[bug report] nvme: add support for dynamic quirk configuration via module parameter

[Dan Carpenter <error27@gmail.com>]

Hello Maurizio Lombardi,

Commit 7bb8c40f5ad8 ("nvme: add support for dynamic quirk
configuration via module parameter") from Feb 4, 2026 (linux-next),
leads to the following Smatch static checker warning:

	drivers/nvme/host/pci.c:216 quirks_param_set()
	warn: missing error code here? 'nvme_parse_quirk_entry()' failed. 'err' = '0'

drivers/nvme/host/pci.c
    181 static int quirks_param_set(const char *value, const struct kernel_param *kp)
    182 {
    183         int count, err, i;
    184         struct quirk_entry *qlist;
    185         char *field, *val, *sep_ptr;
    186 
    187         err = param_set_copystring(value, kp);
    188         if (err)
    189                 return err;
    190 
    191         val = kstrdup(value, GFP_KERNEL);
    192         if (!val)
    193                 return -ENOMEM;
    194 
    195         if (!*val)
    196                 goto out_free_val;
    197 
    198         count = 1;
    199         for (i = 0; val[i]; i++) {
    200                 if (val[i] == '-')
    201                         count++;
    202         }
    203 
    204         qlist = kcalloc(count, sizeof(*qlist), GFP_KERNEL);
    205         if (!qlist) {
    206                 err = -ENOMEM;
    207                 goto out_free_val;
    208         }
    209 
    210         i = 0;
    211         sep_ptr = val;
    212         while ((field = strsep(&sep_ptr, "-"))) {
    213                 if (nvme_parse_quirk_entry(field, &qlist[i])) {
    214                         pr_err("nvme: failed to parse quirk string %s\n",
    215                                 value);
--> 216                         goto out_free_qlist;

Propagate the error code from nvme_parse_quirk_entry()?

    217                 }
    218 
    219                 i++;
    220         }
    221 
    222         kfree(nvme_pci_quirk_list);
    223         nvme_pci_quirk_count = count;
    224         nvme_pci_quirk_list  = qlist;
    225         goto out_free_val;
    226 
    227 out_free_qlist:
    228         kfree(qlist);
    229 out_free_val:
    230         kfree(val);
    231         return err;
    232 }

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regards,
dan carpenter