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    Subject[PATCH 4.4 32/51] hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Dave Gerlach <d-gerlach@ti.com>

    commit ad8529fde9e3601180a839867a8ab041109aebb5 upstream.

    Currently omap-rng checks the return value of pm_runtime_get_sync and
    reports failure if anything is returned, however it should be checking
    if ret < 0 as pm_runtime_get_sync return 0 on success but also can return
    1 if the device was already active which is not a failure case. Only
    values < 0 are actual failures.

    Fixes: 61dc0a446e5d ("hwrng: omap - Fix assumption that runtime_get_sync will always succeed")
    Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/char/hw_random/omap-rng.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/drivers/char/hw_random/omap-rng.c
    +++ b/drivers/char/hw_random/omap-rng.c
    @@ -385,7 +385,7 @@ static int omap_rng_probe(struct platfor

    pm_runtime_enable(&pdev->dev);
    ret = pm_runtime_get_sync(&pdev->dev);
    - if (ret) {
    + if (ret < 0) {
    dev_err(&pdev->dev, "Failed to runtime_get device: %d\n", ret);
    pm_runtime_put_noidle(&pdev->dev);
    goto err_ioremap;
    @@ -443,7 +443,7 @@ static int __maybe_unused omap_rng_resum
    int ret;

    ret = pm_runtime_get_sync(dev);
    - if (ret) {
    + if (ret < 0) {
    dev_err(dev, "Failed to runtime_get device: %d\n", ret);
    pm_runtime_put_noidle(dev);
    return ret;

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