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- Fix locking when accessing device MSI descriptors 

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Merge tag 'irq_urgent_for_v5.18_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fix from Borislav Petkov:

 - Fix locking when accessing device MSI descriptors

* tag 'irq_urgent_for_v5.18_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  bus: fsl-mc-msi: Fix MSI descriptor mutex lock for msi_first_desc()
This commit is contained in:
Linus Torvalds 2022-05-01 09:30:47 -07:00
parent 57ae8a4921 c7d2f89fea
commit d4af0c1723
1 changed files with 5 additions and 1 deletions
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6
drivers/bus/fsl-mc/fsl-mc-msi.c
View File

@ -224,8 +224,12 @@ int fsl_mc_msi_domain_alloc_irqs(struct device *dev, unsigned int irq_count)
if (error) if (error)
return error; return error;
msi_lock_descs(dev);
if (msi_first_desc(dev, MSI_DESC_ALL)) if (msi_first_desc(dev, MSI_DESC_ALL))
return -EINVAL; error = -EINVAL;
msi_unlock_descs(dev);
if (error)
return error;
/* /*
* NOTE: Calling this function will trigger the invocation of the * NOTE: Calling this function will trigger the invocation of the