forked from Minki/linux
ioatdma: fix sed pool selection
The array to lookup the sed pool based on the number of sources (pq16_idx_to_sedi) is 16 entries and expects a max source index. However, we pass the total source count which runs off the end of the array when src_cnt == 16. The minimal fix is to just pass src_cnt-1, but given we know the source count is > 8 we can just calculate the sed pool by (src_cnt - 2) >> 3. Cc: Dave Jiang <dave.jiang@intel.com> Cc: <stable@vger.kernel.org> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
parent
ac7d631f7d
commit
5d48b9b5d8
@ -87,13 +87,6 @@ static const u8 pq_idx_to_field[] = { 1, 4, 5, 0, 1, 2, 4, 5 };
|
||||
static const u8 pq16_idx_to_field[] = { 1, 4, 1, 2, 3, 4, 5, 6, 7,
|
||||
0, 1, 2, 3, 4, 5, 6 };
|
||||
|
||||
/*
|
||||
* technically sources 1 and 2 do not require SED, but the op will have
|
||||
* at least 9 descriptors so that's irrelevant.
|
||||
*/
|
||||
static const u8 pq16_idx_to_sed[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||
1, 1, 1, 1, 1, 1, 1 };
|
||||
|
||||
static void ioat3_eh(struct ioat2_dma_chan *ioat);
|
||||
|
||||
static void xor_set_src(struct ioat_raw_descriptor *descs[2],
|
||||
@ -128,12 +121,6 @@ static void pq_set_src(struct ioat_raw_descriptor *descs[2],
|
||||
pq->coef[idx] = coef;
|
||||
}
|
||||
|
||||
static int sed_get_pq16_pool_idx(int src_cnt)
|
||||
{
|
||||
|
||||
return pq16_idx_to_sed[src_cnt];
|
||||
}
|
||||
|
||||
static bool is_jf_ioat(struct pci_dev *pdev)
|
||||
{
|
||||
switch (pdev->device) {
|
||||
@ -994,8 +981,7 @@ __ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result,
|
||||
|
||||
descs[0] = (struct ioat_raw_descriptor *) pq;
|
||||
|
||||
desc->sed = ioat3_alloc_sed(device,
|
||||
sed_get_pq16_pool_idx(src_cnt));
|
||||
desc->sed = ioat3_alloc_sed(device, (src_cnt-2) >> 3);
|
||||
if (!desc->sed) {
|
||||
dev_err(to_dev(chan),
|
||||
"%s: no free sed entries\n", __func__);
|
||||
|
Loading…
Reference in New Issue
Block a user