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...#39;s unregistered. Add a wait for zero in the hwrng_unregister path. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/char/hw_random/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index ee9e504..9f6f5bb 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex); static DEFINE_MUTEX(reading_mutex); static int data_avail; static u8 *rng_buffer, *rng_fillbuf; +static DECLARE_WAIT_QUEUE_HEAD(rng_done); static unsigned short curre...

...#39;s unregistered. Add a wait for zero in the hwrng_unregister path. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/char/hw_random/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index ee9e504..9f6f5bb 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -60,6 +60,7 @@ static DEFINE_MUTEX(rng_mutex); static DEFINE_MUTEX(reading_mutex); static int data_avail; static u8 *rng_buffer, *rng_fillbuf; +static DECLARE_WAIT_QUEUE_HEAD(rng_done); static unsigned short curre...

When I hotunplug a busy virtio-rng device or try to access hwrng attributes in non-smp guest, it gets stuck. My original was pain, Rusty posted a real fix. This patchset fixed two issue in v1, and tested by my 6+ cases. | test 0: | hotunplug rng device from qemu monitor | | test 1: | guest) # dd if=/dev/hwrng of=/dev/null & | hotunplug rng device from qemu monitor | | test 2: |

When I hotunplug a busy virtio-rng device or try to access hwrng attributes in non-smp guest, it gets stuck. My original was pain, Rusty posted a real fix. This patchset fixed two issue in v1, and tested by my 6+ cases. | test 0: | hotunplug rng device from qemu monitor | | test 1: | guest) # dd if=/dev/hwrng of=/dev/null & | hotunplug rng device from qemu monitor | | test 2: |