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authorStephan Mueller <smueller@chronox.de>2016-05-02 02:14:34 -0400
committerTheodore Ts'o <tytso@mit.edu>2016-06-13 11:54:33 -0400
commit4b44f2d18a330565227a7348844493c59366171e (patch)
tree5a995230ac3e2e56bc3042385a2f585c31e9389d /drivers/hv
parent9b4d008787f864f17d008c9c15bbe8a0f7e2fc24 (diff)
downloadlinux-4b44f2d18a330565227a7348844493c59366171e.tar.bz2
random: add interrupt callback to VMBus IRQ handler
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. Cc: stable@kernel.org 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>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/vmbus_drv.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 952f20fdc7e3..e82f7e1c217c 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -42,6 +42,7 @@
#include <linux/screen_info.h>
#include <linux/kdebug.h>
#include <linux/efi.h>
+#include <linux/random.h>
#include "hyperv_vmbus.h"
static struct acpi_device *hv_acpi_dev;
@@ -806,6 +807,8 @@ static void vmbus_isr(void)
else
tasklet_schedule(hv_context.msg_dpc[cpu]);
}
+
+ add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0);
}