/* * generic arrays */ #include #include #include /** * snd_array_new - get a new element from the given array * @array: the array object * * Get a new element from the given array. If it exceeds the * pre-allocated array size, re-allocate the array. * * Returns NULL if allocation failed. */ void *snd_array_new(struct snd_array *array) { if (snd_BUG_ON(!array->elem_size)) return NULL; if (array->used >= array->alloced) { int num = array->alloced + array->alloc_align; int oldsize = array->alloced * array->elem_size; int size = (num + 1) * array->elem_size; void *nlist; if (snd_BUG_ON(num >= 4096)) return NULL; nlist = krealloc(array->list, size, GFP_KERNEL); if (!nlist) return NULL; memset(nlist + oldsize, 0, size - oldsize); array->list = nlist; array->alloced = num; } return snd_array_elem(array, array->used++); } EXPORT_SYMBOL_GPL(snd_array_new); /** * snd_array_free - free the given array elements * @array: the array object */ void snd_array_free(struct snd_array *array) { kfree(array->list); array->used = 0; array->alloced = 0; array->list = NULL; } EXPORT_SYMBOL_GPL(snd_array_free); vate-remove net-next plumbingsTobias Klauser
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /include/crypto/ctr.h
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'include/crypto/ctr.h')