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crypto: hisilicon/qm - add pci bdf number check

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The pci bdf number check is added for qos written by using the pci api.
Directly get the devfn by pci_dev, so delete some redundant code.
And use the kstrtoul instead of sscanf to simplify code.

Signed-off-by: Kai Ye <yekai13@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kai Ye 2022-10-22 01:17:45 +00:00 committed by Herbert Xu
parent 3efe90af4c
commit 22d7a6c39c
1 changed files with 12 additions and 25 deletions
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37
drivers/crypto/hisilicon/qm.c
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@ -4589,49 +4589,36 @@ err_put_dfx_access:
return ret;
}
static ssize_t qm_qos_value_init(const char *buf, unsigned long *val)
{
int buflen = strlen(buf);
int ret, i;
for (i = 0; i < buflen; i++) {
if (!isdigit(buf[i]))
return -EINVAL;
}
ret = sscanf(buf, "%lu", val);
if (ret != QM_QOS_VAL_NUM)
return -EINVAL;
return 0;
}
static ssize_t qm_get_qos_value(struct hisi_qm *qm, const char *buf,
unsigned long *val,
unsigned int *fun_index)
{
struct bus_type *bus_type = qm->pdev->dev.bus;
char tbuf_bdf[QM_DBG_READ_LEN] = {0};
char val_buf[QM_DBG_READ_LEN] = {0};
u32 tmp1, device, function;
int ret, bus;
struct pci_dev *pdev;
struct device *dev;
int ret;
ret = sscanf(buf, "%s %s", tbuf_bdf, val_buf);
if (ret != QM_QOS_PARAM_NUM)
return -EINVAL;
ret = qm_qos_value_init(val_buf, val);
ret = kstrtoul(val_buf, 10, val);
if (ret || *val == 0 || *val > QM_QOS_MAX_VAL) {
pci_err(qm->pdev, "input qos value is error, please set 1~1000!\n");
return -EINVAL;
}
ret = sscanf(tbuf_bdf, "%u:%x:%u.%u", &tmp1, &bus, &device, &function);
if (ret != QM_QOS_BDF_PARAM_NUM) {
pci_err(qm->pdev, "input pci bdf value is error!\n");
return -EINVAL;
dev = bus_find_device_by_name(bus_type, NULL, tbuf_bdf);
if (!dev) {
pci_err(qm->pdev, "input pci bdf number is error!\n");
return -ENODEV;
}
*fun_index = PCI_DEVFN(device, function);
pdev = container_of(dev, struct pci_dev, dev);
*fun_index = pdev->devfn;
return 0;
}