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Re: [PATCH]hostap:hostap_ioctl.c Fix variable 'ret' set but not used

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On 08/02/2010 05:16 PM, Luis R. Rodriguez wrote:
On Mon, Aug 2, 2010 at 5:15 PM, Luis R. Rodriguez<mcgrof@xxxxxxxxx>  wrote:
On Mon, Aug 2, 2010 at 5:04 PM, Justin P. Mattock
<justinmattock@xxxxxxxxx>  wrote:
The below patch fixes a warning message generated by GCC:
  CC [M]  drivers/net/wireless/hostap/hostap_ioctl.o
drivers/net/wireless/hostap/hostap_ioctl.c: In function 'prism2_request_scan':
drivers/net/wireless/hostap/hostap_ioctl.c:1666:6: warning: variable 'ret' set but not used

Keep in mind Im not sure if this is the right fix for this, so please
feedback is appreciated.

Signed-off-by: Justin P. Mattock<justinmattock@xxxxxxxxx>

---
  drivers/net/wireless/hostap/hostap_ioctl.c |    3 +--
  1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/hostap/hostap_ioctl.c b/drivers/net/wireless/hostap/hostap_ioctl.c
index a85e43a..27d462f 100644
--- a/drivers/net/wireless/hostap/hostap_ioctl.c
+++ b/drivers/net/wireless/hostap/hostap_ioctl.c
@@ -1663,7 +1663,6 @@ static int prism2_request_scan(struct net_device *dev)
        struct hostap_interface *iface;
        local_info_t *local;
        struct hfa384x_scan_request scan_req;
-       int ret = 0;

        iface = netdev_priv(dev);
        local = iface->local;
@@ -1689,7 +1688,7 @@ static int prism2_request_scan(struct net_device *dev)
        if (local->func->set_rid(dev, HFA384X_RID_SCANREQUEST,&scan_req,
                                 sizeof(scan_req))) {
                printk(KERN_DEBUG "SCANREQUEST failed\n");
-               ret = -EINVAL;
+               return -EINVAL;
        }

        if (!local->host_roaming)

NACK please read the code instead of just patching blindly to cure a
compile issue. For example read this big block:

I suppose I did look blindly.. the whole ret = 0; then ret = *
got me.. then I figured maybe its just a return.



        /* FIX:
         * It seems to be enough to set roaming mode for a short moment to
         * host-based and then setup scanrequest data and return the mode to
         * firmware-based.
         *
         * Master mode would need to drop to Managed mode for a short while
         * to make scanning work.. Or sweep through the different channels and
         * use passive scan based on beacons. */

So.. it seems to me you likely want to flip back to
HFA384X_ROAMING_FIRMWARE *after* you've tried to issue the
HFA384X_RID_SCANREQUEST, even if it has failed. So the compile fix
should require just changing the last return statement of the function
to return ret value.

so this is a simple return ret;


And for 802.11 there is no need to cc netdev and lkml. Just use linux-wireless.

   Luis


is netdev even used nowadays?
anyways I'll resend this. Thanks for the feedback and info..

Justin P. Mattock
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