linux-kernel - [PATCH 4.4 31/73] megaraid: fix null pointer check in megasas_detach

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Date:   Wed, 28 Sep 2016 11:05:01 +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, Maurizio Lombardi <mlombard@...hat.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Tomas Henzl <thenzl@...hat.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.4 31/73] megaraid: fix null pointer check in megasas_detach_one().

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

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

From: Maurizio Lombardi <mlombard@...hat.com>

commit 546e559c79b1a8d27c23262907a00fc209e392a0 upstream.

The pd_seq_sync pointer can't be NULL, we have to check its entries
instead.

Signed-off-by: Maurizio Lombardi <mlombard@...hat.com>
Acked-by: Sumit Saxena <sumit.saxena@...adcom.com>
Reviewed-by: Tomas Henzl <thenzl@...hat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/megaraid/megaraid_sas_base.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5941,11 +5941,11 @@ static void megasas_detach_one(struct pc
 			if (fusion->ld_drv_map[i])
 				free_pages((ulong)fusion->ld_drv_map[i],
 					fusion->drv_map_pages);
-				if (fusion->pd_seq_sync)
-					dma_free_coherent(&instance->pdev->dev,
-						pd_seq_map_sz,
-						fusion->pd_seq_sync[i],
-						fusion->pd_seq_phys[i]);
+			if (fusion->pd_seq_sync[i])
+				dma_free_coherent(&instance->pdev->dev,
+					pd_seq_map_sz,
+					fusion->pd_seq_sync[i],
+					fusion->pd_seq_phys[i]);
 		}
 		free_pages((ulong)instance->ctrl_context,
 			instance->ctrl_context_pages);