diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2023-05-26 02:33:01 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-05-26 22:34:39 +0200 |
| commit | 793a539ac78843ef9378bb42a44edfbc552a67d5 (patch) | |
| tree | 6e28635e692cca814928f26f60db23d1b280fc90 /drivers | |
| parent | cxl/port: Fix NULL pointer access in devm_cxl_add_port() (diff) | |
| download | linux-793a539ac78843ef9378bb42a44edfbc552a67d5.tar.xz linux-793a539ac78843ef9378bb42a44edfbc552a67d5.zip | |
cxl: Explicitly initialize resources when media is not ready
When media is not ready do not assume that the capacity information from
the identify command is valid, i.e. ->total_bytes
->partition_align_bytes ->{volatile,persistent}_only_bytes. Explicitly
zero out the capacity resources and exit early.
Given zero-init of those fields this patch is functionally equivalent to
the prior state, but it improves readability and robustness going
forward.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/168506118166.3004974.13523455340007852589.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cxl/core/mbox.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 2c8dc7e2b84d..bea9cf31a12d 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1105,6 +1105,13 @@ int cxl_mem_create_range_info(struct cxl_dev_state *cxlds) struct device *dev = cxlds->dev; int rc; + if (!cxlds->media_ready) { + cxlds->dpa_res = DEFINE_RES_MEM(0, 0); + cxlds->ram_res = DEFINE_RES_MEM(0, 0); + cxlds->pmem_res = DEFINE_RES_MEM(0, 0); + return 0; + } + cxlds->dpa_res = (struct resource)DEFINE_RES_MEM(0, cxlds->total_bytes); @@ -1118,12 +1125,10 @@ int cxl_mem_create_range_info(struct cxl_dev_state *cxlds) cxlds->persistent_only_bytes, "pmem"); } - if (cxlds->media_ready) { - rc = cxl_mem_get_partition_info(cxlds); - if (rc) { - dev_err(dev, "Failed to query partition information\n"); - return rc; - } + rc = cxl_mem_get_partition_info(cxlds); + if (rc) { + dev_err(dev, "Failed to query partition information\n"); + return rc; } rc = add_dpa_res(dev, &cxlds->dpa_res, &cxlds->ram_res, 0, |