linux-kernel - [PATCH 4.18 009/168] scsi: csiostor: fix incorrect port capabilities

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Date:   Mon,  8 Oct 2018 20:29:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Varun Prakash <varun@...lsio.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 009/168] scsi: csiostor: fix incorrect port capabilities

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Varun Prakash <varun@...lsio.com>

[ Upstream commit 68bdc630721c40e908d22cffe07b5ca225a69f6e ]

 - use be32_to_cpu() instead of ntohs() for 32 bit port capabilities.

 - add a new function fwcaps32_to_caps16() to convert 32 bit port
   capabilities to 16 bit port capabilities.

Signed-off-by: Varun Prakash <varun@...lsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/csiostor/csio_hw.c |   55 ++++++++++++++++++++++++++++++++--------
 drivers/scsi/csiostor/csio_hw.h |    1 
 drivers/scsi/csiostor/csio_mb.c |    6 ++--
 3 files changed, 48 insertions(+), 14 deletions(-)

--- a/drivers/scsi/csiostor/csio_hw.c
+++ b/drivers/scsi/csiostor/csio_hw.c
@@ -1513,6 +1513,46 @@ fw_port_cap32_t fwcaps16_to_caps32(fw_po
 }
 
 /**
+ *	fwcaps32_to_caps16 - convert 32-bit Port Capabilities to 16-bits
+ *	@caps32: a 32-bit Port Capabilities value
+ *
+ *	Returns the equivalent 16-bit Port Capabilities value.  Note that
+ *	not all 32-bit Port Capabilities can be represented in the 16-bit
+ *	Port Capabilities and some fields/values may not make it.
+ */
+fw_port_cap16_t fwcaps32_to_caps16(fw_port_cap32_t caps32)
+{
+	fw_port_cap16_t caps16 = 0;
+
+	#define CAP32_TO_CAP16(__cap) \
+		do { \
+			if (caps32 & FW_PORT_CAP32_##__cap) \
+				caps16 |= FW_PORT_CAP_##__cap; \
+		} while (0)
+
+	CAP32_TO_CAP16(SPEED_100M);
+	CAP32_TO_CAP16(SPEED_1G);
+	CAP32_TO_CAP16(SPEED_10G);
+	CAP32_TO_CAP16(SPEED_25G);
+	CAP32_TO_CAP16(SPEED_40G);
+	CAP32_TO_CAP16(SPEED_100G);
+	CAP32_TO_CAP16(FC_RX);
+	CAP32_TO_CAP16(FC_TX);
+	CAP32_TO_CAP16(802_3_PAUSE);
+	CAP32_TO_CAP16(802_3_ASM_DIR);
+	CAP32_TO_CAP16(ANEG);
+	CAP32_TO_CAP16(FORCE_PAUSE);
+	CAP32_TO_CAP16(MDIAUTO);
+	CAP32_TO_CAP16(MDISTRAIGHT);
+	CAP32_TO_CAP16(FEC_RS);
+	CAP32_TO_CAP16(FEC_BASER_RS);
+
+	#undef CAP32_TO_CAP16
+
+	return caps16;
+}
+
+/**
  *      lstatus_to_fwcap - translate old lstatus to 32-bit Port Capabilities
  *      @lstatus: old FW_PORT_ACTION_GET_PORT_INFO lstatus value
  *
@@ -1670,7 +1710,7 @@ csio_enable_ports(struct csio_hw *hw)
 			val = 1;
 
 			csio_mb_params(hw, mbp, CSIO_MB_DEFAULT_TMO,
-				       hw->pfn, 0, 1, &param, &val, false,
+				       hw->pfn, 0, 1, &param, &val, true,
 				       NULL);
 
 			if (csio_mb_issue(hw, mbp)) {
@@ -1680,16 +1720,9 @@ csio_enable_ports(struct csio_hw *hw)
 				return -EINVAL;
 			}
 
-			csio_mb_process_read_params_rsp(hw, mbp, &retval, 1,
-							&val);
-			if (retval != FW_SUCCESS) {
-				csio_err(hw, "FW_PARAMS_CMD(r) port:%d failed: 0x%x\n",
-					 portid, retval);
-				mempool_free(mbp, hw->mb_mempool);
-				return -EINVAL;
-			}
-
-			fw_caps = val;
+			csio_mb_process_read_params_rsp(hw, mbp, &retval,
+							0, NULL);
+			fw_caps = retval ? FW_CAPS16 : FW_CAPS32;
 		}
 
 		/* Read PORT information */
--- a/drivers/scsi/csiostor/csio_hw.h
+++ b/drivers/scsi/csiostor/csio_hw.h
@@ -639,6 +639,7 @@ int csio_handle_intr_status(struct csio_
 
 fw_port_cap32_t fwcap_to_fwspeed(fw_port_cap32_t acaps);
 fw_port_cap32_t fwcaps16_to_caps32(fw_port_cap16_t caps16);
+fw_port_cap16_t fwcaps32_to_caps16(fw_port_cap32_t caps32);
 fw_port_cap32_t lstatus_to_fwcap(u32 lstatus);
 
 int csio_hw_start(struct csio_hw *);
--- a/drivers/scsi/csiostor/csio_mb.c
+++ b/drivers/scsi/csiostor/csio_mb.c
@@ -368,7 +368,7 @@ csio_mb_port(struct csio_hw *hw, struct
 			FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
 
 	if (fw_caps == FW_CAPS16)
-		cmdp->u.l1cfg.rcap = cpu_to_be32(fc);
+		cmdp->u.l1cfg.rcap = cpu_to_be32(fwcaps32_to_caps16(fc));
 	else
 		cmdp->u.l1cfg32.rcap32 = cpu_to_be32(fc);
 }
@@ -395,8 +395,8 @@ csio_mb_process_read_port_rsp(struct csi
 			*pcaps = fwcaps16_to_caps32(ntohs(rsp->u.info.pcap));
 			*acaps = fwcaps16_to_caps32(ntohs(rsp->u.info.acap));
 		} else {
-			*pcaps = ntohs(rsp->u.info32.pcaps32);
-			*acaps = ntohs(rsp->u.info32.acaps32);
+			*pcaps = be32_to_cpu(rsp->u.info32.pcaps32);
+			*acaps = be32_to_cpu(rsp->u.info32.acaps32);
 		}
 	}
 }