tree: git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git x86/vt-d
head: 2238c0827a9bfa8d517e3175110ed603fb7b9537
commit: 50690762cfe32abadbaa5b22bebe3855e5b8ede8 [2/3] iommu/vt-d: Fix leaked
ioremap mapping
reproduce:
# apt-get install sparse
git checkout 50690762cfe32abadbaa5b22bebe3855e5b8ede8
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
drivers/iommu/intel_irq_remapping.c:411:22: sparse: incorrect type in
assignment (different address spaces)
drivers/iommu/intel_irq_remapping.c:411:22: expected struct irte
*old_ir_table
drivers/iommu/intel_irq_remapping.c:411:22: got void [noderef] <asn:2>*
>> drivers/iommu/intel_irq_remapping.c:429:17: sparse: incorrect type in
>> argument 1 (different address spaces)
drivers/iommu/intel_irq_remapping.c:429:17: expected void volatile
[noderef] <asn:2>*addr
drivers/iommu/intel_irq_remapping.c:429:17: got struct irte *old_ir_table
vim +429 drivers/iommu/intel_irq_remapping.c
405 return -EINVAL;
406
407 irt_phys = irta & VTD_PAGE_MASK;
408 size = INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte);
409
410 /* Map the old IR table */
> 411 old_ir_table = ioremap_cache(irt_phys, size);
412 if (!old_ir_table)
413 return -ENOMEM;
414
415 /* Copy data over */
416 memcpy(iommu->ir_table->base, old_ir_table, size);
417
418 __iommu_flush_cache(iommu, iommu->ir_table->base, size);
419
420 /*
421 * Now check the table for used entries and mark those as
422 * allocated in the bitmap
423 */
424 for (i = 0; i < INTR_REMAP_TABLE_ENTRIES; i++) {
425 if (iommu->ir_table->base[i].present)
426 bitmap_set(iommu->ir_table->bitmap, i, 1);
427 }
428
> 429 iounmap(old_ir_table);
430
431 return 0;
432 }
---
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