KVM: s390: Fix get_all_floating_irqs()

When attempting to report all pending floating interrupt to userspace,
the GISA IPM bits are atomically tested and cleared, and the
corresponding interrupt description is written in the output buffer. If
the output buffer is too small, an error is returned to userspace, but
the GISA IPM bits are now lost.

Moreover, the contract of KVM_DEV_FLIC_GET_ALL_IRQS, which is the only
path to get_all_floating_irqs(), states that:

> All interrupts remain pending, i.e. are not deleted from the list of
> currently pending interrupts.

Fix by non-destructively testing for the GISA IPM bits.

Fixes: 24160af6cb28 ("KVM: s390: add GISA interrupts to FLIC ioctl interface")
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260812104436.109741-4-imbrenda@linux.ibm.com>

0 files changed, 0 insertions, 0 deletions