From: Yang Li <yang.lee@linux.alibaba.com>
To: helgaas@kernel.org, kys@microsoft.com
Cc: sunilmut@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
lorenzo.pieralisi@arm.com, robh@kernel.org, kw@linux.com,
bhelgaas@google.com, mikelley@microsoft.com, maz@kernel.org,
linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org,
Yang Li <yang.lee@linux.alibaba.com>,
Abaci Robot <abaci@linux.alibaba.com>
Subject: [PATCH -next v2] PCI: hv: Fix an ignored error return from bitmap_find_free_region()
Date: Wed, 12 Jan 2022 08:33:24 +0800 [thread overview]
Message-ID: <20220112003324.62755-1-yang.lee@linux.alibaba.com> (raw)
An error return from bitmap_find_free_region() is currently ignored
and we instead return a completely bogus *hwirq from
hv_pci_vec_alloc_device_irq().
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Fixes: c10bdb758ca4 ("PCI: hv: Add arm64 Hyper-V vPCI support")
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
---
Change in v2:
--According to Bjorn's suggestion, the corresponding changes were made.
https://lore.kernel.org/lkml/20220111155412.GA142851@bhelgaas/
drivers/pci/controller/pci-hyperv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 26c9c8ec0989..20ea2ee330b8 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -701,7 +701,7 @@ static int hv_pci_vec_alloc_device_irq(struct irq_domain *domain,
irq_hw_number_t *hwirq)
{
struct hv_pci_chip_data *chip_data = domain->host_data;
- unsigned int index;
+ int index;
/* Find and allocate region from the SPI bitmap */
mutex_lock(&chip_data->map_lock);
--
2.20.1.7.g153144c
next reply other threads:[~2022-01-12 0:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-12 0:33 Yang Li [this message]
2022-01-12 14:26 ` [PATCH -next v2] PCI: hv: Fix an ignored error return from bitmap_find_free_region() Bjorn Helgaas
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