1 files changed, 49 insertions, 16 deletions

diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
index 6636354b48ce..e1035c895808 100644
--- a/drivers/mmc/core/sdio_cis.c
+++ b/drivers/mmc/core/sdio_cis.c
@@ -98,6 +98,22 @@ static const unsigned char speed_val[16] =
 static const unsigned int speed_unit[8] =
         { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
 
+/* FUNCE tuples with these types get passed to SDIO drivers */
+static const unsigned char funce_type_whitelist[] = {
+        4 /* CISTPL_FUNCE_LAN_NODE_ID used in Broadcom cards */
+};
+
+static int cistpl_funce_whitelisted(unsigned char type)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(funce_type_whitelist); i++) {
+                if (funce_type_whitelist[i] == type)
+                        return 1;
+        }
+        return 0;
+}
+
 static int cistpl_funce_common(struct mmc_card *card,
                                const unsigned char *buf, unsigned size)
 {
@@ -120,6 +136,10 @@ static int cistpl_funce_func(struct sdio_func *func,
         unsigned vsn;
         unsigned min_size;
 
+        /* let SDIO drivers take care of whitelisted FUNCE tuples */
+        if (cistpl_funce_whitelisted(buf[0]))
+                return -EILSEQ;
+
         vsn = func->card->cccr.sdio_vsn;
         min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
 
@@ -154,13 +174,12 @@ static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
         else
                 ret = cistpl_funce_common(card, buf, size);
 
-        if (ret) {
+        if (ret && ret != -EILSEQ) {
                 printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u "
                        "type %u\n", mmc_hostname(card->host), size, buf[0]);
-                return ret;
         }
 
-        return 0;
+        return ret;
 }
 
 typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
@@ -253,21 +272,12 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
                 for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
                         if (cis_tpl_list[i].code == tpl_code)
                                 break;
-                if (i >= ARRAY_SIZE(cis_tpl_list)) {
-                        /* this tuple is unknown to the core */
-                        this->next = NULL;
-                        this->code = tpl_code;
-                        this->size = tpl_link;
-                        *prev = this;
-                        prev = &this->next;
-                        printk(KERN_DEBUG
-                               "%s: queuing CIS tuple 0x%02x length %u\n",
-                               mmc_hostname(card->host), tpl_code, tpl_link);
-                } else {
+                if (i < ARRAY_SIZE(cis_tpl_list)) {
                         const struct cis_tpl *tpl = cis_tpl_list + i;
                         if (tpl_link < tpl->min_size) {
                                 printk(KERN_ERR
-                                       "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n",
+                                       "%s: bad CIS tuple 0x%02x"
+                                       " (length = %u, expected >= %u)\n",
                                        mmc_hostname(card->host),
                                        tpl_code, tpl_link, tpl->min_size);
                                 ret = -EINVAL;
@@ -275,7 +285,30 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
                                 ret = tpl->parse(card, func,
                                                  this->data, tpl_link);
                         }
-                        kfree(this);
+                        /*
+                         * We don't need the tuple anymore if it was
+                         * successfully parsed by the SDIO core or if it is
+                         * not going to be parsed by SDIO drivers.
+                         */
+                        if (!ret || ret != -EILSEQ)
+                                kfree(this);
+                } else {
+                        /* unknown tuple */
+                        ret = -EILSEQ;
+                }
+
+                if (ret == -EILSEQ) {
+                        /* this tuple is unknown to the core or whitelisted */
+                        this->next = NULL;
+                        this->code = tpl_code;
+                        this->size = tpl_link;
+                        *prev = this;
+                        prev = &this->next;
+                        printk(KERN_DEBUG
+                               "%s: queuing CIS tuple 0x%02x length %u\n",
+                               mmc_hostname(card->host), tpl_code, tpl_link);
+                        /* keep on analyzing tuples */
+                        ret = 0;
                 }
 
                 ptr += tpl_link;