linux-kernel - [PATCH v12 12/12] PCI: endpoint: Add MSI set maximum restriction

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Message-Id: <7d5a9708368226edd1d461dec4b719ea5bffdf6c.1531818979.git.gustavo.pimentel@synopsys.com>
Date:   Tue, 17 Jul 2018 11:31:32 +0200
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,
        shawn.lin@...k-chips.com
Cc:     linux-pci@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
Subject: [PATCH v12 12/12] 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>
Acked-by: Kishon Vijay Abraham I <kishon@...com>
---
Change v4->v5:
 - New patch file.
Change v5->v6:
 - Nothing changed, just to follow the patch set version.
Change v6->v7:
 - Nothing changed, just to follow the patch set version.
Change v7->v8:
 - Re-sending the patch series.
Change v8->v9:
 - Nothing changed, just to follow the patch set version.
Change v9->v10:
 - Nothing changed, just to follow the patch set version.
Change v10->v11:
 - Nothing changed, just to follow the patch set version.
Change v11->v12:
 - Nothing changed, just to follow the patch set version.

 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