linux-kernel - [PATCH 3.18 29/45] scsi: qla2xxx: dont disable a not previously enabled PCI device

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Message-Id: <20170612152554.972190565@linuxfoundation.org>
Date:   Mon, 12 Jun 2017 17:26:39 +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, Johannes Thumshirn <jthumshirn@...e.de>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Giridhar Malavali <giridhar.malavali@...ium.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 3.18 29/45] scsi: qla2xxx: dont disable a not previously enabled PCI device

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

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

From: Johannes Thumshirn <jthumshirn@...e.de>

commit ddff7ed45edce4a4c92949d3c61cd25d229c4a14 upstream.

When pci_enable_device() or pci_enable_device_mem() fail in
qla2x00_probe_one() we bail out but do a call to
pci_disable_device(). This causes the dev_WARN_ON() in
pci_disable_device() to trigger, as the device wasn't enabled
previously.

So instead of taking the 'probe_out' error path we can directly return
*iff* one of the pci_enable_device() calls fails.

Additionally rename the 'probe_out' goto label's name to the more
descriptive 'disable_device'.

Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>
Fixes: e315cd28b9ef ("[SCSI] qla2xxx: Code changes for qla data structure refactoring")
Reviewed-by: Bart Van Assche <bart.vanassche@...disk.com>
Reviewed-by: Giridhar Malavali <giridhar.malavali@...ium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_os.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2387,10 +2387,10 @@ qla2x00_probe_one(struct pci_dev *pdev,

 	if (mem_only) {
 		if (pci_enable_device_mem(pdev))
-			goto probe_out;
+			return ret;
 	} else {
 		if (pci_enable_device(pdev))
-			goto probe_out;
+			return ret;
 	}

 	/* This may fail but that's ok */
@@ -2400,7 +2400,7 @@ qla2x00_probe_one(struct pci_dev *pdev,
 	if (!ha) {
 		ql_log_pci(ql_log_fatal, pdev, 0x0009,
 		    "Unable to allocate memory for ha.\n");
-		goto probe_out;
+		goto disable_device;
 	}
 	ql_dbg_pci(ql_dbg_init, pdev, 0x000a,
 	    "Memory allocated for ha=%p.\n", ha);
@@ -2998,7 +2998,7 @@ iospace_config_failed:
 	kfree(ha);
 	ha = NULL;

-probe_out:
+disable_device:
 	pci_disable_device(pdev);
 	return ret;
 }