There is ndp16_opts and ndp32_opts which are both global and only one
member is ever written. This patch makes the variable read-only and
moves the one member that is ever written into the private struct f_ncm.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
drivers/usb/gadget/f_ncm.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/gadget/f_ncm.c b/drivers/usb/gadget/f_ncm.c
index 449f945..ee19bc8 100644
--- a/drivers/usb/gadget/f_ncm.c
+++ b/drivers/usb/gadget/f_ncm.c
@@ -56,8 +56,9 @@ struct f_ncm {
u8 notify_state;
bool is_open;
- struct ndp_parser_opts *parser_opts;
+ const struct ndp_parser_opts *parser_opts;
bool is_crc;
+ u32 ndp_sign;
/*
* for notification, it is accessed from both
@@ -390,8 +391,8 @@ struct ndp_parser_opts {
.next_fp_index = 2, \
}
-static struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS;
-static struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS;
+static const struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS;
+static const struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS;
static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
{
@@ -732,8 +733,7 @@ static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
default:
goto invalid;
}
- ncm->parser_opts->ndp_sign &= ~NCM_NDP_HDR_CRC_MASK;
- ncm->parser_opts->ndp_sign |= ndp_hdr_crc;
+ ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc;
value = 0;
break;
}
@@ -875,7 +875,7 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
int ndp_align;
int ndp_pad;
unsigned max_size = ncm->port.fixed_in_len;
- struct ndp_parser_opts *opts = ncm->parser_opts;
+ const struct ndp_parser_opts *opts = ncm->parser_opts;
unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
@@ -921,7 +921,7 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
tmp = (void *)tmp + ndp_pad;
/* NDP */
- put_unaligned_le32(opts->ndp_sign, tmp); /* dwSignature */
+ put_unaligned_le32(ncm->ndp_sign, tmp); /* dwSignature */
tmp += 2;
/* wLength */
put_unaligned_le16(ncb_len - opts->nth_size - pad, tmp++);
@@ -965,7 +965,7 @@ static int ncm_unwrap_ntb(struct gether *port,
struct sk_buff *skb2;
int ret = -EINVAL;
unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
- struct ndp_parser_opts *opts = ncm->parser_opts;
+ const struct ndp_parser_opts *opts = ncm->parser_opts;
unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
int dgram_counter;
@@ -1002,7 +1002,7 @@ static int ncm_unwrap_ntb(struct gether *port,
/* walk through NDP */
tmp = ((void *)skb->data) + index;
- if (get_unaligned_le32(tmp) != opts->ndp_sign) {
+ if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
goto err;
}
--
1.7.10.4
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