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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Martin Kaiser <martin@kaiser.cx>
Cc: Larry Finger <Larry.Finger@lwfinger.net>,
	linux-staging@lists.linux.dev, kernel-janitors@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Dan Carpenter <dan.carpenter@oracle.com>
Subject: Re: [PATCH 2/6] staging: rtl8188eu: fix usb_submit_urb error handling
Date: Mon, 14 Jun 2021 16:46:41 +0200	[thread overview]
Message-ID: <YMdr0alJDEGfsqOA@kroah.com> (raw)
In-Reply-To: <20210612180019.20387-2-martin@kaiser.cx>

On Sat, Jun 12, 2021 at 08:00:15PM +0200, Martin Kaiser wrote:
> -EPERM should be handled like any other error.

Why?  This is not "any other error" for the usb core, right?

> 
> Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Martin Kaiser <martin@kaiser.cx>
> ---
>  drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
> index ec07b2017fb7..0ceb05f3884f 100644
> --- a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
> +++ b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
> @@ -366,7 +366,6 @@ u32 usb_read_port(struct adapter *adapter, u32 addr, struct recv_buf *precvbuf)
>  	struct usb_device *pusbd = pdvobj->pusbdev;
>  	int err;
>  	unsigned int pipe;
> -	u32 ret = _SUCCESS;
>  
>  	if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
>  	    adapter->pwrctrlpriv.pnp_bstop_trx) {
> @@ -403,10 +402,10 @@ u32 usb_read_port(struct adapter *adapter, u32 addr, struct recv_buf *precvbuf)
>  			  precvbuf);/* context is precvbuf */
>  
>  	err = usb_submit_urb(purb, GFP_ATOMIC);
> -	if ((err) && (err != (-EPERM)))
> -		ret = _FAIL;

if -EPERM returns from this function, someone set the "reject" bit on
the urb.

Can this driver do that?  Where did this check originally come from, as
it feels like this was added for a good reason.

If this patch is "correct", I need a better changelog text explaining
why it is so :)

thanks,

greg k-h

  reply	other threads:[~2021-06-14 14:46 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-12 18:00 [PATCH 1/6] staging: rtl8188eu: remove unused hal_data_8188e members Martin Kaiser
2021-06-12 18:00 ` [PATCH 2/6] staging: rtl8188eu: fix usb_submit_urb error handling Martin Kaiser
2021-06-14 14:46   ` Greg Kroah-Hartman [this message]
2021-06-15  6:47     ` Dan Carpenter
2021-06-12 18:00 ` [PATCH 3/6] staging: rtl8188eu: remove a write-only struct member Martin Kaiser
2021-06-12 18:00 ` [PATCH 4/6] staging: rtl8188eu: remove a write-only power-index members Martin Kaiser
2021-06-12 18:00 ` [PATCH 5/6] staging: rtl8188eu: remove another write-only member Martin Kaiser
2021-06-12 18:00 ` [PATCH 6/6] staging: rtl8188eu: remove RT_TRACE and DBG_88E prints from usb_intf.c Martin Kaiser
2021-06-14 11:34   ` Dan Carpenter
2021-06-14 14:58     ` Martin Kaiser
2021-06-20 17:40 ` [PATCH v2] staging: rtl8188eu: fix usb_submit_urb error handling Martin Kaiser

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