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mm: clear AS_EIO/AS_ENOSPC when writeback initiation fails 

filemap_write_and_wait{_range} will return an error if writeback
initiation fails, but won't clear errors in the address_space. This is
particularly problematic on DAX, as filemap_fdatawrite* is
effectively synchronous there. Ensure that we clear the AS_EIO/AS_ENOSPC
flags when filemap_fdatawrite* returns an error.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
hifive-unleashed-5.1
Jeff Layton 2017-07-06 07:02:23 -04:00
parent 76341cabbd
commit cbeaf9510a
1 changed files with 6 additions and 0 deletions
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6
mm/filemap.c
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@ -515,6 +515,9 @@ int filemap_write_and_wait(struct address_space *mapping)
int err2 = filemap_fdatawait(mapping);
if (!err)
err = err2;
} else {
/* Clear any previously stored errors */
filemap_check_errors(mapping);
}
} else {
err = filemap_check_errors(mapping);
@ -549,6 +552,9 @@ int filemap_write_and_wait_range(struct address_space *mapping,
lstart, lend);
if (!err)
err = err2;
} else {
/* Clear any previously stored errors */
filemap_check_errors(mapping);
}
} else {
err = filemap_check_errors(mapping);