Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Alan Mikhak <alan.mikhak@sifive.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.2 053/215] PCI: endpoint: Allocate enough space for fixed size BAR
Date:   Mon, 29 Jul 2019 21:20:49 +0200
Message-Id: <20190729190749.712274386@linuxfoundation.org>
In-Reply-To: <20190729190739.971253303@linuxfoundation.org>
References: <20190729190739.971253303@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

[ Upstream commit f16fb16ed16c7f561e9c41c9ae4107c7f6aa553c ]

PCI endpoint test function code should honor the .bar_fixed_size parameter
from underlying endpoint controller drivers or results may be unexpected.

In pci_epf_test_alloc_space(), check if BAR being used for test
register space is a fixed size BAR. If so, allocate the required fixed
size.

Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/pci/endpoint/functions/pci-epf-test.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 27806987e93b..7d41e6684b87 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -434,10 +434,16 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 	int bar;
 	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
 	const struct pci_epc_features *epc_features;
+	size_t test_reg_size;
 
 	epc_features = epf_test->epc_features;
 
-	base = pci_epf_alloc_space(epf, sizeof(struct pci_epf_test_reg),
+	if (epc_features->bar_fixed_size[test_reg_bar])
+		test_reg_size = bar_size[test_reg_bar];
+	else
+		test_reg_size = sizeof(struct pci_epf_test_reg);
+
+	base = pci_epf_alloc_space(epf, test_reg_size,
 				   test_reg_bar, epc_features->align);
 	if (!base) {
 		dev_err(dev, "Failed to allocated register space\n");
-- 
2.20.1