linux-kernel - Re: [PATCH][next] usb: gadget: net2272: remove redundant variable irqflags

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Date: Thu, 7 Mar 2024 17:51:59 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Colin Ian King <colin.i.king@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	linux-usb@...r.kernel.org, kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] usb: gadget: net2272: remove redundant variable
 irqflags

On Thu, Mar 07, 2024 at 10:51:35AM +0000, Colin Ian King wrote:
> The variable irqflags is being initialized and being bit-or'd with
> values but it is never read afterwards. The variable is redundant
> and can be removed.
> 
> Cleans up clang scan build warning:
> drivers/usb/gadget/udc/net2272.c:2610:15: warning: variable 'irqflags'
> set but not used [-Wunused-but-set-variable]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

this "problem" exists since the driver was introduced in commit
ceb80363b2ec ("USB: net2272: driver for PLX NET2272 USB device
controller"). Might be worth a Fixes: line.

I wonder if the better fix would be:

diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 12e76bb62c20..19bbc38f3d35 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -2650,7 +2650,7 @@ net2272_plat_probe(struct platform_device *pdev)
 		goto err_req;
 	}
 
-	ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW);
+	ret = net2272_probe_fin(dev, irqflags);
 	if (ret)
 		goto err_io;
 

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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