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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2017-06-10 14:10:00 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-06-28 07:32:09 +0200 |
| commit | 725708349172f00b86e2bac5c03de360b79aaf65 (patch) | |
| tree | bd2186c9804f0ee65849bc155a5ed8e1f44d5f90 /arch/s390/pci/pci_insn.c | |
| parent | 4dfbd3efe3f0cf9ff1325b87491e1b1fe07afaf1 (diff) | |
| download | linux-stable-725708349172f00b86e2bac5c03de360b79aaf65.tar.gz linux-stable-725708349172f00b86e2bac5c03de360b79aaf65.tar.bz2 linux-stable-725708349172f00b86e2bac5c03de360b79aaf65.zip | |
s390/pci: improve unreg_ioat error handling
DMA tables are freed in zpci_dma_exit_device regardless of the return
code of zpci_unregister_ioat. This could lead to a use after free. On
the other hand during function hot-unplug, zpci_unregister_ioat will
always fail since the function is already gone.
So let zpci_unregister_ioat report success when the function is gone
but don't cleanup the dma table when a function could still have it
in access.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci_insn.c')
0 files changed, 0 insertions, 0 deletions