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From:   refactormyself@gmail.com
To:     helgaas@kernel.org
Cc:     Bolarinwa Olayemi Saheed <refactormyself@gmail.com>,
        bjorn@helgaas.com, linux-pci@vger.kernel.org,
        skhan@linuxfoundation.org,
        Mike Marciniszyn <mike.marciniszyn@intel.com>,
        Dennis Dalessandro <dennis.dalessandro@intel.com>,
        Doug Ledford <dledford@redhat.com>,
        Jason Gunthorpe <jgg@ziepe.ca>, linux-rdma@vger.kernel.org,
        linux-kernel-mentees@lists.linuxfoundation.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/8] IB/hfi1: Convert PCIBIOS_* errors to generic -E* errors
Date:   Mon, 15 Jun 2020 09:32:20 +0200
Message-Id: <20200615073225.24061-4-refactormyself@gmail.com>
In-Reply-To: <20200615073225.24061-1-refactormyself@gmail.com>
References: <20200615073225.24061-1-refactormyself@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Bolarinwa Olayemi Saheed <refactormyself@gmail.com>

restore_pci_variables() and save_pci_variables() return PCIBIOS_ error
codes from PCIe capability accessors.

PCIBIOS_ error codes have positive values. Passing on these values is
inconsistent with functions which return only a negative value on failure.

Before passing on the return value of PCIe capability accessors, call
pcibios_err_to_errno() to convert any positive PCIBIOS_ error codes to
negative generic error values.

Fix redundant initialisation.

Suggested-by: Bjorn Helgaas <bjorn@helgaas.com>
Signed-off-by: Bolarinwa Olayemi Saheed <refactormyself@gmail.com>
---
 drivers/infiniband/hw/hfi1/pcie.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 1a6268d61977..2a45f34ac6c8 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -334,10 +334,14 @@ int pcie_speeds(struct hfi1_devdata *dd)
 	return 0;
 }
 
-/* restore command and BARs after a reset has wiped them out */
+/**
+ * Restore command and BARs after a reset has wiped them out
+ *
+ * Returns 0 on success, otherwise a negative error value
+ */
 int restore_pci_variables(struct hfi1_devdata *dd)
 {
-	int ret = 0;
+	int ret;
 
 	ret = pci_write_config_word(dd->pcidev, PCI_COMMAND, dd->pci_command);
 	if (ret)
@@ -386,13 +390,17 @@ int restore_pci_variables(struct hfi1_devdata *dd)
 
 error:
 	dd_dev_err(dd, "Unable to write to PCI config\n");
-	return ret;
+	return pcibios_err_to_errno(ret);
 }
 
-/* Save BARs and command to rewrite after device reset */
+/**
+ * Save BARs and command to rewrite after device reset
+ *
+ * Returns 0 on success, otherwise a negative error value
+ */
 int save_pci_variables(struct hfi1_devdata *dd)
 {
-	int ret = 0;
+	int ret;
 
 	ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
 				    &dd->pcibar0);
@@ -441,7 +449,7 @@ int save_pci_variables(struct hfi1_devdata *dd)
 
 error:
 	dd_dev_err(dd, "Unable to read from PCI config\n");
-	return ret;
+	return pcibios_err_to_errno(ret);
 }
 
 /*
-- 
2.18.2