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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Colin Ian King <colin.king@canonical.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 62/85] USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int
Date:   Tue, 29 Sep 2020 13:00:29 +0200
Message-Id: <20200929105931.315147158@linuxfoundation.org>
In-Reply-To: <20200929105928.198942536@linuxfoundation.org>
References: <20200929105928.198942536@linuxfoundation.org>
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From: Colin Ian King <colin.king@canonical.com>

[ Upstream commit a7f40c233a6b0540d28743267560df9cfb571ca9 ]

The comparison of hcd->irq to less than zero for an error check will
never be true because hcd->irq is an unsigned int.  Fix this by
assigning the int retval to the return of platform_get_irq and checking
this for the -ve error condition and assigning hcd->irq to retval.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: c856b4b0fdb5 ("USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe()")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200515165453.104028-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/host/ehci-mv.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index 273736e1d33fa..b29610899c9f6 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -196,11 +196,10 @@ static int mv_ehci_probe(struct platform_device *pdev)
 	hcd->rsrc_len = resource_size(r);
 	hcd->regs = ehci_mv->op_regs;
 
-	hcd->irq = platform_get_irq(pdev, 0);
-	if (hcd->irq < 0) {
-		retval = hcd->irq;
+	retval = platform_get_irq(pdev, 0);
+	if (retval < 0)
 		goto err_disable_clk;
-	}
+	hcd->irq = retval;
 
 	ehci = hcd_to_ehci(hcd);
 	ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
-- 
2.25.1