scsi: iscsi_tcp: set BDI_CAP_STABLE_WRITES when data digest enabled

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[ Upstream commit 89d0c80439 ]

iscsi tcp will first send out data, then calculate and send data
digest. If we don't have BDI_CAP_STABLE_WRITES, the page cache will be
written in spite of the on going writeback. Consequently, wrong digest
will be got and sent to target.

To fix this, set BDI_CAP_STABLE_WRITES when data digest is enabled
in iscsi_tcp .slave_configure callback.

Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Acked-by: Chris Leech <cleech@redhat.com>
Acked-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jianchao Wang 2018-03-07 20:29:03 +08:00 • committed by Greg Kroah-Hartman

parent b1a706fdb5

commit 10859964e0

1 changed files with 8 additions and 0 deletions

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drivers/scsi/iscsi_tcp.c

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