Hello.
On 12/16/2014 07:49 PM, Suman Tripathi wrote:
This patch addresses the issue with ATA_CMD_PACKET pio mode
command for enumeration and device detection with ATAPI devices.It is the
same issue as in patch
www.spinics.net/lists/linux-ide/msg49092.html
Signed-off-by: Suman Tripathi <[email protected]>
---
drivers/ata/ahci_xgene.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 0ffd3c9..9730907 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -125,10 +125,11 @@ static int xgene_ahci_restart_engine(struct ata_port *ap)
* xgene_ahci_qc_issue - Issue commands to the device
* @qc: Command to issue
*
- * Due to Hardware errata for IDENTIFY DEVICE command, the controller cannot
- * clear the BSY bit after receiving the PIO setup FIS. This results in the dma
- * state machine goes into the CMFatalErrorUpdate state and locks up. By
- * restarting the dma engine, it removes the controller out of lock up state.
+ * Due to Hardware errata for IDENTIFY DEVICE command and COMMAND PACKET
Just PACKET.
+ * command of ATAPI protocol set, the controller cannot clear the BSY bit
+ * after receiving the PIO setup FIS. This results in the dma state machine
DMA.
+ * goes into the CMFatalErrorUpdate state and locks up. By restarting the
s/goes/going/.
+ * dma engine, it removes the controller out of lock up state.
DMA again.
*/
static unsigned int xgene_ahci_qc_issue(struct ata_queued_cmd *qc)
{
[...]
MBR, Sergei
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