block: don't merge bios with different app_tags #457
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nvme_set_app_tag() uses the app_tag value from the bio_integrity_payload
of the struct request's first bio. This assumes all the request's bios
have the same app_tag. However, it is possible for bios with different
app_tag values to be merged into a single request.
Add a check in blk_integrity_merge_{bio,rq}() to prevent the merging of
bios/requests with different app_tag values if BIP_CHECK_APPTAG is set.
Signed-off-by: Caleb Sander Mateos <[email protected]>
Fixes: 3d8b5a2 ("block: add support to pass user meta buffer")
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Pull request for series with
subject: block: don't merge bios with different app_tags
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1039130