Filter-out attempts to issue a SET_FEATURES - XFER MODE command
via the ATA pass thru mechanism.
Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
---
drivers/scsi/libata-scsi.c | 11 +++++++++++
1 files changed, 11 insertions(+)
--- sata-smart-2.6/drivers/scsi/libata-scsi.c.filter 2005-02-17
16:49:51.362715273 -0500
+++ sata-smart-2.6/drivers/scsi/libata-scsi.c 2005-02-17 16:50:03.907040725
-0500
@@ -1764,6 +1764,17 @@ ata_scsi_pass_thru(struct ata_queued_cmd
}
/*
+ * Filter SET_FEATURES - XFER MODE command -- otherwise,
+ * SET_FEATURES - XFER MODE must be preceded/succeeded
+ * by an update to hardware-specific registers for each
+ * controller (i.e. the reason for ->set_piomode(),
+ * ->set_dmamode(), and ->post_set_mode() hooks).
+ */
+ if ((tf->command == ATA_CMD_SET_FEATURES)
+ && (tf->feature == SETFEATURES_XFER))
+ return 1;
+
+ /*
* Set flags so that all registers will be written,
* and pass on write indication (used for PIO/DMA
* setup.)
--
John W. Linville
[EMAIL PROTECTED]
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