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nvme fixes for 5.10

Browse Source 
- Doorbell Buffer freeing fix (Minwoo Im)
  - CSE log leak fix (Keith Busch)
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Merge tag 'nvme-5.10-2020-11-19' of git://git.infradead.org/nvme into block-5.10

Pull NVMe fixes from Christoph:

"nvme fixes for 5.10

 - Doorbell Buffer freeing fix (Minwoo Im)
 - CSE log leak fix (Keith Busch)"

* tag 'nvme-5.10-2020-11-19' of git://git.infradead.org/nvme:
  nvme: fix memory leak freeing command effects
  nvme: directly cache command effects log
  nvme: free sq/cq dbbuf pointers when dbbuf set fails
This commit is contained in:
Jens Axboe 2020-11-19 09:23:27 -07:00
commit 45f703a0d4
3 changed files with 33 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/nvme/host/core.c
View File

@ -2929,7 +2929,7 @@ int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi,
struct nvme_effects_log **log)
{
struct nvme_cel *cel = xa_load(&ctrl->cels, csi);
struct nvme_effects_log *cel = xa_load(&ctrl->cels, csi);
int ret;
if (cel)
@ -2940,16 +2940,15 @@ static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi,
return -ENOMEM;
ret = nvme_get_log(ctrl, 0x00, NVME_LOG_CMD_EFFECTS, 0, csi,
&cel->log, sizeof(cel->log), 0);
cel, sizeof(*cel), 0);
if (ret) {
kfree(cel);
return ret;
}
cel->csi = csi;
xa_store(&ctrl->cels, cel->csi, cel, GFP_KERNEL);
xa_store(&ctrl->cels, csi, cel, GFP_KERNEL);
out:
*log = &cel->log;
*log = cel;
return 0;
}
@ -4374,6 +4373,19 @@ void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
}
EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);
static void nvme_free_cels(struct nvme_ctrl *ctrl)
{
struct nvme_effects_log *cel;
unsigned long i;
xa_for_each (&ctrl->cels, i, cel) {
xa_erase(&ctrl->cels, i);
kfree(cel);
}
xa_destroy(&ctrl->cels);
}
static void nvme_free_ctrl(struct device *dev)
{
struct nvme_ctrl *ctrl =
@ -4383,8 +4395,7 @@ static void nvme_free_ctrl(struct device *dev)
if (!subsys || ctrl->instance != subsys->instance)
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
xa_destroy(&ctrl->cels);
nvme_free_cels(ctrl);
nvme_mpath_uninit(ctrl);
__free_page(ctrl->discard_page);

6
drivers/nvme/host/nvme.h
View File

@ -226,12 +226,6 @@ struct nvme_fault_inject {
#endif
};
struct nvme_cel {
struct list_head entry;
struct nvme_effects_log log;
u8 csi;
};
struct nvme_ctrl {
bool comp_seen;
enum nvme_ctrl_state state;

15
drivers/nvme/host/pci.c
View File

@ -292,9 +292,21 @@ static void nvme_dbbuf_init(struct nvme_dev *dev,
nvmeq->dbbuf_cq_ei = &dev->dbbuf_eis[cq_idx(qid, dev->db_stride)];
}
static void nvme_dbbuf_free(struct nvme_queue *nvmeq)
{
if (!nvmeq->qid)
return;
nvmeq->dbbuf_sq_db = NULL;
nvmeq->dbbuf_cq_db = NULL;
nvmeq->dbbuf_sq_ei = NULL;
nvmeq->dbbuf_cq_ei = NULL;
}
static void nvme_dbbuf_set(struct nvme_dev *dev)
{
struct nvme_command c;
unsigned int i;
if (!dev->dbbuf_dbs)
return;
@ -308,6 +320,9 @@ static void nvme_dbbuf_set(struct nvme_dev *dev)
dev_warn(dev->ctrl.device, "unable to set dbbuf\n");
/* Free memory and continue on */
nvme_dbbuf_dma_free(dev);
for (i = 1; i <= dev->online_queues; i++)
nvme_dbbuf_free(&dev->queues[i]);
}
}