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-rw-r--r--sys/dev/ata/ata-lowlevel.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/dev/ata/ata-lowlevel.c b/sys/dev/ata/ata-lowlevel.c
index 6dd7662..c46caa6 100644
--- a/sys/dev/ata/ata-lowlevel.c
+++ b/sys/dev/ata/ata-lowlevel.c
@@ -213,7 +213,9 @@ ata_begin_transaction(struct ata_request *request)
printf("ata_begin_transaction OOPS!!!\n");
begin_finished:
- ch->dma.unload(request);
+ if (ch->dma.unload) {
+ ch->dma.unload(request);
+ }
return ATA_OP_FINISHED;
begin_continue:
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