linux-kernel - [PATCH AUTOSEL 4.14 09/14] scsi: ipr: Fix missing/incorrect resource cleanup in error case

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Message-Id: <20220614021019.1100929-9-sashal@kernel.org>
Date:   Mon, 13 Jun 2022 22:10:14 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chengguang Xu <cgxu519@...ernel.net>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Brian King <brking@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>, jejb@...ux.vnet.ibm.com,
        linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 09/14] scsi: ipr: Fix missing/incorrect resource cleanup in error case

From: Chengguang Xu <cgxu519@...ernel.net>

[ Upstream commit d64c491911322af1dcada98e5b9ee0d87e8c8fee ]

Fix missing resource cleanup (when '(--i) == 0') for error case in
ipr_alloc_mem() and skip incorrect resource cleanup (when '(--i) == 0') for
error case in ipr_request_other_msi_irqs() because variable i started from
1.

Link: https://lore.kernel.org/r/20220529153456.4183738-4-cgxu519@mykernel.net
Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Brian King <brking@...ux.vnet.ibm.com>
Signed-off-by: Chengguang Xu <cgxu519@...ernel.net>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/ipr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index b172f0a02083..99b37e19feca 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9788,7 +9788,7 @@ static int ipr_alloc_mem(struct ipr_ioa_cfg *ioa_cfg)
 					GFP_KERNEL);
 
 		if (!ioa_cfg->hrrq[i].host_rrq)  {
-			while (--i > 0)
+			while (--i >= 0)
 				dma_free_coherent(&pdev->dev,
 					sizeof(u32) * ioa_cfg->hrrq[i].size,
 					ioa_cfg->hrrq[i].host_rrq,
@@ -10060,7 +10060,7 @@ static int ipr_request_other_msi_irqs(struct ipr_ioa_cfg *ioa_cfg,
 			ioa_cfg->vectors_info[i].desc,
 			&ioa_cfg->hrrq[i]);
 		if (rc) {
-			while (--i >= 0)
+			while (--i > 0)
 				free_irq(pci_irq_vector(pdev, i),
 					&ioa_cfg->hrrq[i]);
 			return rc;
-- 
2.35.1