From: Alan Stern <stern@rowland.harvard.edu>
To: Sergey Shtylyov <s.shtylyov@omp.ru>
Cc: linux-usb@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Felipe Balbi <balbi@kernel.org>
Subject: Re: [PATCH v2 5/9] usb: host: ohci-tmio: add IRQ check
Date: Mon, 9 Aug 2021 16:54:38 -0400 [thread overview]
Message-ID: <20210809205438.GA560062@rowland.harvard.edu> (raw)
In-Reply-To: <9bfa4edb-6852-d948-3f57-9c486e79a208@omp.ru>
On Mon, Aug 09, 2021 at 11:41:59PM +0300, Sergey Shtylyov wrote:
> The driver neglects to check the result of platform_get_irq()'s call and
> blithely passes the negative error codes to usb_add_hcd() (which takes
> *unsigned* IRQ #), causing request_irq() that it calls to fail with
> -EINVAL, overriding an original error code. Stop calling usb_add_hcd()
> with the invalid IRQ #s.
>
> Fixes: 78c73414f4f6 ("USB: ohci: add support for tmio-ohci cell")
> Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
>
> ---
> drivers/usb/host/ohci-tmio.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> Index: usb/drivers/usb/host/ohci-tmio.c
> ===================================================================
> --- usb.orig/drivers/usb/host/ohci-tmio.c
> +++ usb/drivers/usb/host/ohci-tmio.c
> @@ -242,6 +242,8 @@ static int ohci_hcd_tmio_drv_probe(struc
> if (ret < 0)
> goto err_enable;
>
> + if (irq < 0)
> + goto err_enable;
> ret = usb_add_hcd(hcd, irq, 0);
> if (ret)
> goto err_add_hcd;
Surely this test should be placed near the start of the function, before
the call to usb_create_hcd(). There's no point in doing all the extra
work if the irq value is already invalid.
Alan Stern
next prev parent reply other threads:[~2021-08-09 20:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 20:16 [PATCH v2 0/9] Stop calling request_irq(), etc. with invalid IRQs in the USB drivers Sergey Shtylyov
2021-08-09 20:21 ` [PATCH v2 1/9] usb: dwc3: meson-g12a: add IRQ check Sergey Shtylyov
2021-08-09 20:23 ` [PATCH v2 2/9] usb: dwc3: qcom: " Sergey Shtylyov
2021-08-09 20:27 ` [PATCH v2 3/6] usb: gadget: udc: at91: " Sergey Shtylyov
2021-08-09 20:35 ` [PATCH v2 4/9] usb: gadget: udc: s3c2410: " Sergey Shtylyov
2021-08-10 6:53 ` Krzysztof Kozlowski
2021-08-12 5:40 ` Felipe Balbi
2021-08-09 20:41 ` [PATCH v2 5/9] usb: host: ohci-tmio: " Sergey Shtylyov
2021-08-09 20:54 ` Alan Stern [this message]
2021-08-09 20:45 ` [PATCH v2 6/9] usb: misc: brcmstb-usb-pinmap: " Sergey Shtylyov
2021-08-10 9:51 ` Florian Fainelli
2021-08-09 20:50 ` [PATCH v2 7/9] usb: phy: fsl-usb: " Sergey Shtylyov
2021-08-12 5:38 ` Felipe Balbi
2021-08-09 20:52 ` [PATCH v2 8/9] usb: phy: tahvo: " Sergey Shtylyov
2021-08-12 5:39 ` Felipe Balbi
2021-08-13 7:02 ` Greg Kroah-Hartman
2021-08-13 10:33 ` Sergey Shtylyov
2021-08-09 20:53 ` [PATCH v2 9/9] usb: phy: twl6030: add IRQ checks Sergey Shtylyov
2021-08-12 5:39 ` Felipe Balbi
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