/* * Regression3 * Description: * Helper radix_tree_iter_retry resets next_index to the current index. * In following radix_tree_next_slot current chunk size becomes zero. * This isn't checked and it tries to dereference null pointer in slot. * * Helper radix_tree_iter_resume reset slot to NULL and next_index to index + 1, * for tagger iteraction it also must reset cached tags in iterator to abort * next radix_tree_next_slot and go to slow-path into radix_tree_next_chunk. * * Running: * This test should run to completion immediately. The above bug would * cause it to segfault. * * Upstream commit: * Not yet */ #include #include #include #include #include #include #include "regression.h" void regression3_test(void) { RADIX_TREE(root, GFP_KERNEL); void *ptr0 = (void *)4ul; void *ptr = (void *)8ul; struct radix_tree_iter iter; void **slot; bool first; printf("running regression test 3 (should take milliseconds)\n"); radix_tree_insert(&root, 0, ptr0); radix_tree_tag_set(&root, 0, 0); first = true; radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) { printf("tagged %ld %p\n", iter.index, *slot); if (first) { radix_tree_insert(&root, 1, ptr); radix_tree_tag_set(&root, 1, 0); first = false; } if (radix_tree_deref_retry(*slot)) { printf("retry at %ld\n", iter.index); slot = radix_tree_iter_retry(&iter); continue; } } radix_tree_delete(&root, 1); first = true; radix_tree_for_each_slot(slot, &root, &iter, 0) { printf("slot %ld %p\n", iter.index, *slot); if (first) { radix_tree_insert(&root, 1, ptr); first = false; } if (radix_tree_deref_retry(*slot)) { printk("retry at %ld\n", iter.index); slot = radix_tree_iter_retry(&iter); continue; } } radix_tree_delete(&root, 1); first = true; radix_tree_for_each_contig(slot, &root, &iter, 0) { printk("contig %ld %p\n", iter.index, *slot); if (first) { radix_tree_insert(&root, 1, ptr); first = false; } if (radix_tree_deref_retry(*slot)) { printk("retry at %ld\n", iter.index); slot = radix_tree_iter_retry(&iter); continue; } } radix_tree_for_each_slot(slot, &root, &iter, 0) { printf("slot %ld %p\n", iter.index, *slot); if (!iter.index) { printf("next at %ld\n", iter.index); slot = radix_tree_iter_resume(slot, &iter); } } radix_tree_for_each_contig(slot, &root, &iter, 0) { printf("contig %ld %p\n", iter.index, *slot); if (!iter.index) { printf("next at %ld\n", iter.index); slot = radix_tree_iter_resume(slot, &iter); } } radix_tree_tag_set(&root, 0, 0); radix_tree_tag_set(&root, 1, 0); radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) { printf("tagged %ld %p\n", iter.index, *slot); if (!iter.index) { printf("next at %ld\n", iter.index); slot = radix_tree_iter_resume(slot, &iter); } } radix_tree_delete(&root, 0); radix_tree_delete(&root, 1); printf("regression test 3 passed\n"); } >net/ncsi
diff options
context:
space:
mode:
authorLinus Walleij <linus.walleij@linaro.org>2016-11-12 15:22:38 +0100
committerMark Brown <broonie@kernel.org>2016-11-13 09:22:37 +0000
commit295070e9aa015abb9b92cccfbb1e43954e938133 (patch)
treed0a08e7ce280bc877e22424437dbe59fa1857d9a /net/ncsi
parent1001354ca34179f3db924eb66672442a173147dc (diff)
regulator: stw481x-vmmc: fix ages old enable error
The regulator has never been properly enabled, it has been dormant all the time. It's strange that MMC was working at all, but it likely worked by the signals going through the levelshifter and reaching the card anyways. Fixes: 3615a34ea1a6 ("regulator: add STw481x VMMC driver") Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'net/ncsi')