s390/vfio-ap: Fix stale do_remove flag across iterations in vfio_ap_mdev_cfg_remove

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The do_remove flag in vfio_ap_mdev_cfg_remove() is initialised to zero
before the loop that iterates over the list of matrix mdevs, but is
never reset at the start of each iteration. Since do_remove is
OR-accumulated across iterations, a positive result from one mdev
carries over to subsequent mdevs.

The fix is to set the do_remove flag with the first call to bitmap_and;
for example: do_remove = bitmap_an rather than do_remove |= bitmap_and.

Fixes: eeb386aeb5 ("s390/vfio-ap: handle config changed and scan complete notification")
Cc: stable@vger.kernel.org
Signed-off-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>

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Anthony Krowiak 2026-08-12 16:02:32 -04:00 • committed by Christian Borntraeger

parent 188a15cc7f

commit b1f092d94f

1 changed files with 4 additions and 4 deletions

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drivers/s390/crypto/vfio_ap_ops.c

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