linux-kernel - [PATCH v5 11/11] PCI: endpoint: Add MSI set maximum restriction.

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Message-Id: <ffa6a3a2877337dab158d19004317b6ae1a0d6da.1529507416.git.gustavo.pimentel@synopsys.com>
Date:   Wed, 20 Jun 2018 17:28:33 +0100
From:   Gustavo Pimentel <gustavo.pimentel@...opsys.com>
To:     bhelgaas@...gle.com, lorenzo.pieralisi@....com,
        Joao.Pinto@...opsys.com, jingoohan1@...il.com, kishon@...com,
        adouglas@...ence.com, jesper.nilsson@...s.com, sboyd@...eaurora.org
Cc:     linux-pci@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
Subject: [PATCH v5 11/11] PCI: endpoint: Add MSI set maximum restriction.

Add pci_epc_set_msi() maximum 32 interrupts validation.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
---
Change v4->v5:
 - New patch file.

 drivers/pci/endpoint/pci-epc-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index c72e656..094dcc3 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -201,7 +201,8 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
 	u8 encode_int;
 	unsigned long flags;
 
-	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
+	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
+	    interrupts > 32)
 		return -EINVAL;
 
 	if (!epc->ops->set_msi)
-- 
2.7.4