[PATCH 1/1] V4L: rocket, switch sleep_on to completion - Kernel

This is a discussion on [PATCH 1/1] V4L: rocket, switch sleep_on to completion - Kernel ; rocket, switch sleep_on to completion - sleep_on is deprecated and racy, use completion instead - also check retval of interruptible function and return ERESTARTSYS eventually Signed-off-by: Jiri Slaby --- commit 6e42c2183befe136d85e6a8708ee4eabc543774b tree 4a2b307dc66e1197b67afd6663e5dca7dee7f5e6 parent 9936225b4a065eec6eccd9700a680cc840280fdb author Jiri Slaby Mon, 08 ...

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Thread: [PATCH 1/1] V4L: rocket, switch sleep_on to completion

  1. [PATCH 1/1] V4L: rocket, switch sleep_on to completion

    rocket, switch sleep_on to completion

    - sleep_on is deprecated and racy, use completion instead
    - also check retval of interruptible function and return ERESTARTSYS
    eventually

    Signed-off-by: Jiri Slaby

    ---
    commit 6e42c2183befe136d85e6a8708ee4eabc543774b
    tree 4a2b307dc66e1197b67afd6663e5dca7dee7f5e6
    parent 9936225b4a065eec6eccd9700a680cc840280fdb
    author Jiri Slaby Mon, 08 Oct 2007 13:28:51 +0200
    committer Jiri Slaby Mon, 08 Oct 2007 13:28:51 +0200

    drivers/char/rocket.c | 12 ++++++++----
    drivers/char/rocket_int.h | 7 +------
    2 files changed, 9 insertions(+), 10 deletions(-)

    diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
    index 56cbba7..d790b08 100644
    --- a/drivers/char/rocket.c
    +++ b/drivers/char/rocket.c
    @@ -84,6 +84,7 @@
    #include
    #include
    #include
    +#include
    #include
    #include
    #include
    @@ -650,7 +651,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
    info->closing_wait = 3000;
    info->close_delay = 50;
    init_waitqueue_head(&info->open_wait);
    - init_waitqueue_head(&info->close_wait);
    + init_completion(&info->close_wait);
    info->flags &= ~ROCKET_MODE_MASK;
    switch (pc104[board][line]) {
    case 422:
    @@ -878,7 +879,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
    if (tty_hung_up_p(filp))
    return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
    if (info->flags & ROCKET_CLOSING) {
    - interruptible_sleep_on(&info->close_wait);
    + if (wait_for_completion_interruptible(&info->close_wait))
    + return -ERESTARTSYS;
    return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
    }

    @@ -983,8 +985,10 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
    return -ENOMEM;

    if (info->flags & ROCKET_CLOSING) {
    - interruptible_sleep_on(&info->close_wait);
    + retval = wait_for_completion_interruptible(&info->close_wait);
    free_page(page);
    + if (retval)
    + return retval;
    return ((info->flags & ROCKET_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
    }

    @@ -1176,7 +1180,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
    }
    info->flags &= ~(ROCKET_INITIALIZED | ROCKET_CLOSING | ROCKET_NORMAL_ACTIVE);
    tty->closing = 0;
    - wake_up_interruptible(&info->close_wait);
    + complete_all(&info->close_wait);
    atomic_dec(&rp_num_ports_open);

    #ifdef ROCKET_DEBUG_OPEN
    diff --git a/drivers/char/rocket_int.h b/drivers/char/rocket_int.h
    index b4c53df..148e81c 100644
    --- a/drivers/char/rocket_int.h
    +++ b/drivers/char/rocket_int.h
    @@ -1163,13 +1163,8 @@ struct r_port {
    int read_status_mask;
    int cps;

    -#ifdef DECLARE_WAITQUEUE
    wait_queue_head_t open_wait;
    - wait_queue_head_t close_wait;
    -#else
    - struct wait_queue *open_wait;
    - struct wait_queue *close_wait;
    -#endif
    + struct completion *close_wait;
    spinlock_t slock;
    struct mutex write_mtx;
    };
    -
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  2. Re: [PATCH 1/1] V4L: rocket, switch sleep_on to completion

    On 10/08/2007 02:35 PM, Jiri Slaby wrote:
    > rocket, switch sleep_on to completion


    Blah, wrong patch, ignore it...
    -
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