IB/mthca: Stop returning separate error and status from FW commands

Instead of having firmware command functions return an error and also
a status, leading to code like:

	err = mthca_FW_COMMAND(..., &status);
	if (err)
		goto out;
        if (status) {
		err = -E...;
		goto out;
	}

all over the place, just handle the FW status inside the FW command
handling code (the way mlx4 does it), so we can simply write:

	err = mthca_FW_COMMAND(...);
	if (err)
		goto out;

In addition to simplifying the source code, this also saves a healthy
chunk of text:

    add/remove: 0/0 grow/shrink: 10/88 up/down: 510/-3357 (-2847)
    function                                     old     new   delta
    static.trans_table                           324     584    +260
    mthca_cmd_poll                               352     477    +125
    mthca_cmd_wait                               511     567     +56
    mthca_table_put                              213     240     +27
    mthca_cleanup_db_tab                         372     387     +15
    __mthca_remove_one                           314     323      +9
    mthca_cleanup_user_db_tab                    275     283      +8
    __mthca_init_one                            1738    1746      +8
    mthca_cleanup                                 20      21      +1
    mthca_MAD_IFC                               1081    1082      +1
    mthca_MGID_HASH                               43      40      -3
    mthca_MAP_ICM_AUX                             23      20      -3
    mthca_MAP_ICM                                 19      16      -3
    mthca_MAP_FA                                  23      20      -3
    mthca_READ_MGM                                43      38      -5
    mthca_QUERY_SRQ                               43      38      -5
    mthca_QUERY_QP                                59      54      -5
    mthca_HW2SW_SRQ                               43      38      -5
    mthca_HW2SW_MPT                               60      55      -5
    mthca_HW2SW_EQ                                43      38      -5
    mthca_HW2SW_CQ                                43      38      -5
    mthca_free_icm_table                         120     114      -6
    mthca_query_srq                              214     206      -8
    mthca_free_qp                                662     654      -8
    mthca_cmd                                     38      28     -10
    mthca_alloc_db                              1321    1311     -10
    mthca_setup_hca                             1067    1055     -12
    mthca_WRITE_MTT                               35      22     -13
    mthca_WRITE_MGM                               40      27     -13
    mthca_UNMAP_ICM_AUX                           36      23     -13
    mthca_UNMAP_FA                                36      23     -13
    mthca_SYS_DIS                                 36      23     -13
    mthca_SYNC_TPT                                36      23     -13
    mthca_SW2HW_SRQ                               35      22     -13
    mthca_SW2HW_MPT                               35      22     -13
    mthca_SW2HW_EQ                                35      22     -13
    mthca_SW2HW_CQ                                35      22     -13
    mthca_RUN_FW                                  36      23     -13
    mthca_DISABLE_LAM                             36      23     -13
    mthca_CLOSE_IB                                36      23     -13
    mthca_CLOSE_HCA                               38      25     -13
    mthca_ARM_SRQ                                 39      26     -13
    mthca_free_icms                              178     164     -14
    mthca_QUERY_DDR                              389     375     -14
    mthca_resize_cq                             1063    1048     -15
    mthca_unmap_eq_icm                           123     107     -16
    mthca_map_eq_icm                             396     380     -16
    mthca_cmd_box                                 90      74     -16
    mthca_SET_IB                                 433     417     -16
    mthca_RESIZE_CQ                              369     353     -16
    mthca_MAP_ICM_page                           240     224     -16
    mthca_MAP_EQ                                 183     167     -16
    mthca_INIT_IB                                473     457     -16
    mthca_INIT_HCA                               745     729     -16
    mthca_map_user_db                            816     798     -18
    mthca_SYS_EN                                 157     139     -18
    mthca_cleanup_qp_table                        78      59     -19
    mthca_cleanup_eq_table                       168     149     -19
    mthca_UNMAP_ICM                              143     121     -22
    mthca_modify_srq                             172     149     -23
    mthca_unmap_fmr                              198     174     -24
    mthca_query_qp                               814     790     -24
    mthca_query_pkey                             343     319     -24
    mthca_SET_ICM_SIZE                            34      10     -24
    mthca_QUERY_DEV_LIM                         1870    1846     -24
    mthca_map_cmd                               1130    1105     -25
    mthca_ENABLE_LAM                             401     375     -26
    mthca_modify_port                            247     220     -27
    mthca_query_device                           884     850     -34
    mthca_NOP                                     75      41     -34
    mthca_table_get                              287     249     -38
    mthca_init_qp_table                          333     293     -40
    mthca_MODIFY_QP                              348     308     -40
    mthca_close_hca                              131      89     -42
    mthca_free_eq                                435     390     -45
    mthca_query_port                             755     705     -50
    mthca_free_cq                                581     528     -53
    mthca_alloc_icm_table                        578     524     -54
    mthca_multicast_attach                      1041     986     -55
    mthca_init_hca                               326     271     -55
    mthca_query_gid                              487     431     -56
    mthca_free_srq                               524     468     -56
    mthca_free_mr                                168     111     -57
    mthca_create_eq                             1560    1501     -59
    mthca_multicast_detach                       790     728     -62
    mthca_write_mtt                              918     854     -64
    mthca_register_device                       1406    1342     -64
    mthca_fmr_alloc                              947     883     -64
    mthca_mr_alloc                               652     582     -70
    mthca_process_mad                           1242    1164     -78
    mthca_dev_lim                                910     830     -80
    find_mgm                                     482     400     -82
    mthca_modify_qp                             3852    3753     -99
    mthca_init_cq                               1281    1181    -100
    mthca_alloc_srq                             1719    1610    -109
    mthca_init_eq_table                         1807    1679    -128
    mthca_init_tavor                             761     491    -270
    mthca_init_arbel                            2617    2098    -519

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>

1 files changed, 14 insertions, 29 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 8c2a83732b5d..7d2e42dd6926 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -223,7 +223,6 @@ int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int ob
 {
 	int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
 	int ret = 0;
-	u8 status;
 
 	mutex_lock(&table->mutex);
 
@@ -240,8 +239,8 @@ int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int ob
 		goto out;
 	}
 
-	if (mthca_MAP_ICM(dev, table->icm[i], table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
-			  &status) || status) {
+	if (mthca_MAP_ICM(dev, table->icm[i],
+			  table->virt + i * MTHCA_TABLE_CHUNK_SIZE)) {
 		mthca_free_icm(dev, table->icm[i], table->coherent);
 		table->icm[i] = NULL;
 		ret = -ENOMEM;
@@ -258,7 +257,6 @@ out:
 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
 {
 	int i;
-	u8 status;
 
 	if (!mthca_is_memfree(dev))
 		return;
@@ -269,8 +267,7 @@ void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int o
 
 	if (--table->icm[i]->refcount == 0) {
 		mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
-				MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
-				&status);
+				MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE);
 		mthca_free_icm(dev, table->icm[i], table->coherent);
 		table->icm[i] = NULL;
 	}
@@ -366,7 +363,6 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
 	int num_icm;
 	unsigned chunk_size;
 	int i;
-	u8 status;
 
 	obj_per_chunk = MTHCA_TABLE_CHUNK_SIZE / obj_size;
 	num_icm = DIV_ROUND_UP(nobj, obj_per_chunk);
@@ -396,8 +392,8 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
 						__GFP_NOWARN, use_coherent);
 		if (!table->icm[i])
 			goto err;
-		if (mthca_MAP_ICM(dev, table->icm[i], virt + i * MTHCA_TABLE_CHUNK_SIZE,
-				  &status) || status) {
+		if (mthca_MAP_ICM(dev, table->icm[i],
+				  virt + i * MTHCA_TABLE_CHUNK_SIZE)) {
 			mthca_free_icm(dev, table->icm[i], table->coherent);
 			table->icm[i] = NULL;
 			goto err;
@@ -416,8 +412,7 @@ err:
 	for (i = 0; i < num_icm; ++i)
 		if (table->icm[i]) {
 			mthca_UNMAP_ICM(dev, virt + i * MTHCA_TABLE_CHUNK_SIZE,
-					MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
-					&status);
+					MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE);
 			mthca_free_icm(dev, table->icm[i], table->coherent);
 		}
 
@@ -429,13 +424,12 @@ err:
 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table)
 {
 	int i;
-	u8 status;
 
 	for (i = 0; i < table->num_icm; ++i)
 		if (table->icm[i]) {
-			mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
-					MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
-					&status);
+			mthca_UNMAP_ICM(dev,
+					table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
+					MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE);
 			mthca_free_icm(dev, table->icm[i], table->coherent);
 		}
 
@@ -454,7 +448,6 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
 {
 	struct page *pages[1];
 	int ret = 0;
-	u8 status;
 	int i;
 
 	if (!mthca_is_memfree(dev))
@@ -494,9 +487,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
 	}
 
 	ret = mthca_MAP_ICM_page(dev, sg_dma_address(&db_tab->page[i].mem),
-				 mthca_uarc_virt(dev, uar, i), &status);
-	if (!ret && status)
-		ret = -EINVAL;
+				 mthca_uarc_virt(dev, uar, i));
 	if (ret) {
 		pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
 		put_page(sg_page(&db_tab->page[i].mem));
@@ -557,14 +548,13 @@ void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
 			       struct mthca_user_db_table *db_tab)
 {
 	int i;
-	u8 status;
 
 	if (!mthca_is_memfree(dev))
 		return;
 
 	for (i = 0; i < dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; ++i) {
 		if (db_tab->page[i].uvirt) {
-			mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, uar, i), 1, &status);
+			mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, uar, i), 1);
 			pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
 			put_page(sg_page(&db_tab->page[i].mem));
 		}
@@ -581,7 +571,6 @@ int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
 	int i, j;
 	struct mthca_db_page *page;
 	int ret = 0;
-	u8 status;
 
 	mutex_lock(&dev->db_tab->mutex);
 
@@ -644,9 +633,7 @@ alloc:
 	memset(page->db_rec, 0, MTHCA_ICM_PAGE_SIZE);
 
 	ret = mthca_MAP_ICM_page(dev, page->mapping,
-				 mthca_uarc_virt(dev, &dev->driver_uar, i), &status);
-	if (!ret && status)
-		ret = -EINVAL;
+				 mthca_uarc_virt(dev, &dev->driver_uar, i));
 	if (ret) {
 		dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
 				  page->db_rec, page->mapping);
@@ -678,7 +665,6 @@ void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
 {
 	int i, j;
 	struct mthca_db_page *page;
-	u8 status;
 
 	i = db_index / MTHCA_DB_REC_PER_PAGE;
 	j = db_index % MTHCA_DB_REC_PER_PAGE;
@@ -694,7 +680,7 @@ void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
 
 	if (bitmap_empty(page->used, MTHCA_DB_REC_PER_PAGE) &&
 	    i >= dev->db_tab->max_group1 - 1) {
-		mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
+		mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1);
 
 		dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
 				  page->db_rec, page->mapping);
@@ -745,7 +731,6 @@ int mthca_init_db_tab(struct mthca_dev *dev)
 void mthca_cleanup_db_tab(struct mthca_dev *dev)
 {
 	int i;
-	u8 status;
 
 	if (!mthca_is_memfree(dev))
 		return;
@@ -763,7 +748,7 @@ void mthca_cleanup_db_tab(struct mthca_dev *dev)
 		if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE))
 			mthca_warn(dev, "Kernel UARC page %d not empty\n", i);
 
-		mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
+		mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1);
 
 		dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
 				  dev->db_tab->page[i].db_rec,