ath6kl: Refactor refactor ath6kl_sdio_setup_scat_resource()

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index 6fbc27ec2cfd1ca2c8e43f5f3ae6212b9efe77c8..36f25fc457487f54762d3afcb059eac3c2888ab6 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -269,6 +269,55 @@ static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio,
        return status;
 }
 
+static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio,
+                                          int n_scat_entry, int n_scat_req,
+                                          bool virt_scat)
+{
+       struct hif_scatter_req *s_req;
+       struct bus_request *bus_req;
+       int i, scat_req_sz, scat_list_sz, sg_sz = 0;
+
+       scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item);
+       scat_req_sz = sizeof(*s_req) + scat_list_sz;
+
+       if (!virt_scat)
+               sg_sz = sizeof(struct scatterlist) * n_scat_entry;
+
+       for (i = 0; i < n_scat_req; i++) {
+               /* allocate the scatter request */
+               s_req = kzalloc(scat_req_sz, GFP_KERNEL);
+               if (!s_req)
+                       return -ENOMEM;
+
+               if (sg_sz) {
+                       /* allocate sglist */
+                       s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL);
+
+                       if (!s_req->sgentries) {
+                               kfree(s_req);
+                               return -ENOMEM;
+                       }
+               }
+
+               /* allocate a bus request for this scatter request */
+               bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
+               if (!bus_req) {
+                       kfree(s_req->sgentries);
+                       kfree(s_req);
+                       return -ENOMEM;
+               }
+
+               /* assign the scatter request to this bus request */
+               bus_req->scat_req = s_req;
+               s_req->busrequest = bus_req;
+
+               /* add it to the scatter pool */
+               hif_scatter_req_add(ar_sdio->ar, s_req);
+       }
+
+       return 0;
+}
+
 /* clean up scatter support */
 static void ath6kl_sdio_cleanup_scat_resource(struct ath6kl_sdio *ar_sdio)
 {
@@ -296,9 +345,7 @@ static void ath6kl_sdio_cleanup_scat_resource(struct ath6kl_sdio *ar_sdio)
 static int ath6kl_sdio_setup_scat_resource(struct ath6kl_sdio *ar_sdio,
                                           struct hif_dev_scat_sup_info *pinfo)
 {
-       struct hif_scatter_req *s_req;
-       struct bus_request *bus_req;
-       int i, scat_req_sz, scat_list_sz, sg_sz;
+       int ret = 0;
 
        /* check if host supports scatter and it meets our requirements */
        if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) {
@@ -312,51 +359,19 @@ static int ath6kl_sdio_setup_scat_resource(struct ath6kl_sdio *ar_sdio,
                   "hif-scatter enabled: max scatter req : %d entries: %d\n",
                   MAX_SCATTER_REQUESTS, MAX_SCATTER_ENTRIES_PER_REQ);
 
-       scat_list_sz = (MAX_SCATTER_ENTRIES_PER_REQ - 1) *
-                      sizeof(struct hif_scatter_item);
-       scat_req_sz = sizeof(*s_req) + scat_list_sz;
-
-       sg_sz = sizeof(struct scatterlist) * MAX_SCATTER_ENTRIES_PER_REQ;
-
-       for (i = 0; i < MAX_SCATTER_REQUESTS; i++) {
-               /* allocate the scatter request */
-               s_req = kzalloc(scat_req_sz, GFP_KERNEL);
-               if (!s_req)
-                       goto fail_setup_scat;
-
-               /* allocate sglist */
-               s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL);
-
-               if (!s_req->sgentries) {
-                       kfree(s_req);
-                       goto fail_setup_scat;
-               }
-
-               /* allocate a bus request for this scatter request */
-               bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
-               if (!bus_req) {
-                       kfree(s_req->sgentries);
-                       kfree(s_req);
-                       goto fail_setup_scat;
-               }
-
-               /* assign the scatter request to this bus request */
-               bus_req->scat_req = s_req;
-               s_req->busrequest = bus_req;
-               /* add it to the scatter pool */
-               hif_scatter_req_add(ar_sdio->ar, s_req);
+       ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio,
+                                             MAX_SCATTER_ENTRIES_PER_REQ,
+                                             MAX_SCATTER_REQUESTS, 0);
+       if (ret) {
+               ath6kl_err("hif-scatter: failed to alloc scatter resources !\n");
+               ath6kl_sdio_cleanup_scat_resource(ar_sdio);
+               return ret;
        }
 
        pinfo->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ;
        pinfo->max_xfer_szper_scatreq = MAX_SCATTER_REQ_TRANSFER_SIZE;
 
        return 0;
-
-fail_setup_scat:
-       ath6kl_err("hif-scatter: failed to alloc scatter resources !\n");
-       ath6kl_sdio_cleanup_scat_resource(ar_sdio);
-
-       return -ENOMEM;
 }
 
 static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf,