[PATCH Utopic SRU] ipr: don't log error messages when applications issues illegal requests

[tim.gardner at canonical.com]

From: "wenxiong at linux.vnet.ibm.com" <wenxiong at linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1392152

Failing Device information are logged when IOA firmware detected these
illegal request such as IOA firmware doesn't support inquiry with page
code 2. The patch fixes the issue.

Signed-off-by: Brian King <brking at linux.vnet.ibm.com>
Tested-by: Wen Xiong <wenxiong at linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch at lst.de>
(cherry picked from commit 3185ea63907cb281cfdc5aa29aa2d855826ad16a)
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
---
 drivers/scsi/ipr.c | 10 ++++++++++
 drivers/scsi/ipr.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 924b0ba..2a9578c 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2440,6 +2440,7 @@ static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
 {
 	u32 ioasc;
 	int error_index;
+	struct ipr_hostrcb_type_21_error *error;
 
 	if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
 		return;
@@ -2464,6 +2465,15 @@ static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
 	if (!ipr_error_table[error_index].log_hcam)
 		return;
 
+	if (ioasc == IPR_IOASC_HW_CMD_FAILED &&
+	    hostrcb->hcam.overlay_id == IPR_HOST_RCB_OVERLAY_ID_21) {
+		error = &hostrcb->hcam.u.error64.u.type_21_error;
+
+		if (((be32_to_cpu(error->sense_data[0]) & 0x0000ff00) >> 8) == ILLEGAL_REQUEST &&
+			ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
+				return;
+	}
+
 	ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
 
 	/* Set indication we have logged an error */
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 31ed126..8f8960d0 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -130,6 +130,7 @@
 #define IPR_IOASC_HW_DEV_BUS_STATUS			0x04448500
 #define	IPR_IOASC_IOASC_MASK			0xFFFFFF00
 #define	IPR_IOASC_SCSI_STATUS_MASK		0x000000FF
+#define IPR_IOASC_HW_CMD_FAILEd			0x046E0000
 #define IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT	0x05240000
 #define IPR_IOASC_IR_RESOURCE_HANDLE		0x05250000
 #define IPR_IOASC_IR_NO_CMDS_TO_2ND_IOA		0x05258100
-- 
2.1.3