[patch libata-dev-2.6 3/5] libata: filter SET_FEATURES - XFER MODE from ATA pass thru
From: John W. Linville <hidden>
Date: 2005-02-18 20:04:05
Also in:
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Filter-out attempts to issue a SET_FEATURES - XFER MODE command via the ATA pass thru mechanism. Signed-off-by: John W. Linville <redacted> --- 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
linville@tuxdriver.com