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-rw-r--r--drivers/ata/libata-sff.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 0eae9b45355..5a4aad123c4 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1013,9 +1013,12 @@ next_sg:
qc->cursg_ofs = 0;
}
- /* consumed can be larger than count only for the last transfer */
- WARN_ON_ONCE(qc->cursg && count != consumed);
-
+ /*
+ * There used to be a WARN_ON_ONCE(qc->cursg && count != consumed);
+ * Unfortunately __atapi_pio_bytes doesn't know enough to do the WARN
+ * check correctly as it doesn't know if it is the last request being
+ * made. Somebody should implement a proper sanity check.
+ */
if (bytes)
goto next_sg;
return 0;