linux-kernel - [bug] radio: wl128x: sleep inside of spinlock

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Date:	Sat, 12 Mar 2011 21:08:09 +0300
From:	Vasiliy Kulikov <segoon@...nwall.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Manjunatha Halli <manjunatha_halli@...com>,
	Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org
Subject: [bug] radio: wl128x: sleep inside of spinlock

Hi,

There is a copy_to_user() call inside of spin_lock_irqsave()/spin_unlock_irqrestore():

drivers/media/radio/wl128x/fmdrv_common.c:

    /* Copies RDS data from internal buffer to user buffer */
    u32 fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file,
            u8 __user *buf, size_t count)
    {
        ...
        spin_lock_irqsave(&fmdev->rds_buff_lock, flags);
        ...
            if (copy_to_user(buf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx],
        ...
        spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
        return ret;
    }

-- 
Vasiliy
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