pds_core: check health in devcmd wait

Similar to what we do in the AdminQ, check for devcmd health
while waiting for an answer.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/pds_core/dev.c

@@ -42,6 +42,8 @@ int pdsc_err_to_errno(enum pds_core_status_code code)
 		return -ERANGE;
 	case PDS_RC_BAD_ADDR:
 		return -EFAULT;
+	case PDS_RC_BAD_PCI:
+		return -ENXIO;
 	case PDS_RC_EOPCODE:
 	case PDS_RC_EINTR:
 	case PDS_RC_DEV_CMD:
@@ -62,7 +64,7 @@ bool pdsc_is_fw_running(struct pdsc *pdsc)
 	/* Firmware is useful only if the running bit is set and
 	 * fw_status != 0xff (bad PCI read)
 	 */
-	return (pdsc->fw_status != 0xff) &&
+	return (pdsc->fw_status != PDS_RC_BAD_PCI) &&
 		(pdsc->fw_status & PDS_CORE_FW_STS_F_RUNNING);
 }
 
@@ -128,6 +130,7 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 	unsigned long max_wait;
 	unsigned long duration;
 	int timeout = 0;
+	bool running;
 	int done = 0;
 	int err = 0;
 	int status;
@@ -136,6 +139,10 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 	max_wait = start_time + (max_seconds * HZ);
 
 	while (!done && !timeout) {
+		running = pdsc_is_fw_running(pdsc);
+		if (!running)
+			break;
+
 		done = pdsc_devcmd_done(pdsc);
 		if (done)
 			break;
@@ -152,7 +159,7 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 		dev_dbg(dev, "DEVCMD %d %s after %ld secs\n",
 			opcode, pdsc_devcmd_str(opcode), duration / HZ);
 
-	if (!done || timeout) {
+	if ((!done || timeout) && running) {
 		dev_err(dev, "DEVCMD %d %s timeout, done %d timeout %d max_seconds=%d\n",
 			opcode, pdsc_devcmd_str(opcode), done, timeout,
 			max_seconds);

include/linux/pds/pds_core_if.h

@@ -79,6 +79,7 @@ enum pds_core_status_code {
 	PDS_RC_EVFID	= 31,	/* VF ID does not exist */
 	PDS_RC_BAD_FW	= 32,	/* FW file is invalid or corrupted */
 	PDS_RC_ECLIENT	= 33,   /* No such client id */
+	PDS_RC_BAD_PCI	= 255,  /* Broken PCI when reading status */
 };
 
 /**