linux-kernel - [PATCH 5.6 148/167] fpga: dfl: pci: fix return value of cci_pci_sriov

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Date:   Tue, 28 Apr 2020 20:25:24 +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, Xu Yilun <yilun.xu@...el.com>,
        Wu Hao <hao.wu@...el.com>, Moritz Fischer <mdf@...nel.org>
Subject: [PATCH 5.6 148/167] fpga: dfl: pci: fix return value of cci_pci_sriov_configure

From: Xu Yilun <yilun.xu@...el.com>

commit 3c2760b78f90db874401d97e3c17829e2e36f400 upstream.

pci_driver.sriov_configure should return negative value on error and
number of enabled VFs on success. But now the driver returns 0 on
success. The sriov configure still works but will cause a warning
message:

  XX VFs requested; only 0 enabled

This patch changes the return value accordingly.

Cc: stable@...r.kernel.org
Signed-off-by: Xu Yilun <yilun.xu@...el.com>
Signed-off-by: Wu Hao <hao.wu@...el.com>
Signed-off-by: Moritz Fischer <mdf@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/fpga/dfl-pci.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/fpga/dfl-pci.c
+++ b/drivers/fpga/dfl-pci.c
@@ -248,11 +248,13 @@ static int cci_pci_sriov_configure(struc
 			return ret;
 
 		ret = pci_enable_sriov(pcidev, num_vfs);
-		if (ret)
+		if (ret) {
 			dfl_fpga_cdev_config_ports_pf(cdev);
+			return ret;
+		}
 	}
 
-	return ret;
+	return num_vfs;
 }
 
 static void cci_pci_remove(struct pci_dev *pcidev)