To: David S . Miller, netdev; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The two different assignments for pkt_len are actually the same and
so the if statement is redundant and can be removed. Masking a u8
return value from inb() with 0xFF is also redundant and can also be
emoved. Remove the redundant code.
Detected by CoverityScan, CID#1475639 ("Identical code for different
branches")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/appletalk/cops.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index bb49f6e40a19..64c74002fe8b 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
}
/* Get response length. */
- if(lp->board==DAYNA)
- pkt_len = inb(ioaddr) & 0xFF;
- else
- pkt_len = inb(ioaddr) & 0x00FF;
+ pkt_len = inb(ioaddr);
pkt_len |= (inb(ioaddr) << 8);
/* Input IO code. */
rsp_type=inb(ioaddr);
--
2.19.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
@ 2018-12-22 16:58 ` Colin King
0 siblings, 0 replies; 6+ messages in thread
From: Colin King @ 2018-12-22 16:58 UTC (permalink / raw)
To: David S . Miller, netdev; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The two different assignments for pkt_len are actually the same and
so the if statement is redundant and can be removed. Masking a u8
return value from inb() with 0xFF is also redundant and can also be
emoved. Remove the redundant code.
Detected by CoverityScan, CID#1475639 ("Identical code for different
branches")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/appletalk/cops.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index bb49f6e40a19..64c74002fe8b 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
}
/* Get response length. */
- if(lp->board=DAYNA)
- pkt_len = inb(ioaddr) & 0xFF;
- else
- pkt_len = inb(ioaddr) & 0x00FF;
+ pkt_len = inb(ioaddr);
pkt_len |= (inb(ioaddr) << 8);
/* Input IO code. */
rsp_type=inb(ioaddr);
--
2.19.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
2018-12-22 16:58 ` Colin King
@ 2018-12-24 18:08 ` David Miller
-1 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2018-12-24 18:08 UTC (permalink / raw)
To: colin.king; +Cc: netdev, kernel-janitors, linux-kernel
From: Colin King <colin.king@canonical.com>
Date: Sat, 22 Dec 2018 16:58:41 +0000
> @@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
> }
>
> /* Get response length. */
> - if(lp->board==DAYNA)
> - pkt_len = inb(ioaddr) & 0xFF;
> - else
> - pkt_len = inb(ioaddr) & 0x00FF;
> + pkt_len = inb(ioaddr);
There are other instances of similar weird identical statements guarded
by the test on the board type being DAYNA.
For example, in cops_send_packet():
if(lp->board == DAYNA)
outb(skb->len >> 8, ioaddr);
else
outb((skb->len >> 8)&0x0FF, ioaddr);
Could you scan the rest of the driver and deal with all of these
instances in one go?
Thank you!
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
@ 2018-12-24 18:08 ` David Miller
0 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2018-12-24 18:08 UTC (permalink / raw)
To: colin.king; +Cc: netdev, kernel-janitors, linux-kernel
From: Colin King <colin.king@canonical.com>
Date: Sat, 22 Dec 2018 16:58:41 +0000
> @@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
> }
>
> /* Get response length. */
> - if(lp->board=DAYNA)
> - pkt_len = inb(ioaddr) & 0xFF;
> - else
> - pkt_len = inb(ioaddr) & 0x00FF;
> + pkt_len = inb(ioaddr);
There are other instances of similar weird identical statements guarded
by the test on the board type being DAYNA.
For example, in cops_send_packet():
if(lp->board = DAYNA)
outb(skb->len >> 8, ioaddr);
else
outb((skb->len >> 8)&0x0FF, ioaddr);
Could you scan the rest of the driver and deal with all of these
instances in one go?
Thank you!
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
2018-12-24 18:08 ` David Miller
@ 2018-12-24 18:11 ` Colin Ian King
-1 siblings, 0 replies; 6+ messages in thread
From: Colin Ian King @ 2018-12-24 18:11 UTC (permalink / raw)
To: David Miller; +Cc: netdev, kernel-janitors, linux-kernel
On 24/12/2018 18:08, David Miller wrote:
> From: Colin King <colin.king@canonical.com>
> Date: Sat, 22 Dec 2018 16:58:41 +0000
>
>> @@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
>> }
>>
>> /* Get response length. */
>> - if(lp->board==DAYNA)
>> - pkt_len = inb(ioaddr) & 0xFF;
>> - else
>> - pkt_len = inb(ioaddr) & 0x00FF;
>> + pkt_len = inb(ioaddr);
>
> There are other instances of similar weird identical statements guarded
> by the test on the board type being DAYNA.
>
> For example, in cops_send_packet():
>
> if(lp->board == DAYNA)
> outb(skb->len >> 8, ioaddr);
> else
> outb((skb->len >> 8)&0x0FF, ioaddr);
>
> Could you scan the rest of the driver and deal with all of these
> instances in one go?
Will do, probably in a day or so.
>
> Thank you!
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask
@ 2018-12-24 18:11 ` Colin Ian King
0 siblings, 0 replies; 6+ messages in thread
From: Colin Ian King @ 2018-12-24 18:11 UTC (permalink / raw)
To: David Miller; +Cc: netdev, kernel-janitors, linux-kernel
On 24/12/2018 18:08, David Miller wrote:
> From: Colin King <colin.king@canonical.com>
> Date: Sat, 22 Dec 2018 16:58:41 +0000
>
>> @@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
>> }
>>
>> /* Get response length. */
>> - if(lp->board=DAYNA)
>> - pkt_len = inb(ioaddr) & 0xFF;
>> - else
>> - pkt_len = inb(ioaddr) & 0x00FF;
>> + pkt_len = inb(ioaddr);
>
> There are other instances of similar weird identical statements guarded
> by the test on the board type being DAYNA.
>
> For example, in cops_send_packet():
>
> if(lp->board = DAYNA)
> outb(skb->len >> 8, ioaddr);
> else
> outb((skb->len >> 8)&0x0FF, ioaddr);
>
> Could you scan the rest of the driver and deal with all of these
> instances in one go?
Will do, probably in a day or so.
>
> Thank you!
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-12-24 18:11 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-12-22 16:58 [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask Colin King
2018-12-22 16:58 ` Colin King
2018-12-24 18:08 ` David Miller
2018-12-24 18:08 ` David Miller
2018-12-24 18:11 ` Colin Ian King
2018-12-24 18:11 ` Colin Ian King
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