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authorHannes Reinecke <hare@suse.de>2014-11-24 15:37:26 +0100
committerChristoph Hellwig <hch@lst.de>2014-11-24 16:13:15 +0100
commit6df388f2d549d3a2a7ad58b632d2ecd25fc0ff3f (patch)
tree7b663c4ebd1da38079723da2989e7f44388a52f2 /drivers/scsi/esp_scsi.h
parent3a7e7be2a9a2105742c3c88d466ea2158a03a837 (diff)
downloadlinux-6df388f2d549d3a2a7ad58b632d2ecd25fc0ff3f.tar.bz2
am53c974: BLAST residual handling
The am53c974 has an design issue where a single byte might be left in the SCSI FIFO after a DMA transfer. As the handling code is currently untested add a WARN_ON() statement here. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/esp_scsi.h')
-rw-r--r--drivers/scsi/esp_scsi.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h
index 27dcaf84e717..5fa456cc5e8b 100644
--- a/drivers/scsi/esp_scsi.h
+++ b/drivers/scsi/esp_scsi.h
@@ -269,6 +269,7 @@ struct esp_cmd_entry {
#define ESP_CMD_FLAG_WRITE 0x01 /* DMA is a write */
#define ESP_CMD_FLAG_ABORT 0x02 /* being aborted */
#define ESP_CMD_FLAG_AUTOSENSE 0x04 /* Doing automatic REQUEST_SENSE */
+#define ESP_CMD_FLAG_RESIDUAL 0x08 /* AM53c974 BLAST residual */
u8 tag[2];
u8 orig_tag[2];