From: Dexuan Cui <decui@microsoft.com>
To: quic_jhugo@quicinc.com, wei.liu@kernel.org, kys@microsoft.com,
haiyangz@microsoft.com, sthemmin@microsoft.com,
lpieralisi@kernel.org, bhelgaas@google.com,
linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, mikelley@microsoft.com,
robh@kernel.org, kw@linux.com, helgaas@kernel.org,
alex.williamson@redhat.com, boqun.feng@gmail.com,
Boqun.Feng@microsoft.com
Cc: Dexuan Cui <decui@microsoft.com>,
Carl Vanderlip <quic_carlv@quicinc.com>
Subject: [PATCH] PCI: hv: Fix the definiton of vector in hv_compose_msi_msg()
Date: Mon, 15 Aug 2022 11:55:05 -0700 [thread overview]
Message-ID: <20220815185505.7626-1-decui@microsoft.com> (raw)
The local variable 'vector' must be u32 rather than u8: see the
struct hv_msi_desc3.
'vector_count' should be u16 rather than u8: see struct hv_msi_desc,
hv_msi_desc2 and hv_msi_desc3.
Fixes: a2bad844a67b ("PCI: hv: Fix interrupt mapping for multi-MSI")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Cc: Jeffrey Hugo <quic_jhugo@quicinc.com>
Cc: Carl Vanderlip <quic_carlv@quicinc.com>
---
The patch should be appplied after the earlier patch:
[PATCH] PCI: hv: Only reuse existing IRTE allocation for Multi-MSI
https://lwn.net/ml/linux-kernel/20220804025104.15673-1-decui%40microsoft.com/
drivers/pci/controller/pci-hyperv.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 65d0dab25deb..53580899c859 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1614,7 +1614,7 @@ static void hv_pci_compose_compl(void *context, struct pci_response *resp,
static u32 hv_compose_msi_req_v1(
struct pci_create_interrupt *int_pkt, struct cpumask *affinity,
- u32 slot, u8 vector, u8 vector_count)
+ u32 slot, u8 vector, u16 vector_count)
{
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = slot;
@@ -1642,7 +1642,7 @@ static int hv_compose_msi_req_get_cpu(struct cpumask *affinity)
static u32 hv_compose_msi_req_v2(
struct pci_create_interrupt2 *int_pkt, struct cpumask *affinity,
- u32 slot, u8 vector, u8 vector_count)
+ u32 slot, u8 vector, u16 vector_count)
{
int cpu;
@@ -1661,7 +1661,7 @@ static u32 hv_compose_msi_req_v2(
static u32 hv_compose_msi_req_v3(
struct pci_create_interrupt3 *int_pkt, struct cpumask *affinity,
- u32 slot, u32 vector, u8 vector_count)
+ u32 slot, u32 vector, u16 vector_count)
{
int cpu;
@@ -1702,7 +1702,8 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
struct tran_int_desc *int_desc;
struct msi_desc *msi_desc;
bool multi_msi;
- u8 vector, vector_count;
+ u32 vector; /* Must be u32: see the struct hv_msi_desc3 */
+ u16 vector_count;
struct {
struct pci_packet pci_pkt;
union {
--
2.25.1
next reply other threads:[~2022-08-15 20:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-15 18:55 Dexuan Cui [this message]
2022-08-15 20:35 ` [PATCH] PCI: hv: Fix the definiton of vector in hv_compose_msi_msg() Bjorn Helgaas
2022-08-15 21:10 ` Dexuan Cui
2022-08-19 15:52 ` Wei Liu
2022-08-19 15:57 ` Dexuan Cui
2022-08-16 16:01 ` Jeffrey Hugo
2022-08-16 21:14 ` Dexuan Cui
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