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From:   Naveen Naidu <naveennaidu479@gmail.com>
To:     bhelgaas@google.com, ruscur@russell.cc, oohall@gmail.com
Cc:     Naveen Naidu <naveennaidu479@gmail.com>,
        linux-kernel-mentees@lists.linuxfoundation.org,
        skhan@linuxfoundation.org, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v4 3/8] PCI/DPC: Initialize info->id in dpc_process_error()
Date:   Tue,  5 Oct 2021 22:48:10 +0530
Message-Id: <5ebe87f18339d7567c1d91203e7c5d31f4e65c52.1633453452.git.naveennaidu479@gmail.com>
In-Reply-To: <cover.1633453452.git.naveennaidu479@gmail.com>
References: <cover.1633453452.git.naveennaidu479@gmail.com>
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In the dpc_process_error() path, info->id isn't initialized before being
passed to aer_print_error(). In the corresponding AER path, it is
initialized in aer_isr_one_error().

The error message shown during Coverity Scan is:

  Coverity #1461602
  CID 1461602 (#1 of 1): Uninitialized scalar variable (UNINIT)
  8. uninit_use_in_call: Using uninitialized value info.id when calling aer_print_error.

Initialize the "info->id" before passing it to aer_print_error()

Fixes: 8aefa9b0d910 ("PCI/DPC: Print AER status in DPC event handling")
Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com>
---
 drivers/pci/pcie/dpc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index c556e7beafe3..df3f3a10f8bc 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -262,14 +262,14 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
 
 void dpc_process_error(struct pci_dev *pdev)
 {
-	u16 cap = pdev->dpc_cap, status, source, reason, ext_reason;
+	u16 cap = pdev->dpc_cap, status, reason, ext_reason;
 	struct aer_err_info info;
 
 	pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
-	pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source);
+	pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &info.id);
 
 	pci_info(pdev, "containment event, status:%#06x source:%#06x\n",
-		 status, source);
+		 status, info.id);
 
 	reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN) >> 1;
 	ext_reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN_EXT) >> 5;
-- 
2.25.1