RDMA/qib: Use the bitmap API when applicable

Using the bitmap API is less verbose than hand writing them.
It also improves the semantic.

While at it, initialize the bitmaps. It can't hurt.

Link: https://lore.kernel.org/r/33d8992586d382bec8b8efd83e4729fb7feaf89e.1656834106.git.christophe.jaillet@wanadoo.frSigned-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/qib/qib_iba7322.c

@@ -2850,9 +2850,9 @@ static void qib_setup_7322_cleanup(struct qib_devdata *dd)
 
 	qib_7322_free_irq(dd);
 	kfree(dd->cspec->cntrs);
-	kfree(dd->cspec->sendchkenable);
-	kfree(dd->cspec->sendgrhchk);
-	kfree(dd->cspec->sendibchk);
+	bitmap_free(dd->cspec->sendchkenable);
+	bitmap_free(dd->cspec->sendgrhchk);
+	bitmap_free(dd->cspec->sendibchk);
 	kfree(dd->cspec->msix_entries);
 	for (i = 0; i < dd->num_pports; i++) {
 		unsigned long flags;
@@ -6383,18 +6383,11 @@ static int qib_init_7322_variables(struct qib_devdata *dd)
 	features = qib_7322_boardname(dd);
 
 	/* now that piobcnt2k and 4k set, we can allocate these */
-	sbufcnt = dd->piobcnt2k + dd->piobcnt4k +
-		NUM_VL15_BUFS + BITS_PER_LONG - 1;
-	sbufcnt /= BITS_PER_LONG;
-	dd->cspec->sendchkenable =
-		kmalloc_array(sbufcnt, sizeof(*dd->cspec->sendchkenable),
-			      GFP_KERNEL);
-	dd->cspec->sendgrhchk =
-		kmalloc_array(sbufcnt, sizeof(*dd->cspec->sendgrhchk),
-			      GFP_KERNEL);
-	dd->cspec->sendibchk =
-		kmalloc_array(sbufcnt, sizeof(*dd->cspec->sendibchk),
-			      GFP_KERNEL);
+	sbufcnt = dd->piobcnt2k + dd->piobcnt4k + NUM_VL15_BUFS;
+
+	dd->cspec->sendchkenable = bitmap_zalloc(sbufcnt, GFP_KERNEL);
+	dd->cspec->sendgrhchk = bitmap_zalloc(sbufcnt, GFP_KERNEL);
+	dd->cspec->sendibchk = bitmap_zalloc(sbufcnt, GFP_KERNEL);
 	if (!dd->cspec->sendchkenable || !dd->cspec->sendgrhchk ||
 		!dd->cspec->sendibchk) {
 		ret = -ENOMEM;