From: Rui Miguel Silva <rui.silva@linaro.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org, Rui Miguel Silva <rui.silva@linaro.org>
Subject: [PATCH 5/5] usb: isp1760: clean never read udc_enabled warning
Date: Thu, 19 Aug 2021 19:09:29 +0100 [thread overview]
Message-ID: <20210819180929.1327349-6-rui.silva@linaro.org> (raw)
In-Reply-To: <20210819180929.1327349-1-rui.silva@linaro.org>
When CONFIG_USB_ISP1761_UDC is not enabled the udc_enabled variable is
never used since it is short circuited before in the logic operations.
This would trigger the following warning by clang analyzer:
drivers/usb/isp1760/isp1760-core.c:490:2: warning: Value stored to 'udc_enabled' is never read [clang-analyzer-deadcode.DeadStores]
udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) ||
^
drivers/usb/isp1760/isp1760-core.c:490:2: note: Value stored to 'udc_enabled' is never read
Just swap the other of the operands in the logic operations.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
---
drivers/usb/isp1760/isp1760-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c
index ff07e2890692..cb70f9d63cdd 100644
--- a/drivers/usb/isp1760/isp1760-core.c
+++ b/drivers/usb/isp1760/isp1760-core.c
@@ -491,7 +491,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
(devflags & ISP1760_FLAG_ISP1761));
if ((!IS_ENABLED(CONFIG_USB_ISP1760_HCD) || usb_disabled()) &&
- (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || !udc_enabled))
+ (!udc_enabled || !IS_ENABLED(CONFIG_USB_ISP1761_UDC)))
return -ENODEV;
isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
@@ -571,7 +571,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
return ret;
}
- if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && udc_enabled) {
+ if (udc_enabled && IS_ENABLED(CONFIG_USB_ISP1761_UDC)) {
ret = isp1760_udc_register(isp, irq, irqflags);
if (ret < 0) {
isp1760_hcd_unregister(hcd);
--
2.33.0
prev parent reply other threads:[~2021-08-19 18:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 18:09 [PATCH 0/5] usb: isp1760: clang analyzer fixes Rui Miguel Silva
2021-08-19 18:09 ` [PATCH 1/5] usb: isp1760: ignore return value for bus change pattern Rui Miguel Silva
2021-08-19 18:09 ` [PATCH 2/5] usb: isp1760: check maxpacketsize before using it Rui Miguel Silva
2021-08-19 18:09 ` [PATCH 3/5] usb: isp1760: do not reset retval Rui Miguel Silva
2021-08-19 18:09 ` [PATCH 4/5] usb: isp1760: do not shift in uninitialized slot Rui Miguel Silva
2021-08-19 18:09 ` Rui Miguel Silva [this message]
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