linux-kernel - [PATCH RFC v2 08/29] PCI/MSI: Make pci_enable

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Message-Id: <93e145deeb238ad805196762cae696d3ae67f812.1382103786.git.agordeev@redhat.com>
Date:	Fri, 18 Oct 2013 19:12:08 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Michael Ellerman <michael@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tejun Heo <tj@...nel.org>,
	Ben Hutchings <bhutchings@...arflare.com>,
	David Laight <David.Laight@...LAB.COM>,
	Mark Lord <kernel@...rt.ca>, "H. Peter Anvin" <hpa@...or.com>,
	linux-pci@...r.kernel.org
Subject: [PATCH RFC v2 08/29] PCI/MSI: Make pci_enable_msix() 'nvec' argument unsigned int

Make pci_enable_msix() and pci_enable_msi_block() consistent
with regard to the type of 'nvec' argument. Indeed, a number
of vectors to allocate is a natural value, so make it unsigned.

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 Documentation/PCI/MSI-HOWTO.txt |    3 ++-
 drivers/pci/msi.c               |    3 ++-
 include/linux/pci.h             |    5 +++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/Documentation/PCI/MSI-HOWTO.txt b/Documentation/PCI/MSI-HOWTO.txt
index a091780..845edb5 100644
--- a/Documentation/PCI/MSI-HOWTO.txt
+++ b/Documentation/PCI/MSI-HOWTO.txt
@@ -190,7 +190,8 @@ same number.
 
 4.3.1 pci_enable_msix
 
-int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
+int pci_enable_msix(struct pci_dev *dev,
+		    struct msix_entry *entries, unsigned int nvec)
 
 Calling this function asks the PCI subsystem to allocate 'nvec' MSIs.
 The 'entries' argument is a pointer to an array of msix_entry structs
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index bbe3d3d..fdae3a4 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -932,7 +932,8 @@ int pci_msix_table_size(struct pci_dev *dev)
  * of irqs or MSI-X vectors available. Driver should use the returned value to
  * re-send its request.
  **/
-int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
+int pci_enable_msix(struct pci_dev *dev,
+		    struct msix_entry *entries, unsigned int nvec)
 {
 	int status, nr_entries;
 	int i, j;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 5cfe54c..d6832de 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1167,7 +1167,7 @@ static inline int pci_msix_table_size(struct pci_dev *dev)
 	return 0;
 }
 static inline int pci_enable_msix(struct pci_dev *dev,
-				  struct msix_entry *entries, int nvec)
+				  struct msix_entry *entries, int unsigned nvec)
 {
 	return -ENOSYS;
 }
@@ -1192,7 +1192,8 @@ int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec);
 void pci_msi_shutdown(struct pci_dev *dev);
 void pci_disable_msi(struct pci_dev *dev);
 int pci_msix_table_size(struct pci_dev *dev);
-int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec);
+int pci_enable_msix(struct pci_dev *dev,
+		    struct msix_entry *entries, unsigned int nvec);
 void pci_msix_shutdown(struct pci_dev *dev);
 void pci_disable_msix(struct pci_dev *dev);
 void msi_remove_pci_irq_vectors(struct pci_dev *dev);
-- 
1.7.7.6

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