[SCSI] ipr: Reduce default error log size

Since the default error log size has increased on SAS adapters,
prevent ipr from logging this additional data unless requested
to do so by the user set log level in order to prevent flooding
the logs.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ipr.c

@@ -1249,19 +1249,23 @@ static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
 
 /**
  * ipr_log_hex_data - Log additional hex IOA error data.
+ * @ioa_cfg:	ioa config struct
  * @data:		IOA error data
  * @len:		data length
  *
  * Return value:
  * 	none
  **/
-static void ipr_log_hex_data(u32 *data, int len)
+static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, u32 *data, int len)
 {
 	int i;
 
 	if (len == 0)
 		return;
 
+	if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
+		len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
+
 	for (i = 0; i < len / 4; i += 4) {
 		ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
 			be32_to_cpu(data[i]),
@@ -1290,7 +1294,7 @@ static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
 	ipr_err("%s\n", error->failure_reason);
 	ipr_err("Remote Adapter VPD:\n");
 	ipr_log_ext_vpd(&error->vpd);
-	ipr_log_hex_data(error->data,
+	ipr_log_hex_data(ioa_cfg, error->data,
 			 be32_to_cpu(hostrcb->hcam.length) -
 			 (offsetof(struct ipr_hostrcb_error, u) +
 			  offsetof(struct ipr_hostrcb_type_17_error, data)));
@@ -1315,7 +1319,7 @@ static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
 	ipr_err("%s\n", error->failure_reason);
 	ipr_err("Remote Adapter VPD:\n");
 	ipr_log_vpd(&error->vpd);
-	ipr_log_hex_data(error->data,
+	ipr_log_hex_data(ioa_cfg, error->data,
 			 be32_to_cpu(hostrcb->hcam.length) -
 			 (offsetof(struct ipr_hostrcb_error, u) +
 			  offsetof(struct ipr_hostrcb_type_07_error, data)));
@@ -1531,7 +1535,7 @@ static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
 			((unsigned long)fabric + be16_to_cpu(fabric->length));
 	}
 
-	ipr_log_hex_data((u32 *)fabric, add_len);
+	ipr_log_hex_data(ioa_cfg, (u32 *)fabric, add_len);
 }
 
 /**
@@ -1545,7 +1549,7 @@ static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
 				  struct ipr_hostrcb *hostrcb)
 {
-	ipr_log_hex_data(hostrcb->hcam.u.raw.data,
+	ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
 			 be32_to_cpu(hostrcb->hcam.length));
 }
 

drivers/scsi/ipr.h

@@ -104,6 +104,7 @@
 #define IPR_IOASC_IOA_WAS_RESET			0x10000001
 #define IPR_IOASC_PCI_ACCESS_ERROR			0x10000002
 
+#define IPR_DEFAULT_MAX_ERROR_DUMP			984
 #define IPR_NUM_LOG_HCAMS				2
 #define IPR_NUM_CFG_CHG_HCAMS				2
 #define IPR_NUM_HCAMS	(IPR_NUM_LOG_HCAMS + IPR_NUM_CFG_CHG_HCAMS)