diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-11 14:54:22 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-11-17 15:15:18 +0100 |
| commit | 2f2940d168236a92df524a1bd99fc7b0325918b5 (patch) | |
| tree | 99959d69b2a4e74b5d0c0c440b698abeda061d4f /kernel/irq | |
| parent | befd780253e774ea9388dd8dfad7c627a0aa7e02 (diff) | |
| download | linux-2f2940d168236a92df524a1bd99fc7b0325918b5.tar.bz2 | |
genirq/msi: Remove filter from msi_free_descs_free_range()
When a range of descriptors is freed then all of them are not associated to
a linux interrupt. Remove the filter and add a warning to the free function.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20221111122013.888850936@linutronix.de
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/msi.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index bba6359d8450..1ca484698bda 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -120,7 +120,7 @@ static int msi_add_simple_msi_descs(struct device *dev, unsigned int index, unsi fail_mem: ret = -ENOMEM; fail: - msi_free_msi_descs_range(dev, MSI_DESC_ALL, index, last); + msi_free_msi_descs_range(dev, index, last); return ret; } @@ -141,12 +141,11 @@ static bool msi_desc_match(struct msi_desc *desc, enum msi_desc_filter filter) /** * msi_free_msi_descs_range - Free MSI descriptors of a device * @dev: Device to free the descriptors - * @filter: Descriptor state filter * @first_index: Index to start freeing from * @last_index: Last index to be freed */ -void msi_free_msi_descs_range(struct device *dev, enum msi_desc_filter filter, - unsigned int first_index, unsigned int last_index) +void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, + unsigned int last_index) { struct xarray *xa = &dev->msi.data->__store; struct msi_desc *desc; @@ -155,10 +154,12 @@ void msi_free_msi_descs_range(struct device *dev, enum msi_desc_filter filter, lockdep_assert_held(&dev->msi.data->mutex); xa_for_each_range(xa, idx, desc, first_index, last_index) { - if (msi_desc_match(desc, filter)) { - xa_erase(xa, idx); - msi_free_desc(desc); - } + xa_erase(xa, idx); + + /* Leak the descriptor when it is still referenced */ + if (WARN_ON_ONCE(msi_desc_match(desc, MSI_DESC_ASSOCIATED))) + continue; + msi_free_desc(desc); } } @@ -739,7 +740,7 @@ int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev, fail: for (--virq; virq >= virq_base; virq--) irq_domain_free_irqs_common(domain, virq, 1); - msi_free_msi_descs_range(dev, MSI_DESC_ALL, virq_base, virq_base + nvec - 1); + msi_free_msi_descs_range(dev, virq_base, virq_base + nvec - 1); unlock: msi_unlock_descs(dev); return ret; |