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Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"

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Fix didn't work for all cases, reverting to add a (hopefully)
better fix.

This reverts commit f151ba989d.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2018-09-28 09:40:17 -06:00
parent 587562d0c7
commit 15c2068876
1 changed files with 3 additions and 1 deletions
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4
drivers/block/xen-blkfront.c
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@ -2667,9 +2667,11 @@ static void purge_persistent_grants(struct blkfront_info *info)
gnttab_query_foreign_access(gnt_list_entry->gref)) gnttab_query_foreign_access(gnt_list_entry->gref))
continue; continue;
list_del(&gnt_list_entry->node);
gnttab_end_foreign_access(gnt_list_entry->gref, 0, 0UL); gnttab_end_foreign_access(gnt_list_entry->gref, 0, 0UL);
gnt_list_entry->gref = GRANT_INVALID_REF;
rinfo->persistent_gnts_c--; rinfo->persistent_gnts_c--;
__free_page(gnt_list_entry->page);
kfree(gnt_list_entry);
} }
spin_unlock_irqrestore(&rinfo->ring_lock, flags); spin_unlock_irqrestore(&rinfo->ring_lock, flags);