redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

IOMMU Fix for v5.2-rc5: 

- Revert a commit from the previous pile of fixes which causes
 	  new lockdep splats. It is better to revert it for now and work
 	  on a better and more well tested fix.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEr9jSbILcajRFYWYyK/BELZcBGuMFAl0Og/QACgkQK/BELZcB
 GuOkZhAAqzTHRndHUzXpSr7L+MrioQI3pmPKuyK72pxQyhuNlwRNn84c8pUxyQe/
 0I6xxvPRu/763BepA0iHW4wKuFtuM299y95STxh7pcEV9+LSTdsrl7TRDxebDG+A
 I7ZJoPlDSrZfnAdlzXAXF1GDmNS+6tM3zRYaH/DSBk5EQhmYLZ6qGiFfrY3DZ7A4
 Y6MhP4OK0bsTE6nL8MFvxGXQA00CdiYIwxBbdCy0uYyOMIrGRE6/Wu+n6Ld1f3PM
 bXuJrj3ZV4Wm1emolG5CWACtJcwvvC+/gn+qQ23mTQvSe4cwK97lUgZ7dS3sTpfr
 ZZFAyzTKAwLN7mA3n/5vu0HI6ZwfipE1izkZhTqHzR/Q+Gy0y0afhGuJOWY5N7Y7
 2AGxp78e3cuIMN8VChHjSlpRvg/EUA9xgX1oylX3lR/YJLW62V1QXmUiHU66KTuo
 QESUSw6IPedqsoLmAJeaP7a5hC+MdliliQEJKOhbluyLfHnMZMo0Ao0jCn/Qtpqr
 S+PfiroXKWaP6jsRKPD6p9mE4g4S01pREGnfTULH5RKqBYu8LjPjV++xWNxoy66Q
 bhoxkIX8+5x9eUlX9zKIm9faqC8P4VbFdu7P6E/wwzeQrRlMYHpWCyBHhmSEj1Xh
 loLvJe5mQv9l+eKWWh4CUngripM1tSnAONWBRsnz0Bz1LoraWqQ=
 =JRtp
 -----END PGP SIGNATURE-----

Merge tag 'iommu-fix-v5.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fix from Joerg Roedel:
 "Revert a commit from the previous pile of fixes which causes new
  lockdep splats. It is better to revert it for now and work on a better
  and more well tested fix"

* tag 'iommu-fix-v5.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  Revert "iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock"
hifive-unleashed-5.2
Linus Torvalds 2019-06-22 14:08:47 -07:00
parent b253d5f3ec 0aafc8ae66
commit 6698a71a1e
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/iommu/intel-iommu.c
View File

@ -2504,7 +2504,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
}
}
spin_lock(&iommu->lock);
spin_lock_irqsave(&device_domain_lock, flags);
if (dev)
found = find_domain(dev);
@ -2520,16 +2519,17 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
if (found) {
spin_unlock_irqrestore(&device_domain_lock, flags);
spin_unlock(&iommu->lock);
free_devinfo_mem(info);
/* Caller must free the original domain */
return found;
}
spin_lock(&iommu->lock);
ret = domain_attach_iommu(domain, iommu);
spin_unlock(&iommu->lock);
if (ret) {
spin_unlock_irqrestore(&device_domain_lock, flags);
spin_unlock(&iommu->lock);
free_devinfo_mem(info);
return NULL;
}
@ -2539,7 +2539,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
if (dev)
dev->archdata.iommu = info;
spin_unlock_irqrestore(&device_domain_lock, flags);
spin_unlock(&iommu->lock);
/* PASID table is mandatory for a PCI device in scalable mode. */
if (dev && dev_is_pci(dev) && sm_supported(iommu)) {