bnxt_en: The caller of bnxt_alloc_ctx_mem() should always free bp->ctx

bnxt_alloc_ctx_mem() calls bnxt_hwrm_func_backing_store_qcaps() to
allocate the memory for bp->ctx.  Initialize bp->ctx with the allocated
memory and let the caller free it during unwind.  The unwind logic is
already there, we just need to always set bp->ctx to the allocated
memory so the caller will always free it.  This simplifies the logic
and makes it easier to expand on the backing store logic.
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231120234405.194542-2-michael.chan@broadcom.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -7233,6 +7233,8 @@ static int bnxt_hwrm_func_backing_store_qcaps(struct bnxt *bp)
 			rc = -ENOMEM;
 			goto ctx_err;
 		}
+		bp->ctx = ctx;
+
 		ctx->qp_max_entries = le32_to_cpu(resp->qp_max_entries);
 		ctx->qp_min_qp1_entries = le16_to_cpu(resp->qp_min_qp1_entries);
 		ctx->qp_max_l2_entries = le16_to_cpu(resp->qp_max_l2_entries);
@@ -7276,13 +7278,11 @@ static int bnxt_hwrm_func_backing_store_qcaps(struct bnxt *bp)
 		tqm_rings = ctx->tqm_fp_rings_count + BNXT_MAX_TQM_SP_RINGS;
 		ctx_pg = kcalloc(tqm_rings, sizeof(*ctx_pg), GFP_KERNEL);
 		if (!ctx_pg) {
-			kfree(ctx);
 			rc = -ENOMEM;
 			goto ctx_err;
 		}
 		for (i = 0; i < tqm_rings; i++, ctx_pg++)
 			ctx->tqm_mem[i] = ctx_pg;
-		bp->ctx = ctx;
 	} else {
 		rc = 0;
 	}