diff options
| author | Stephan Mueller <smueller@chronox.de> | 2016-05-02 02:14:34 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-20 18:09:20 +0200 |
| commit | f48dd2d0a75c6facd044c36fe86251027c12f0eb (patch) | |
| tree | 04ccca45ee77fd70f29fec4b51d0d66aafff8084 | |
| parent | 529025b1293b2af844348d700cf22fa585c1f2b6 (diff) | |
random: add interrupt callback to VMBus IRQ handler
commit 4b44f2d18a330565227a7348844493c59366171e upstream.
The Hyper-V Linux Integration Services use the VMBus implementation for
communication with the Hypervisor. VMBus registers its own interrupt
handler that completely bypasses the common Linux interrupt handling.
This implies that the interrupt entropy collector is not triggered.
This patch adds the interrupt entropy collection callback into the VMBus
interrupt handler function.
Signed-off-by: Stephan Mueller <stephan.mueller@atsec.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/random.c | 1 | ||||
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index e5e1f1432e4d..491a4dce13fe 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -948,6 +948,7 @@ void add_interrupt_randomness(int irq, int irq_flags) /* award one bit for the contents of the fast pool */ credit_entropy_bits(r, credit + 1); } +EXPORT_SYMBOL_GPL(add_interrupt_randomness); #ifdef CONFIG_BLOCK void add_disk_randomness(struct gendisk *disk) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index f19b6f7a467a..9b5440f6b3b4 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -41,6 +41,7 @@ #include <linux/ptrace.h> #include <linux/screen_info.h> #include <linux/kdebug.h> +#include <linux/random.h> #include "hyperv_vmbus.h" static struct acpi_device *hv_acpi_dev; @@ -826,6 +827,8 @@ static void vmbus_isr(void) else tasklet_schedule(&msg_dpc); } + + add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0); } |